Safety / Relief Valve
medium
224 models total
Safety / Relief Valve for marine and industrial applications. Models listed here carry an official DNV type approval certificate or a verified manufacturer datasheet.
1 manufacturers · 1–100 of 224 models
LESER GmbH
100
API | LESER - The Safety Valve
Engster Strömungsdurchmesser d₀
14 mm - 161.5 mm | 0.551 in - 6.36 in
Ansprechdruck
0.12 bar - 413.7 bar | 2 psig - 6,000 psig
Temperatur (nach DIN EN)
-268 °C bis 538 °C | -450 °F bis 1,000 °F
Gehäusewerkstoffe
1.0619, 1.4408, 1.7357 | SA 216 WCB, SA 351 CF8M, SA 217 WC6, SA 352 LCB, SA 351 CF3M, SA 995 Gr 4A CD3MN (Duplex), SA 494 M35-1 (Monel), SA 494 CX2MW (Hastelloy)
Ventilanschluss
Flange in accordance with ASME B 16.5 or DIN EN 1092
Faltenbalgwerkstoff (optional)
INCONEL 625
Manufacturer catalogue data, harvested 2026-08-15 09:17:10.
APIType 526 IC
Set pressure (according to ASME)
0.12 - 414 bar | 2 - 6.000 psig
Temperature(according to ASME)
-196 to 538 °C |-321 to 1000 °F
Connections ASME B16.5
NPS 1 to NPS 8
Flange class Inlet ASME B16.5
Class 150 - Class 2500
Body material
SA 216 WCB, SA 351 CF8M, SA 217 WC6, SA 352 LCB, SA 351 CF3M, SA 995 Gr 4A CD3MN (Duplex), SA 494 M35-1 (Monel), SA 494 CX2MW (Hastelloy)
Narrowest flow diameter d₀
14 - 161.5 mm | 0.55 - 6.36 in
Narrowest flow area A₀
154 - 20,485 mm² | 0.239 - 31.75 in²
Bellows material (optional)
INCONEL® 625 LCF
Manufacturer catalogue data, harvested 2026-08-15 09:17:14.
APIType 526 CC
Set pressure (according to ASME)
0.12 - 414 bar | 2 - 6.000 psig
Temperature(according to ASME)
-196 to 538 °C |-321 to 1000 °F
Connections DIN EN 1092
DN 25 to DN 200
Connections ASME B16.5
NPS 1 to NPS 8
Flange pressure rating inlet DIN EN 1092
PN16 to PN 400
Flange class Inlet ASME B16.5
Class 150 - Class 2500
Body material
SA 216 WCB, SA 351 CF8M, SA 217 WC6, SA 352 LCB, SA 351 CF3M, SA 995 Gr 4A CD3MN (Duplex), SA 494 M35-1 (Monel)
Narrowest flow diameter d₀
14 - 161.5 mm | 0.55 - 6.36 in
Narrowest flow area A₀
154 - 20,485 mm² | 0.239 - 31.75 in²
Bellows material (optional)
INCONEL® 625 LCF
Manufacturer catalogue data, harvested 2026-08-15 09:17:16.
High EfficiencyType 814
Ansprechdruck (nach CE)
2,5 - 102 bar | 36 - 1.479 psig
Ansprechdruck (nach ASME)
2,5 - 102 bar | 36 - 1.479 psig
Temperatur (nach CE)
-45 bis 200 °C (Einzelfall: -162 bis 300 °C)
Temperatur (nach ASME)
-49 bis 392 °F (Einzelfall: -259,6 bis 572 °F)
Leistung
Orifice P+ - T+
Anschlüsse DIN EN 1092
DN 100 - DN 200
Anschlüsse ASME B16.5
NPS 4 bis NPS 8
Flanschdruckstufe Eintritt DIN EN 1092
PN 10 - PN 100
Flanschdruckstufe Eintritt ASME B16.5
Class 150 - Class 600
Gehäusewerkstoff
1.0619, 1.4408 | SA 216 WCB, SA 351 CF8M, SA 352 LCB, SA 351 CF3M
Engster Strömungsdurchmesser d₀
95 - 180 mm | 3,74 - 7,087 in
Sitzdichtung
Weichdichtend, Metallisch, Dichtplatte
pdf_API-Standard 526 hinausgehen
Die Extra Orifices ermög-
Pdf flansch-feder-sicherheitsventile
des POSVs.
pdf_Druckabsenkung gem
Maximal zulässiger Drucksteigerung
pdf_liche Druckbereiche verwendet
Im Allgemeinen werden mäßig verwendet wird.
pdf_von Regelwerk und Standards
Ein regelwerkskonformer
pdf_ren Druckanstieg zu verhindern
Im Unterschied zum
pdf_Ansprechdrucks (s
unten 2 und 3). Ab Punkt 2 erfolgt Mediumverlust wird vermieden.
pdf_Druck konstant
Ein konstantes Domvolumen ist die
Pdf werkstoff
316L / 1.4404
pdf_PN 10 H50 8214
0750 0760 0770 2100 0780 0790 0800 0810 2110 0820 0830 2120 0840 2130
pdf_PN 16 H51 8113
0750 0760 0770 2100 0780 0790 0800 0810 2110 0820 0830 2120 0840 2130
Pdf zulassungs-nr
M37268
Manufacturer catalogue data, harvested 2026-08-15 09:17:22.
High EfficiencyType 824
Ansprechdruck (nach CE)
2,5 - 102 bar | 36 - 1.479 psig
Ansprechdruck (nach ASME)
2,5 - 102 bar | 36 - 1.479 psig
Temperatur (nach CE)
-45 bis 200 °C (Einzelfall: -162 bis 300 °C)
Temperatur (nach ASME)
-49 bis 392 °F (Einzelfall: -259,6 bis 572 °F)
Leistung
Orifice P+ - T+
Anschlüsse DIN EN 1092
DN 100 - DN 200
Anschlüsse ASME B16.5
NPS 4 bis NPS 8
Flanschdruckstufe Eintritt DIN EN 1092
PN 10 - PN 100
Flanschdruckstufe Eintritt ASME B16.5
Class 150 - Class 600
Gehäusewerkstoff
1.0619, 1.4408 | SA 216 WCB, SA 351 CF8M, SA 352 LCB, SA 351 CF3M
Engster Strömungsdurchmesser d₀
95 - 180 mm | 3,74 - 7,087 in
Sitzdichtung
Weichdichtend, Metallisch, Dichtplatte
pdf_API-Standard 526 hinausgehen
Die Extra Orifices ermög-
Pdf flansch-feder-sicherheitsventile
des POSVs.
pdf_Druckabsenkung gem
Maximal zulässiger Drucksteigerung
pdf_liche Druckbereiche verwendet
Im Allgemeinen werden mäßig verwendet wird.
pdf_von Regelwerk und Standards
Ein regelwerkskonformer
pdf_ren Druckanstieg zu verhindern
Im Unterschied zum
pdf_Ansprechdrucks (s
unten 2 und 3). Ab Punkt 2 erfolgt Mediumverlust wird vermieden.
pdf_Druck konstant
Ein konstantes Domvolumen ist die
Pdf werkstoff
316L / 1.4404
pdf_PN 10 H50 8214
0750 0760 0770 2100 0780 0790 0800 0810 2110 0820 0830 2120 0840 2130
pdf_PN 16 H51 8113
0750 0760 0770 2100 0780 0790 0800 0810 2110 0820 0830 2120 0840 2130
Pdf zulassungs-nr
M37268
Manufacturer catalogue data, harvested 2026-08-15 09:17:26.
Type 459 HDD | LESER - The Safety Valve
Nennweite im Eintritt - Gewinde
1/2" - 1" | 1/2" - 1“
Nennweite im Eintritt - Flansch
DN 15 - DN 25 | 1/2" - 1"
Engster Strömungsdurchmesser d₀
6 - 9 mm | 0,236 - 0,354 in
Ansprechdruck
250,01 - 850 bar | 3626 - 12328 psig
Flanschdruckstufe Eintritt
PN 320 - PN 400 | CL1500 - CL2500
Temperatur (nach DIN EN)
-273 bis 400 °C | -459 bis 752 °F
Temperatur (nach ASME)
-196 bis 450 °C | -321 bis 842 °F
Werkstoff Austrittsgehäuse
1.4408 | SA 351 CF8M
Werkstoff Eintrittskörper
1.4404 stellitiert | SA 479 316L stellitiert
Ventilanschluss
Gewinde gem. DIN ISO 228-1, ISO 7-1 / BS 21 oder ASME B1.20.1 Flansch gem. DIN EN 1092-1 oder ASME B16.5
Faltenbalgwerkstoff (optional)
Edelstahl (nur für d09)
Zulassungen
DGRL/ DIN EN ISO 4126-1, AD 2000-Merkblatt A2, ASME Section XIII zertifiziert für Section VIII Div. 1 Anwendungen, CRN, EAC, AQSIQ, SAMR
Manufacturer catalogue data, harvested 2026-08-15 09:17:40.
Type 462 | LESER - The Safety Valve
Nennweite im Eintritt - Gewinde
1/2" - 1 1/2" | 1/2" - 1 1/2"
Nennweite im Eintritt - Flansch
DN 15 - DN 25 | 1/2" - 1"
Engster Strömungsdurchmesser d₀
9 - 17,5 mm | 0,354 - 0,689 in
Ansprechdruck
0,5 - 250 bar | 7,3 - 3626 psig
Flanschdruckstufe Eintritt
PN 40 - PN 400 | CL150 - CL2500
Temperatur (nach DIN EN)
-45 bis 150 °C | -49 bis 302 °F
Temperatur (nach ASME)
-45 bis 150 °C | -49 bis 302 °F
Werkstoff Austrittsgehäuse
1.0619, 1.4408, 0.7043 | SA 216 WCB, SA 351 CF8M, Duktil Gr. 60-40-18
Werkstoff Eintrittskörper
1.4104, 1.4404 | SA 479 430, SA 479 316L
Ventilanschluss
Gewinde gem. DIN ISO 228-1, ISO 7-1 / BS 21 oder ASME B1.20.1 Flansch gem. DIN EN 1092-1 oder ASME B16.5
Faltenbalgwerkstoff (optional)
Edelstahl und Elastomer
Zulassungen
DGRL/ DIN EN ISO 4126-1, AD 2000-Merkblatt A2, ASME Section XIII zertifiziert für Section VIII Div. 1 Anwendungen, CRN, AQSIQ, EAC
Manufacturer catalogue data, harvested 2026-08-15 09:17:42.
Type 462 HDD | LESER - The Safety Valve
Nennweite im Eintritt - Gewinde
1/2" - 1“ | 1/2" - 1“
Nennweite im Eintritt - Flansch
DN 15 - DN 25 | 1/2" - 1"
Engster Strömungsdurchmesser d₀
9 mm | 0,354 in
Ansprechdruck
250,01 - 350 bar | 3626 - 5076 psig
Flanschdruckstufe Eintritt
PN 320 - PN 400 | CL1500 - CL2500
Temperatur (nach DIN EN)
-45 bis 150 °C | -49 bis 302 °F
Temperatur (nach ASME)
-45 bis 150 °C | -49 bis 302 °F
Werkstoff Austrittsgehäuse
1.4408 | SA 351 CF8M
Werkstoff Eintrittskörper
1.4404 | SA 479 316L
Ventilanschluss
Gewinde gem. DIN ISO 228-1, ISO 7-1 / BS 21 oder ASME B1.20.1 Flansch gem. DIN EN 1092-1 oder ASME B16.5
Faltenbalgwerkstoff (optional)
Edelstahl
Zulassungen
DGRL/ DIN EN ISO 4126-1, AD 2000-Merkblatt A2, ASME Section XIII zertifiziert für Section VIII Div. 1 Anwendungen, CRN, AQSIQ, AQSIQ, SAMR
Manufacturer catalogue data, harvested 2026-08-15 09:17:44.
Type 237 CC | LESER - The Safety Valve
Nennweite im Eintritt - Gewinde
3/8" - 1"
Nennweite im Eintritt - Flansch
½“ – 1“
Engster Strömungsdurchmesser d₀
10 mm | 0,39 in
Ansprechdruck
0,1 - 68 bar g | 1,422 - 967 psig
Flanschdruckstufe Eintritt
CL150 - CL600
Temperatur (nach DIN EN)
-273 bis 280 °C | -459 bis 536 °F
Werkstoff Austrittsgehäuse
SA479 CF8M
Werkstoff Eintrittskörper
SA 479 316L
Ventilanschluss
Gewinde gemäß DIN ISO 228-1, ISO 7-1 / BS 21 oder ASME B1.20.1; Flansch gemäß ASME B 16.5
Zulassungen
ASME Sec. VIII Div. 1, AQSIQ, TS
Manufacturer catalogue data, harvested 2026-08-15 09:17:46.
Type 459 CC | LESER - The Safety Valve
Nennweite im Eintritt - Gewinde
1/2" - 1 1/2" | 1/2" - 1 1/2"
Nennweite im Eintritt - Flansch
DN 15 - DN 25 | 1/2" - 1"
Engster Strömungsdurchmesser d₀
9 - 17,5 mm | 0,354 - 0,689 in
Ansprechdruck
0,2 - 250 bar | 2,9 - 3626 psig
Flanschdruckstufe Eintritt
PN 40 - PN 400 | CL150 - CL2500
Temperatur (nach DIN EN)
-273 bis 450 °C | -459 bis 842 °F
Temperatur (nach ASME)
-273 bis 450 °C
Werkstoff Austrittsgehäuse
SA 216 WCB, SA 351 CF8M
Werkstoff Eintrittskörper
1.4104, 1.4404 | SA 479 316L
Ventilanschluss
Gewinde gem. DIN ISO 228-1, ISO 7-1 / BS 21 oder ASME B1.20.1 Flansch gem. ASME B16.5
Faltenbalgwerkstoff (optional)
Edelstahl 316Ti
Zulassungen
ASME Sec. VIII Div. 1, TS, AQSIQ
Manufacturer catalogue data, harvested 2026-08-15 09:17:48.
High Performance
Ansprechdruck
0,1 - 300 barg | 1,5 - 4.350 psig
Temperatur
-270 - 550 °C | -454 - 1.022 °F
Leistung
Orifice F- bis X
Anschlüsse DIN EN 1092
DN 20 bis DN 400
Anschlüsse ASME B16.5
NPS 3/4 bis NPS 16
Gehäusewerkstoff
Grauguss, Sphäroguss, Stahlguss, warmfester Stahlguss, Edelstahlguss
Manufacturer catalogue data, harvested 2026-08-15 09:17:50.
Type 441, 442 DIN | LESER - The Safety Valve
Engster Strömungsdurchmesser d₀
18 - 165 mm | 0,71 - 6,5 in
Ansprechdruck
0,1 - 40 bar | 1,5 - 580 psig
Flanschdruckstufe Eintritt
PN 16 - PN 40 | CL150 - CL300
Temperatur (nach DIN EN)
-270 bis 450 °C | -454 bis 842 °F
Temperatur (nach ASME)
-268 bis 538 °C | -450 bis 1000 °F
Gehäusewerkstoffe
0.6025, 0.7043, 1.0619, 1.4408 | Grauguss, Duktile Gr. 60-40-18, SA 216 WCB, SA 351 CF8M
Ventilanschluss
Flansch gemäß DIN EN 1092-1 oder gemäß ASME B 16.5 oder gemäß JIS 2220
Faltenbalgwerkstoff (optional)
Edelstahl und Elastomer
Zulassungen
DGRL/DIN EN ISO 4126-1, DGRL/AD 2000-Merkblatt A2, ASME Section XIII zertifiziert für Section VIII Div. 1 Anwendungen, CRN, AQSIQ, EAC
Manufacturer catalogue data, harvested 2026-08-15 09:17:52.
Type 441, 442 ANSI | LESER - The Safety Valve
Engster Strömungsdurchmesser d₀
23 - 92 mm | 0,91 - 3,62 in
Ansprechdruck
0,1 - 51 bar | 1,5 - 740 psig
Flanschdruckstufe Eintritt
CL150 - CL300 | CL150 - CL300
Temperatur (nach DIN EN)
-270 bis 450 °C | -454 bis 842 °F
Temperatur (nach ASME)
-268 bis 538 °C | -450 bis 1000 °F
Gehäusewerkstoffe
1.0619, 1.4408 | SA 216 WCB, SA 351 CF8M
Ventilanschluss
Flansch gemäß ASME B 16.5 oder gemäß JIS 2220
Faltenbalgwerkstoff (optional)
Edelstahl und Elastomer
Zulassungen
DGRL/DIN EN ISO 4126-1, DGRL/AD 2000-Merkblatt A2, ASME Section XIII zertifiziert für Section VIII Div. 1 Anwendungen, CRN, AQSIQ, EAC
Manufacturer catalogue data, harvested 2026-08-15 09:17:54.
Type 441, 442 Große Nennweiten| LESER - The Safety Valve
Engster Strömungsdurchmesser d₀
200 - 295 mm | 6,5 - 11,61 in
Ansprechdruck
0,2 - 25 bar | 2,9 - 363 psig
Flanschdruckstufe Eintritt
PN 16 - PN 25 | CL150 - CL300
Temperatur (nach DIN EN)
-196 bis 550 °C | -321 bis 1022 °F
Temperatur (nach ASME)
-184 bis 427 °C | -300 bis 800 °F
Gehäusewerkstoffe
1.0460 / 1.0425, 1.4571 | Stahl, 316Ti
Ventilanschluss
Flansch gemäß DIN EN 1092-1 oder gemäß ASME B 16.5 oder gemäß JIS 2220
Faltenbalgwerkstoff (optional)
Edelstahl
Zulassungen
DGRL/DIN EN ISO 4126-1, DGRL/AD 2000-Merkblatt A2, ASME Section XIII zertifiziert für Section VIII Div. 1 Anwendungen, CRN, AQSIQ, EAC
Manufacturer catalogue data, harvested 2026-08-15 09:17:56.
Type 444 DIN | LESER - The Safety Valve
Engster Strömungsdurchmesser d₀
23 - 74 mm | 0,91 - 2,91 in
Ansprechdruck
0,1 - 16 bar | 1,5 - 232 psig
Flanschdruckstufe Eintritt
PN 16 | PN 16
Temperatur (nach DIN EN)
-45 bis 200 °C | -49 bis 392 °F
Temperatur (nach ASME)
-45 bis 200 °C | -49 bis 392 °F
Gehäusewerkstoffe
1.4404 | SA 479 316L
Ventilanschluss
Flansch gemäß DIN EN 1092-1 oder gemäß ASME B16.5 oder gemäß JIS 2220
Faltenbalgwerkstoff (optional)
Kein Faltenbalg erhältlich
Zulassungen
DGRL/DIN EN ISO 4126-1, DGRL/AD 2000-Merkblatt A2, ASME Section XIII zertifiziert für Section VIII Div. 1 Anwendungen, CRN, AQSIQ, EAC
Manufacturer catalogue data, harvested 2026-08-15 09:17:58.
Type 444 ANSI | LESER - The Safety Valve
Engster Strömungsdurchmesser d₀
23 - 74 mm | 0,91 - 2,91 in
Ansprechdruck
0,1 - 16 bar | 1,5 - 232 psig
Flanschdruckstufe Eintritt
CL150 | CL150
Temperatur (nach DIN EN)
-45 bis 200 °C | -49 bis 392 °F
Temperatur (nach ASME)
-45 bis 200 °C | -49 bis 392 °F
Gehäusewerkstoffe
1.4404 | SA 479 316L
Ventilanschluss
Flansch gemäß ASME B 16.5 oder gemäß JIS 2220
Faltenbalgwerkstoff (optional)
Kein Faltenbalg erhältlich
Zulassungen
DGRL/DIN EN ISO 4126-1, DGRL/AD 2000-Merkblatt A2, ASME Section XIII zertifiziert für Section VIII Div. 1 Anwendungen, CRN, AQSIQ, EAC
Manufacturer catalogue data, harvested 2026-08-15 09:18:00.
Type 441, 442 Full nozzle DIN | LESER - The Safety Valve
Engster Strömungsdurchmesser d₀
23 - 46 mm | 0,91 - 1,81 in
Ansprechdruck
0,1 - 40 bar | 1,5 - 580 psig
Flanschdruckstufe Eintritt
PN 16 - PN 40 | CL150 - CL300
Temperatur (nach DIN EN)
-270 bis 450 °C | -454 bis 842 °F
Temperatur (nach ASME)
-268 bis 538 °C | -450 bis 1000 °F
Gehäusewerkstoffe
1.0619, 1.4408 | SA 216 WCB, SA 351 CF8M
Ventilanschluss
Flansch gemäß DIN EN 1092-1 oder gemäß ASME B 16.5 oder gemäß JIS 2220
Faltenbalgwerkstoff (optional)
Edelstahl und Elastomer
Zulassungen
DGRL/DIN EN ISO 4126-1, DGRL/AD 2000-Merkblatt A2, ASME Section XIII zertifiziert für Section VIII Div. 1 Anwendungen, CRN, AQSIQ, EAC
Manufacturer catalogue data, harvested 2026-08-15 09:18:02.
Type 441, 442 Full nozzle ANSI | LESER - The Safety Valve
Engster Strömungsdurchmesser d₀
23 - 92 mm | 0,91 - 3,62 in
Ansprechdruck
0,1 - 51 bar | 1,5 - 740 psig
Flanschdruckstufe Eintritt
CL150 - CL300 | CL150 - CL300
Temperatur (nach DIN EN)
-270 bis 450 °C | -454 bis 842 °F
Temperatur (nach ASME)
-268 bis 538 °C | -450 bis 1000 °F
Gehäusewerkstoffe
1.0619, 1.4408 | SA 216 WCB, SA 351 CF8M
Ventilanschluss
Flansch gemäß ASME B 16.5 oder gemäß JIS 2220
Faltenbalgwerkstoff (optional)
Edelstahl und Elastomer
Zulassungen
DGRL/DIN EN ISO 4126-1, DGRL/AD 2000-Merkblatt A2, ASME Section XIII zertifiziert für Section VIII Div. 1 Anwendungen, CRN, AQSIQ, EAC
Manufacturer catalogue data, harvested 2026-08-15 09:18:04.
Type 455, 456 | LESER - The Safety Valve
Engster Strömungsdurchmesser d₀
20 - 74 mm | 0,79 - 2,91 in
Ansprechdruck
2,5 - 100 bar | 36 - 1450 psig
Flanschdruckstufe Eintritt
PN 63 - PN 160 | CL150 - CL1500
Temperatur (nach DIN EN)
-85 bis 550 °C | -121 bis 1022 °F
Temperatur (nach ASME)
-29 bis 538 °C | -20 bis 1000 °F
Gehäusewerkstoffe
1.0619, 1.4581, 1.7357 | SA 216 WCB, SA 351 CF10M, SA 217 WC6
Ventilanschluss
Flansch gemäß DIN EN 1092-1 oder gemäß ASME B 16.5 oder gemäß JIS 2220
Faltenbalgwerkstoff (optional)
Edelstahl
Zulassungen
DGRL/DIN EN ISO 4126-1, DGRL/AD 2000-Merkblatt A2, ASME Section XIII zertifiziert für Section VIII Div. 1 Anwendungen, CRN, AQSIQ, EAC
Manufacturer catalogue data, harvested 2026-08-15 09:18:06.
Type 457, 458 | LESER - The Safety Valve
Engster Strömungsdurchmesser d₀
15 - 110 mm | 0,59 - 4,33 in
Ansprechdruck
2,5 - 300 bar | 2,5 - 300 bar
Flanschdruckstufe Eintritt
PN 40 - PN 250 | PN 40 - PN 250
Temperatur (nach DIN EN)
-85 bis 550 °C | -121 bis 1022 °F
Temperatur (nach ASME)
-29 bis 538 °C | -20 bis 1000 °F
Gehäusewerkstoffe
1.0619, 1.4581, 1.7357 | SA 216 WCB, SA 351 CF10M, SA 217 WC6
Ventilanschluss
Flansch gemäß DIN EN 1092-1 oder gemäß ASME B 16.5 oder gemäß JIS 2220
Faltenbalgwerkstoff (optional)
Edelstahl
Zulassungen
DGRL/DIN EN ISO 4126-1, DGRL/AD 2000-Merkblatt A2, ASME Section XIII zertifiziert für Section VIII Div. 1 Anwendungen, CRN, AQSIQ, EAC
Manufacturer catalogue data, harvested 2026-08-15 09:18:08.
Type 441 CC | LESER - The Safety Valve
Engster Strömungsdurchmesser d₀
18 - 92 mm | 0,71 - 3,62 in
Ansprechdruck
0,5 - 40 bar | 7,25 - 580 psig
Flanschdruckstufe Eintritt
PN 16 - PN 40
Temperatur (nach DIN EN)
-85 bis 450 °C | -121 bis 842 °F
Gehäusewerkstoffe
0.7043, 1.0619 | Duktile Gr. 60-40-18, SA 216 WCB
Ventilanschluss
Flansch gemäß DIN EN 1092-1
Zulassungen
ASME Sec. VIII Div. 1, AQSIQ, TS
Manufacturer catalogue data, harvested 2026-08-15 09:18:10.
Modulate Action Sicherheitsventile | LESER
Engster Strömungsdurchmesser d₀
12 mm - 92 mm | 0,47 in - 3,62 in
Ansprechdruck
0,2 bar - 160 bar | 2,9 psig - 2320,6 psig
Temperatur (nach DIN EN)
-270 °C bis 450 °C | -454 °F bis 842 °F
Gehäusewerkstoffe
0.6025, 0.7043, 1.0619, 1.4408
Ventilanschluss
Flansch gemäß DIN EN 1092 oder ASME B16.5
Faltenbalgwerkstoff (optional)
Edelstahl und Elastomer
Manufacturer catalogue data, harvested 2026-08-15 09:18:14.
Type 431 / 433 | LESER - The Safety Valve
Engster Strömungsdurchmesser d₀
12 - 92 mm | 0,47 - 3,62 in
Ansprechdruck
0,2 - 40 bar | 2,9 - 580,15 psig
Flanschdruckstufe Eintritt
PN 16 - PN 40 | CL150 - CL300
Temperatur (nach DIN EN)
-270 bis 450 °C | -454 bis 842 °F
Gehäusewerkstoffe
0.6025, 0.7043, 1.0619, 1.4408
Ventilanschluss
Flansch gemäß DIN EN 1092 oder gemäß ASME B16.5
Faltenbalgwerkstoff (optional)
Edelstahl und Elastomer
Zulassungen
DGRL/ DIN EN ISO 4126-1, DGRL/ AD 2000-Merkblatt A2, AQSIQ, EAC
Manufacturer catalogue data, harvested 2026-08-15 09:18:16.
Type 431 / 433 PN 160 | LESER - The Safety Valve
Engster Strömungsdurchmesser d₀
12 mm | 0,47 in
Ansprechdruck
0,3 - 160 bar | 4,35 - 2320,6 psig
Flanschdruckstufe Eintritt
PN 63 - PN 160 | CL300 - CL600
Temperatur (nach DIN EN)
-270 bis 450 °C | -454 bis 842 °F
Gehäusewerkstoffe
1.0619, 1.4408
Ventilanschluss
Flansch gemäß DIN EN 1092 oder gemäß ASME B16.5
Faltenbalgwerkstoff (optional)
Edelstahl und Elastomer
Zulassungen
DGRL/ DIN EN ISO 4126-1, DGRL/ AD 2000-Merkblatt A2, AQSIQ, EAC
Manufacturer catalogue data, harvested 2026-08-15 09:18:18.
Best Availability - Wechselventile und Berstscheiben | LESER
Temperatur (nach DIN EN)
-273 °C bis +450 °C | -459 °F bis +842 °F
Gehäusewerkstoffe
1.0619, 1.4408|WCB/WCC, LCB, CF8M
Ventilanschluss
Flansch gem. DIN EN 1092-1 sowie ASME B 16.5
Temperatur
-30 °C bis +550 °C | -22 °F bis +1.022 °F (je nach Werkstoff)
Material bursting element
1.4404, 1.4435, Nickel, Inconel®, Monel®, Hastelloy®, Titan, Tantal | 316L, Nickel, Inconel®, Monel®, Hastelloy®, Titan, Tantal
Material sealing membrane
1.4401, Nickel, Inconel®, Monel®, Hastelloy®, Titan, Tantal | 316, Nickel, Inconel®, Monel®, Hastelloy®, Titan, Tantal
Material bursting disc carrier
1.4571, 1.4404, Hastelloy® C4, 1.4571 Tantal beschichtet | 316Ti, 316L, Hastelloy® C4, 316Ti Tantal beschichtet
Manufacturer catalogue data, harvested 2026-08-15 09:18:24.
Type 320 Flow | LESER - The Safety Valve
Flanschdruckstufe Eintritt
PN 10 - PN 250 | CL150 - CL1500
Temperatur (nach DIN EN)
-211 bis 400 °C | -348 bis 752 °F
Temperatur (nach ASME)
-211 bis 400 °C | -348 bis 752 °F
Gehäusewerkstoffe
1.0619, 1.4408 | WCB/WCC, LCB, CF8M
Ventilanschluss
Flansch nach DIN EN 1092-1 / ASME B16.5
Zulassungen
DGRL 2014/68/EU, TR-CU 010, TR-CU 032
pdf_Type 320 Flow
PN 10 – PN 250 / CL150 – CL1500
pdf_auf den Ansprechdruck bezogen
Das AD Regelwerk
pdf_PN 160/CL900
PN 160/CL900:
pdf_PN 250/CL1500
PN 250/CL1500: -196°C/-321°F 400°C/752°F
pdf_Type DN Art.-Nr
stufe1) Breite
pdf_und Stopfbuchsdichtung (Pos
204)
Manufacturer catalogue data, harvested 2026-08-15 09:18:26.
Type 330 Compact | LESER - The Safety Valve
Flanschdruckstufe Eintritt
PN 10 - PN 40 | CL150 - CL300
Temperatur (nach DIN EN)
-211 bis 400 °C | -348 bis 752 °F
Temperatur (nach ASME)
-211 bis 400 °C | -348 bis 752 °F
Gehäusewerkstoffe
1.0619, 1.4408 | WCB/WCC, LCB, CF8M
Zulassungen
DGRL 2014/68/EU, TR-CU 010, TR-CU 032
pdf_Type 320 Flow
PN 10 – PN 250 / CL150 – CL1500
pdf_auf den Ansprechdruck bezogen
Das AD Regelwerk
pdf_PN 160/CL900
PN 160/CL900:
pdf_PN 250/CL1500
PN 250/CL1500: -196°C/-321°F 400°C/752°F
pdf_Type DN Art.-Nr
stufe1) Breite
pdf_und Stopfbuchsdichtung (Pos
204)
Manufacturer catalogue data, harvested 2026-08-15 09:18:28.
KUB | LESER - The Safety Valve
Ansprechdruck
0,4 - 120 bar | 5,8 - 1740 psig
Flanschdruckstufe Eintritt
PN 10 - PN 160 | CL150 - CL900
Temperatur (nach DIN EN)
-30 bis 550 °C | -22 bis 1022 °F
Ventilanschluss
Flansch nach DIN EN 1092 / ASME B16.5
Zulassungen
DGRL/ AD 2000-Merkblatt A1/ A2 DGRL/ DIN EN ISO 4126-1/ -2/ -5 ASME Sec. VIII Div. 1
Material bursting element
1.4404, 1.4435, Nickel, Inconel®, Monel®, Hastelloy®, Titan, Tantal | 316L, Nickel, Inconel®, Monel®, Hastelloy®, Titan, Tantal
Material sealing membrane
1.4401, Nickel, Inconel®, Monel®, Hastelloy®, Titan, Tantal | 316, Nickel, Inconel®, Monel®, Hastelloy®, Titan, Tantal
Material bursting disc carrier
1.4571, 1.4404, Hastelloy® C4, 1.4571 Tantal beschichtet | 316Ti, 316L, Hastelloy® C4, 316Ti Tantal beschichtet
Pdf ansprechdruck
Sondertoleranzen sind möglich. In diesem Fall spe-
pdf_den Betriebsbedingungen ausgelegt
Das Material wird mit Hilfe und ggf. bei Betriebstemperatur
Pdf materialeigenschaften
Das Material der Dichtmembrane wird an die
pdf_Entspannungsventil genannt) montiert
Es ist darauf zu achten, dass
pdf_kennzeichnen die Durchflussrichtung
betragen. Funktionalität und Standzeit der Berstscheibe bleiben
pdf_sind geeignete Dichtungen vorzusehen
Der IG-KUB-Zweiteilhalter ist
pdf_volle Abblaseleistung vorhanden ist
Nach dem Ansprechen kann
pdf_Temperatur von ca
20 °C definiert. Falls erforder-
Pdf temperatur
säurebeständiger
pdf_Im Standard inkl
Werkstoffgütenachweis nach DIN EN 10204-3.1
Manufacturer catalogue data, harvested 2026-08-15 09:18:30.
Clean Service - Edelstahl Sicherheitsventile | LESER
Engster Strömungsdurchmesser d₀
10 mm - 92 mm | 0,394 in - 3,622 in
Ansprechdruck
0,1 bar - 68 bar | 1,5 psig - 986 psig
Temperatur (nach DIN EN)
-45 °C bis 250 °C | -49 °F bis 482 °F
Gehäusewerkstoffe
1.4404, 1.4435 (BN2) | SA 479 316L
Ventilanschluss
Große Vielfalt an Aseptik-Anschlüssen: Gewinde / Flansche / Klemmverbindungen / Schweißanschlüsse
Faltenbalgwerkstoff (optional)
EPDM
Manufacturer catalogue data, harvested 2026-08-15 09:18:32.
Type 481 | LESER - The Safety Valve
Engster Strömungsdurchmesser d₀
10 mm | 0,394 in
Ansprechdruck
0,1 - 68 bar | 1,5 - 986 psig
Temperatur (nach DIN EN)
-45 bis 250 °C | -49 bis 482 °F
Gehäusewerkstoffe
1.4404 | SA 479 316L
Ventilanschluss
Klemmstutzen nach ASME BPE, DIN 32676 oder ISO 2852 Gewindeanschluss nach DIN ISO 228 oder ASME B 1.20.1, Aseptik-Stutzen nach DIN 11864 T1 Reihe A oder B (mit Nutmutter) oder DIN 11851, Neumo-Sterilgewindestutzen (mit Nutmutter)
Zulassungen
DGRL/ DIN EN ISO 4126-1, DGRL/ AD 2000-Merkblatt A2, ASME Section XIII zertifiziert für Section VIII Div. 1 Anwendungen, CRN, AQSIQ, EAC
Manufacturer catalogue data, harvested 2026-08-15 09:18:34.
Type 483 | LESER - The Safety Valve
Engster Strömungsdurchmesser d₀
13 - 25 mm | 0,512 - 0,984 in
Ansprechdruck
0,1 - 16 bar | 1,5 - 232 psig
Temperatur (nach DIN EN)
-45 bis 150 °C | -49 bis 302 °F
Gehäusewerkstoffe
1.4435 (BN2) | SA 479 316L
Faltenbalgwerkstoff (optional)
EPDM
Zulassungen
DGRL/ DIN EN ISO 4126-1, DGRL/ AD 2000-Merkblatt A2, ASME Section XIII zertifiziert für Section VIII Div. 1 Anwendungen, CRN, AQSIQ, EAC
Manufacturer catalogue data, harvested 2026-08-15 09:18:36.
Type 488 | LESER - The Safety Valve
Engster Strömungsdurchmesser d₀
23 - 92 mm | 0,906 - 3,622 in
Ansprechdruck
0,1 - 16 bar | 1,5 - 232 psig
Temperatur (nach DIN EN)
-45 bis 150 °C | -49 bis 302 °F
Gehäusewerkstoffe
1.4404 | SA 479 316L
Faltenbalgwerkstoff (optional)
EPDM
Zulassungen
DGRL/ DIN EN ISO 4126-1, DGRL/ AD 2000-Merkblatt A2, ASME Section XIII zertifiziert für Section VIII Div. 1 Anwendungen, CRN, AQSIQ, EAC
Manufacturer catalogue data, harvested 2026-08-15 09:18:38.
Type 485 | LESER - The Safety Valve
Engster Strömungsdurchmesser d₀
13 - 25 mm | 0,512 - 0,984 in
Ansprechdruck
0,1 - 16 bar | 1,5 - 232 psig
Temperatur (nach DIN EN)
-45 bis 150 °C | -49 bis 302 °F
Gehäusewerkstoffe
1.4435 (BN2) | SA 479 316L
Faltenbalgwerkstoff (optional)
EPDM
Zulassungen
DGRL/ DIN EN ISO 4126-1, DGRL/ AD 2000-Merkblatt A2, ASME Section XIII zertifiziert für Section VIII Div. 1 Anwendungen, CRN, AQSIQ, EAC
Manufacturer catalogue data, harvested 2026-08-15 09:18:40.
Type 484 | LESER - The Safety Valve
Engster Strömungsdurchmesser d₀
13 - 25 mm | 0,512 - 0,984 in
Ansprechdruck
0,1 - 16 bar | 1,5 - 232 psig
Temperatur (nach DIN EN)
-45 bis 150 °C | -49 bis 302 °F
Gehäusewerkstoffe
1.4435 (BN2) | SA 479 316L
Faltenbalgwerkstoff (optional)
EPDM
Zulassungen
DGRL/ DIN EN ISO 4126-1, DGRL/ AD 2000-Merkblatt A2, ASME Section XIII zertifiziert für Section VIII Div. 1 Anwendungen, CRN, AQSIQ, EAC
Manufacturer catalogue data, harvested 2026-08-15 09:18:42.
Critical Service - Ventile mit PTFE Auskleidung | LESER
Engster Strömungsdurchmesser d₀
23 mm - 92 mm | 0,91 in - 3,62 in
Ansprechdruck
0,1 bar - 16 bar | 1,45 psig - 232 psig
Temperatur (nach DIN EN)
-85 °C bis 200 °C | -121 °F bis 392 °F
Gehäusewerkstoffe
1.0460, 1.0619 | SA 105, SA 216 WCB
Ventilanschluss
Flansch gem. DIN EN 1092-1 sowie ASME B 16.5
Faltenbalgwerkstoff (optional)
Edelstahl, PTFE, Hastelloy C276
Manufacturer catalogue data, harvested 2026-08-15 09:18:44.
Type 447 | LESER - The Safety Valve
Engster Strömungsdurchmesser d₀
23 - 92 mm | 0,91 - 3,62 in
Ansprechdruck
0,1 - 16 bar | 1,45 - 232 psig
Flanschdruckstufe Eintritt
PN 16 | CL150
Temperatur (nach DIN EN)
-85 bis 200 °C | -121 bis 392 °F
Temperatur (nach ASME)
-29 bis 200 °C | -200 bis 392 °F
Gehäusewerkstoffe
1.0406, 1.0619, 1.0570 + Virginales PTFE | SA 216 WCB
Ventilanschluss
Flansch gem. DIN EN 1092-1 ASME B 16.5
Faltenbalgwerkstoff (optional)
PTFE
Zulassungen
DGRL/ DIN EN ISO 4126-1, DGRL/ AD 2000-Merkblatt A2, ASME Section XIII zertifiziert für Section VIII Div. 1 Anwendungen, CRN, AQSIQ, EAC
Pdf werkstoffe
PFA
pdf_und inneren Spannungen
Bedingt durch das isostatische – Endbearbeitung
Pdf standard-flanschdruckstufe
Weitere Flanschbohrbilder siehe Seite 31.
pdf_DGRL / Zulassungs-Nr
072020111Z0008/0/09
pdf_ASME Sec
VIII Zulassungs-Nr. M37123
Pdf zulassungs-nr
M37134
pdf_CRN Zulassungs-Nr
Die aktuelle Zulassungsnummer finden Sie unter www.leser.com
pdf_AQSIQ Zulassungs-Nr
Die aktuelle Zulassungsnummer finden Sie unter www.leser.com
pdf_EAC Zulassungs-Nr
Die aktuelle Zulassungsnummer finden Sie unter www.leser.com
pdf_AQSIQ Zulassungs-Nr
Die aktuelle Zulassungsnummer finden Sie unter www.leser.com
pdf_EAC Zulassungs-Nr
Die aktuelle Zulassungsnummer finden Sie unter www.leser.com
pdf_Dichtungsart (Pos
7)
pdf_Sonderwerkstoff z
B. Hastelloy® –
pdf_PTFE-Faltenbalg gegendruckkompensierend
1,2 17,4
Manufacturer catalogue data, harvested 2026-08-15 09:18:46.
Critical ServiceType 447 IC
Set pressure (according to CE)
0.1 - 16 barg
Set pressure (according to ASME)
1.45 - 232 psig
Temperature (according to ASME)
-29 to 200 °C | -20 to 392 °F
Connections ASME B16.5
NPS 1 - NPS 4
Flange class Inlet DIN EN 1092
PN 10 - PN 16
Flange class Inlet ASME B16.5
Class 150
Body material
WCB + Virginal PTFE
Narrowest flow diameter d₀
23 - 92 mm | 0.91 - 3.62 in
Narrowest flow area A₀
416 - 6,648 mm² | 0.645 - 10.304 in²
Bellows material
PTFE-TFM
Pdf werkstoffe
PFA
pdf_und inneren Spannungen
Bedingt durch das isostatische – Endbearbeitung
Pdf standard-flanschdruckstufe
Weitere Flanschbohrbilder siehe Seite 31.
pdf_DGRL / Zulassungs-Nr
072020111Z0008/0/09
pdf_ASME Sec
VIII Zulassungs-Nr. M37123
Pdf zulassungs-nr
M37134
pdf_CRN Zulassungs-Nr
Die aktuelle Zulassungsnummer finden Sie unter www.leser.com
pdf_AQSIQ Zulassungs-Nr
Die aktuelle Zulassungsnummer finden Sie unter www.leser.com
pdf_EAC Zulassungs-Nr
Die aktuelle Zulassungsnummer finden Sie unter www.leser.com
pdf_AQSIQ Zulassungs-Nr
Die aktuelle Zulassungsnummer finden Sie unter www.leser.com
pdf_EAC Zulassungs-Nr
Die aktuelle Zulassungsnummer finden Sie unter www.leser.com
pdf_Dichtungsart (Pos
7)
pdf_Sonderwerkstoff z
B. Hastelloy® –
pdf_PTFE-Faltenbalg gegendruckkompensierend
1,2 17,4
Manufacturer catalogue data, harvested 2026-08-15 09:18:48.
Type 449 | LESER - The Safety Valve
Engster Strömungsdurchmesser d₀
23 - 92 mm | 0,91 - 3,62 in
Ansprechdruck
0,1 - 16 bar | 1,45 - 232 psig
Temperatur (nach DIN EN)
-270 bis 450 °C | -121 bis 392 °F
Gehäusewerkstoffe
Nach Kundenwunsch in sämtlichen Werkstoffen möglich
Ventilanschluss
Flansch gem. DIN EN 1092-1 ASME B 16.5
Faltenbalgwerkstoff (optional)
Edelstahl
Zulassungen
Auf Anfrage
Pdf werkstoffe
PFA
pdf_und inneren Spannungen
Bedingt durch das isostatische – Endbearbeitung
Pdf standard-flanschdruckstufe
Weitere Flanschbohrbilder siehe Seite 31.
pdf_DGRL / Zulassungs-Nr
072020111Z0008/0/09
pdf_ASME Sec
VIII Zulassungs-Nr. M37123
Pdf zulassungs-nr
M37134
pdf_CRN Zulassungs-Nr
Die aktuelle Zulassungsnummer finden Sie unter www.leser.com
pdf_AQSIQ Zulassungs-Nr
Die aktuelle Zulassungsnummer finden Sie unter www.leser.com
pdf_EAC Zulassungs-Nr
Die aktuelle Zulassungsnummer finden Sie unter www.leser.com
pdf_AQSIQ Zulassungs-Nr
Die aktuelle Zulassungsnummer finden Sie unter www.leser.com
pdf_EAC Zulassungs-Nr
Die aktuelle Zulassungsnummer finden Sie unter www.leser.com
pdf_Dichtungsart (Pos
7)
pdf_Sonderwerkstoff z
B. Hastelloy® –
pdf_PTFE-Faltenbalg gegendruckkompensierend
1,2 17,4
Manufacturer catalogue data, harvested 2026-08-15 09:18:50.
S&R Sicherheitsventile | LESER
Engster Strömungsdurchmesser d₀
13 mm - 125 mm | 0,512 in - 4,921 in
Ansprechdruck
0,5 bar - 10 bar | 7,3 psig - 580 psig
Temperatur (nach DIN EN)
-45 °C bis 150 °C | -49 °F bis 302 °F
Gehäusewerkstoffe
0.6025, 0.7043, 1.0619, 430F | Grauguss, Duktil Gr. 60-40-18, SA 216 WCB, 1.4104
Ventilanschluss
Flansch gemäß DIN, Gewinde
Faltenbalgwerkstoff (optional)
Elastomer
Manufacturer catalogue data, harvested 2026-08-15 09:18:53.
Type 424 | LESER - The Safety Valve
Engster Strömungsdurchmesser d₀
23 - 125 mm | 0,98 - 4,92 in
Ansprechdruck
0,5 - 1 bar | 7,2 - 14,5 psig
Flanschdruckstufe Eintritt
PN 16 | PN 16
Temperatur (nach DIN EN)
bis 120 °C | bis 248 °F
Gehäusewerkstoffe
0.6025, (1.6019) | Grauguss, (SA 216 WCB)
Ventilanschluss
Flansche gemäß DIN EN 1092-1
Faltenbalgwerkstoff (optional)
EPDM
Zulassungen
TRD 721, DGRL/ DIN EN ISO 4126-1, DGRL/ AD 2000-Merkblatt A2, EAC
pdf_DIN EN nach/acc
to DIN PN
pdf_Application range
page 2/30-33
pdf_Werkstoffbezeichnung Werkstoff-Nr
Eintritt Austritt bar/bar g
pdf_Ansprechdruck angeben
set pressure and if necessary, accessories.
pdf_Material Designation Material No
to 15/13 20/17,5
Manufacturer catalogue data, harvested 2026-08-15 09:18:54.
Type 440 | LESER - The Safety Valve
Engster Strömungsdurchmesser d₀
18 - 125 mm | 0,71 - 4,92 in
Ansprechdruck
1 - 10 bar | 14,5 - 145 psig
Flanschdruckstufe Eintritt
PN 16 | PN 16
Temperatur (nach DIN EN)
bis zu 120 °C | bis zu 248 °F
Gehäusewerkstoffe
0.6025, (0.7043, 1.0619) | Grauguss, Duktil Gr. 60-40-18, SA 216 WCB
Ventilanschluss
Flansche gemäß DIN
Faltenbalgwerkstoff (optional)
EPDM
Zulassungen
TRD 721, DGRL/ DIN EN ISO 4126-1, DGRL/ AD 2000-Merkblatt A2, EAC
pdf_DIN EN nach/acc
to DIN PN
pdf_Application range
page 2/30-33
pdf_Werkstoffbezeichnung Werkstoff-Nr
Eintritt Austritt bar/bar g
pdf_Ansprechdruck angeben
set pressure and if necessary, accessories.
pdf_Material Designation Material No
to 15/13 20/17,5
Manufacturer catalogue data, harvested 2026-08-15 09:18:56.
Type 460 | LESER - The Safety Valve
Engster Strömungsdurchmesser d₀
13 - 17,5 mm | 0,51 - 0,69 in
Ansprechdruck
1 - 10 bar | 14,5 - 145 psig
Temperatur (nach DIN EN)
bis zu 120 °C | bis zu 248 °F
Gehäusewerkstoffe
1.4104 (Eintritt), 0.7043 (Austritt) | 1.4104 (Eintritt), Duktil Gr. 60-40-18 (Austritt)
Ventilanschluss
Gewinde
Faltenbalgwerkstoff (optional)
EPDM
Zulassungen
TRD 721, DGRL/ DIN EN ISO 4126-1, DGRL/ AD 2000-Merkblatt A2, EAC
pdf_DIN EN nach/acc
to DIN PN
pdf_Application range
page 2/30-33
pdf_Werkstoffbezeichnung Werkstoff-Nr
Eintritt Austritt bar/bar g
pdf_Ansprechdruck angeben
set pressure and if necessary, accessories.
pdf_Material Designation Material No
to 15/13 20/17,5
Manufacturer catalogue data, harvested 2026-08-15 09:18:58.
APIType 526
Set pressure(according to CE)
0,12 – 400 bar | 2 – 5.802 psig
Set pressure (according to ASME)
1 – 414 bar | 15 – 6.000 psig
Temperature(according to CE)
-270 – 550 °C | -454 – 1,022 °F
Temperature(according to ASME)
-268 – 538 °C | -450 – 1.000 °F
Connections DIN EN 1092
DN 25 - DN 200
Connections ASME B16.5
NPS 1 to NPS 8
Flange class Inlet DIN EN 1092
PN16 - PN400
Flange class Inlet ASME B16.5
Class 150 - Class 2500
Body material
1.0619, 1.4408, 1.7357 | SA 216 WCB, SA 351 CF8M, SA 217 WC6, SA 352 LCB, SA 351 CF3M, SA 995 Gr 4A CD3MN (Duplex), SA 494 M35-1 (Monel), SA 494 CX2MW (Hastelloy)
Narrowest flow diameter d₀
14 - 161.5 mm | 0.55 - 6.36 in
Narrowest flow area A₀
154 - 20.485 mm² | 0.239 - 31.75 in²
Bellows material (optional)
INCONEL® 625 LCF
Manufacturer catalogue data, harvested 2026-08-15 09:19:04.
Best Availability - Change-over valves
Pressure rating
PN16 - PN250 | Class 150 - Class 1500
Temperature
-273 - +450 °C | -459 - +842 °F
Connections DIN EN 1092
DN 25 to DN 400
Connections ASME B16.5
NPS 1 to NPS 16
Body material
Carbon steel , Stainless steel
pdf_Type 320 Flow
PN 10 – PN 250 / CL150 – CL1500
Pdf was created for the medium
The result is a low deviation
Pdf the set pressure
The AD regulations, however, references
Pdf pressure and size
1.4404 stellited 1.4404 stellited 1.4404 stellited
pdf_PN 160/CL900
PN 160/CL900:
pdf_PN 250/CL1500
PN 250/CL1500: -196°C/-321°F 400°C/752°F
pdf_Type DN Art
No. rating1) width
Pdf pressure e.g
by connecting a piping to
Manufacturer catalogue data, harvested 2026-08-15 09:19:10.
Best AvailabilityType 320 Flow
Temperature(according to CE)
-273 - +450 °C
Temperature (according to ASME)
-459 - +842 °F
Connections DIN EN 1092
DN 25 - DN 300
Connections ASME B16.5
NPS 1 to NPS 12
Flange class Inlet DIN EN 1092
PN 10 - PN 250
Flange class Inlet ASME B16.5
Class 150 - Class 1500
Body material
1.0619, 1.4408 | SA 216 WCB, SA 352 LCB, SA 351 CF8M
pdf_Type 320 Flow
PN 10 – PN 250 / CL150 – CL1500
Pdf was created for the medium
The result is a low deviation
Pdf the set pressure
The AD regulations, however, references
Pdf pressure and size
1.4404 stellited 1.4404 stellited 1.4404 stellited
pdf_PN 160/CL900
PN 160/CL900:
pdf_PN 250/CL1500
PN 250/CL1500: -196°C/-321°F 400°C/752°F
pdf_Type DN Art
No. rating1) width
Pdf pressure e.g
by connecting a piping to
Manufacturer catalogue data, harvested 2026-08-15 09:19:12.
Best AvailabilityType 330 Compact
Temperature(according to CE)
-273 - +450 °C
Temperature(according to ASME)
-459 - +842 °F
Connections DIN EN 1092
DN 25 - DN 400
Connections ASME B16.5
NPS 1 to NPS 16
Flange class Inlet DIN EN 1092
PN 10 - PN 40
Flange class Inlet ASME B16.5
Class 150 - Class 300
Body material
1.0619, 1.4408 | SA 216 WCB, SA 352 LCB, SA 351 CF8M
pdf_Type 320 Flow
PN 10 – PN 250 / CL150 – CL1500
Pdf was created for the medium
The result is a low deviation
Pdf the set pressure
The AD regulations, however, references
Pdf pressure and size
1.4404 stellited 1.4404 stellited 1.4404 stellited
pdf_PN 160/CL900
PN 160/CL900:
pdf_PN 250/CL1500
PN 250/CL1500: -196°C/-321°F 400°C/752°F
pdf_Type DN Art
No. rating1) width
Pdf pressure e.g
by connecting a piping to
Manufacturer catalogue data, harvested 2026-08-15 09:19:14.
Best Availability - Bursting disc
Set pressure
0.2 - 200 barg | 2.9 - 2,900 psig
Temperature
-30 - +550 °C | -22 - +1.022 °F
Connections DIN EN 1092
DN 25 to DN 400
Connections ASME B16.5
NPS 1 to NPS 16
Body material
Stainless steel, Hastelloy (brand name), Inconel (brand name), Alternative: Nickel based Materiale
Pdf by a special sealing edge
The space between the bursting disc and device" on page 01/04.
pdf_The pressure gauge connection (incl
sealing ring) is mounted on the
Pdf holder and the connection flanges
The IG-KUB two-piece holder is
pdf_available for flanges based on EN or ASME
Sealing surfaces and
Pdf temperature and the nominal diameter
Here is a list of possible examples of material combinations.
Pdf room temperature
50 100
Manufacturer catalogue data, harvested 2026-08-15 09:19:16.
Clean Service
Set pressure
0.1 - 68 barg | 1.5 - 986 psig
Temperature
-45 - 250 °C | -49 - 482 °F
Connections DIN EN 1092
Clamp, threaded and flange connections DN 15 to DN 100
Connections ASME B16.5
NPS 3/4 to NPS 4 1/2
Body material
Stainless steel
Manufacturer catalogue data, harvested 2026-08-15 09:19:22.
Clean ServiceType 481
Set pressure (according to CE)
0,1 – 68 bar | 1,5 – 986 psig
Set pressure (according to ASME)
1 – 68 bar | 15 – 986 psig
Temperature (according to CE)
-45 to 250 °C | -49 to 482 °F
Temperature(according to ASME)
-45 to 250 °C | -49 to 482 °F
Connections DIN/ISO
Clamp and threaded connections in the following sizes: DN 15 to DN 25
Connections ASME
Clamp and threaded connections in the following sizes: NPS 3/4 to NPS 1
Flange class Inlet DIN
PN16 - PN 68
Flange class Inlet ASME
Class 150 - Class 300
Body material
1.4404 | SA 479 316L
Narrowest flow diameter d₀
10 mm | 0.394 in
Narrowest flow area A₀
78.5 mm² | 0.122 in²
Manufacturer catalogue data, harvested 2026-08-15 09:19:24.
Clean ServiceType 483
Set pressure(according to CE)
0.1 - 16 bar | 1.5 - 232 psig
Set pressure(according to ASME)
1 – 16 bar | 15 – 232 psig
Temperature (according to CE)
-45 to 150 °C | -49 to 302 °F
Temperature(according to ASME)
-45 to 150 °C | -49 to 302 °F
Connections DIN EN
Clamp, threaded and flanged connections in the following sizes: DN 25 to DN 40
Connections ASME
Clamp, threaded and flanged connections in the following sizes: NPS 1 to NPS 2
Flange class Inlet DIN EN 1092
PN 16
Flange class Inlet ASME B16.5
Class 150
Body material
1.4435 | SA 479 316L
Bellows material
EPDM
Manufacturer catalogue data, harvested 2026-08-15 09:19:26.
Clean ServiceType 484
Set pressure(according to ASME)
1 – 16 bar | 15 – 232 psig
Set pressure(according to CE)
0.1 - 16 bar | 1.5 - 232 psig
Temperature(according to DIN EN)
-45 to 150 °C | -49 to 302 °F
Temperature(according to ASME)
-45 to 150 °C | -49 to 302 °F
Connections DIN EN
Container flange
Connections ASME
Container flange
Flange class Inlet DIN
PN 16
Flange class Inlet ASME
Class 150
Body material
1.4435 (BN2) | SA 479 316L
Narrowest flow diameter d₀
13 - 25 mm | 0.512 - 0.984 in
Narrowest flow area A₀
133 - 491 mm² | 0.206 - 0.761 in²
Bellows material
EPDM
Manufacturer catalogue data, harvested 2026-08-15 09:19:28.
Clean ServiceType 485
Set pressure(according to ASME)
1 – 16 bar | 15 – 232 psig
Set pressure(according to CE)
0.1 - 16 bar | 1.5 - 232 psig
Temperature(according to DIN EN)
-45 to 150 °C | -49 to 302 °F
Temperature(according to ASME)
-45 to 150 °C | -49 to 302 °F
Connections DIN/ISO
DN 25 - DN 50
Connections ASME
NPS 1 to NPS 2
Flange class Inlet DIN
PN 16
Flange class Inlet ASME
Class 150
Body material
1.4435 (BN2) | SA 479 316L
Narrowest flow diameter d₀
13 - 25 mm | 0.512 - 0.984 in
Narrowest flow area A₀
133 - 491 mm² | 0.206 - 0.761 in²
Bellows material
EPDM
Manufacturer catalogue data, harvested 2026-08-15 09:19:30.
Clean ServiceType 488
Set pressure(according to ASME)
1 – 16 bar | 15 – 232 psig
Set pressure(according to CE)
0.1 - 16 bar | 1.5 - 232 psig
Temperature(according to DIN EN)
-45 to 150 °C | -49 to 302 °F
Temperature (according to ASME)
-45 to 150 °C | -49 to 302 °F
Connections DIN EN
Clamp, threaded and flanged connections in the following sizes: DN 25 to DN 100
Connections ASME
Clamp, threaded and flanged connections in the following sizes: NPS 1 to NPS 4 1/2
Flange class Inlet DIN EN 1092
PN 16
Flange class Inlet ASME B16.5
Class 150
Body material
1.4404, 1.4435 | SA 479 316L
Narrowest flow diameter d₀
23 - 92 mm | 0.906 - 3.622 in
Narrowest flow area A₀
416 - 6648 mm² | 0.644 - 10.304 in²
Bellows material
EPDM
Manufacturer catalogue data, harvested 2026-08-15 09:19:32.
Compact Performance
Threaded connections
G/R: NPS 3/8 to NPS 1 1/2 NPT: NPS 1/2 to NPS 2
Flange connections DIN EN 1092
DN 15 to DN 25
Flange connections ASME B16.5
NPS 1/2 to NPS 1
Set pressure
0.1 bar - 850 bar | 1.5 - 12,328 psig
Temperature
-273 °C - 450 °C | -459 °F - 842 °F
Body material
Stainless steel, Carbon steel, Stainless steel casting
Manufacturer catalogue data, harvested 2026-08-15 09:19:34.
Compact PerformanceType 237 CC
Set pressure (according to ASME)
0.1 - 68 bar | 1.5 - 986 psig
Temperature(according to ASME)
-268 to 280 °C | -450 to 536 °F
Connections ASME B16.5
G 3/8 - G 1, NPT 1/2 to NPT 1 | ASME B16.5: NPS 1/2 to NPS 1
Flange class Inlet ASME B16.5
Class 150 - Class 2500
Body material
SA 4315 CF8M
Narrowest flow diameter d₀
10 mm | 0.394 in
Narrowest flow area A₀
78.5 mm² | 0.122 in²
Manufacturer catalogue data, harvested 2026-08-15 09:19:36.
Compact PerformanceType 237 IC
Set pressure (according to ASME)
0.1 - 180 bar | 1.5 - 2,610 psig
Temperature(according to ASME)
-196 to 427 °C | -321 to 800 °F
Connections DIN EN 1092
G/R: 3/8" to 1" | DIN EN 1092: DN 15 - DN 25
Connections ASME B16.5
NPT 1/2 to NPT 1 | ASME B16.5: NPS 1/2 to NPS 1
Flange class Inlet DIN EN 1092
PN 40 - PN 400
Flange class Inlet ASME B16.5
Class 150 - Class 2500
Body material
SA 4315 CF8M, SA 351 CF3M
Narrowest flow diameter d₀
10 mm | 0.394 in
Narrowest flow area A₀
78.5 mm² | 0.122 in²
Manufacturer catalogue data, harvested 2026-08-15 09:19:38.
Compact PerformanceType 437
Set pressure (according to ASME)
1 – 365 bar | 15 – 5.294 psig
Set pressure (according to CE)
0.1 - 365 bar | 1.5 - 5,294 psig
Temperature(according to ASME)
-268 – 400 °C | -450 – 752 °F
Temperature (according to CE)
-270 – 400 °C | -454 – 752 °F
Connections DIN EN 1092
G 3/8 – G 1 | R 3/8 – R 1 | DN 15 – DN 25
Connections ASME B16.5
NPT 1/2 – NPT 1 | NPS 1/2 – NPS 1
Flange class Inlet DIN EN 1092
PN 40 - PN 400
Flange class Inlet ASME B16.5
Class 150 - Class 2500
Body material
1.4104, 1.4404 | SA 479 430, SA 479 316L
Narrowest flow diameter d₀
6 - 10 mm | 0.236 - 0.394 in
Narrowest flow area A₀
28.3 - 78.5 mm² | 0.044 - 0.122 in²
Manufacturer catalogue data, harvested 2026-08-15 09:19:40.
Compact PerformanceType 438
Set pressure(according to ASME)
5 - 180 bar | 72.5 - 2610 psig
Set pressure(according to CE)
5 - 180 bar | 72.5 - 2610 psig
Temperature(according to ASME)
-45 – 240 °C | -49 – 464 °F
Temperature(according to CE)
-45 – 240 °C | -49 – 464 °F
Connections DIN EN 1092
G 3/8 – G 1 | R 3/8 – R 1 | DN 15 – DN 25
Connections ASME B16.5
NPT 1/2 – NPT 1 | NPS 1/2 – NPS 1
Flange class Inlet DIN EN 1092
PN 40 - PN 400
Flange class Inlet ASME B16.5
Class 150 - Class 2500
Body material
1.4104, 1.4404 | SA 479 430, SA 479 316L
Narrowest flow diameter d₀
10 mm | 0.394 in
Narrowest flow area A₀
78.5 mm² | 0.122 in²
Manufacturer catalogue data, harvested 2026-08-15 09:19:42.
Compact PerformanceType 439
Set pressure(according to ASME)
1 – 16 bar | 15 – 232 psig
Set pressure(according to CE)
0.1 - 16 bar | 1.5 - 232 psig
Temperature(according to ASME)
-45 – 240 °C | -49 – 464 °F
Temperature(according to CE)
-45 – 240 °C | -49 – 464 °F
Connections DIN EN 1092
G 3/8 – G 1 | R 3/8 – R 1 | DN 15 – DN 25
Connections ASME B16.5
NPT 1/2 – NPT 1 | NPS 1/2 – NPS 1
Flange class Inlet DIN EN 1092
PN 40 - PN 400
Flange class Inlet ASME B16.5
Class 150 - Class 2500
Body material
1.4104, 1.4404 | SA 479 430, SA 479 316L
Narrowest flow diameter d₀
10 mm | 0.394 in
Narrowest flow area A₀
78.5 mm² | 0.122 in²
Manufacturer catalogue data, harvested 2026-08-15 09:19:44.
Compact PerformanceType 459
Set pressure (according to ASME)
1 – 250 bar | 15 – 3.626 psig
Set pressure (according to CE)
0.2 - 250 bar | 2.9 - 3626 psig
Temperature (according to ASME)
-196 to 450 °C | -321 to 842 °F
Temperature (according to CE)
-273 – 450 °C | -459 – 842 °F
Connections DIN EN 1092
G 1/2 – G 1 1/2 | R 1/2 – R 1 1/2 | DN 15 – DN 25
Connections ASME B16.5
NPT 1/2 to NPT 2 NPS 1/2 to NPS 1
Flange class Inlet DIN EN 1092
PN 40 - PN 400
Flange class Inlet ASME B16.5
Class 150 - Class 2500
Body material
1.0619, 1.4408 | SA 216 WCB, SA 351 CF8M
Narrowest flow diameter d₀
9 - 17.5 mm | 0.354 - 0.689 in
Narrowest flow area A₀
63.6 - 241 mm² | 0.099 - 0.374 in²
Bellows material
Stainless steel
Manufacturer catalogue data, harvested 2026-08-15 09:19:46.
Compact PerformanceType 459 CC
Set pressure (according to ASME)
0.2 - 250 bar | 2.9 - 3,626 psig
Temperature (according to ASME)
-196 to 450 °C | -20 to 842 °F
Connections ASME B16.5
NPT 1/2 to NPT 1 1/2 | ASME B16.5: NPS 1/2 to NPS 1
Flange class Inlet ASME B16.5
Class 150 - Class 2500
Body material
SA 216 WCB, SA 351 CF8M
Narrowest flow diameter d₀
9 - 17.5 mm | 0.354 - 0.689 in
Narrowest flow area A₀
63.6 - 241 mm² | 0.099 - 0.374 in²
Bellows material
Stainless steel
Manufacturer catalogue data, harvested 2026-08-15 09:19:48.
Compact PerformanceType 459 HDD
Set pressure(according to ASME)
250 – 950 bar | 3.626 – 13780 psig
Set pressure(according to CE)
250 – 930 bar | 3.626 –13488,5 psig
Temperature(according to ASME)
-196 – 450 °C | -321 – 842 °F
Temperature(according to CE)
-273 – 400 °C | -459 – 752 °F
Connections DIN EN 1092
G 1/2 – G 1 | R 1/2 – R 1 | DN 15 – DN 25
Connections ASME B16.5
NPT 1/2 – NPT 1 | NPS 1/2 – NPS 1
Flange class Inlet DIN EN 1092
PN 320 - PN 400
Flange class Inlet ASME B16.5
Class 1500 - Class 2500
Body material
1.4408 | SA 351 CF8M
Narrowest flow diameter d₀
6 - 9 mm | 0.236 - 0.354 in
Narrowest flow area A₀
28.3 - 63.6 mm² | 0.044 - 0.099 in²
Bellows material
Stainless steel
Manufacturer catalogue data, harvested 2026-08-15 09:19:50.
Compact PerformanceType 459 IC
Set pressure (according to ASME)
0.2 - 650 bar | 2.9 - 9,425 psig
Temperature (according to ASME)
-196 to 538 °C | -321 to 1000 °F
Connections DIN EN 1092
G/R: NPS 1/2 to NPS 1 1/2 | DN 15 - DN 40
Connections ASME B16.5
NPT: NPS 1/2 to NPS 1 1/2 | NPS 1/2 to NPS 1 1/2
Flange class Inlet DIN EN 1092
PN 40 - PN 400
Flange class Inlet ASME B16.5
Class 150 - Class 2500
Body material
SA 216 WCB, SA 351 CF8M, SA 352 LCB, SA 351 CF3M, SA 995 Gr 4A CD3MN (Duplex), SA 494 M35-1 (Monel), SA 494 CX2MW (Hastelloy)
Narrowest flow diameter d₀
6 - 17.5 mm | 0.236 - 0.689 in
Narrowest flow area A₀
28.28 - 241 mm² | 0.044 - 0.374 in²
Bellows material
Stainless steel, INCONEL® 625 LCF
pdf_Pressure range
0.2 up to 850 barg
pdf_Flanged connection acc
to ASME B16.5 [CL 150, to CL
Pdf dimensions are possible
More information at sales@leser.com.
pdf_Medium Approval No
k
Pdf the soft seal manufacturer
LESER assumes on guarantee.
pdf_in the NACE standards
Ordering
pdf_ASME Sec
VIII. Also available with IBR and and liquid service. They have
Manufacturer catalogue data, harvested 2026-08-15 09:19:52.
Compact PerformanceType 462
Set pressure(according to ASME)
1 – 250 bar | 15 – 3.626 psig
Set pressure(according to CE)
0.5 - 250 bar | 7.3 - 3626 psig
Temperature(according to ASME)
-45 to 150 °C | -49 to 302 °F
Temperature(according to CE)
-45 to 150 °C | -49 to 302 °F
Connections DIN EN 1092
G 1/2 – G 1 1/2 | R 1/2 – R 1 1/2 | DN 15 – DN 25
Connections ASME B16.5
NPT 1/2 – NPT 2 | NPS 1/2 – NPS 1
Flange class Inlet DIN EN 1092
PN 40 - PN 400
Flange class Inlet ASME B16.5
Class 150 - Class 2500
Body material
1.0619, 1.4408 | SA 216 WCB, SA 351 CF8M
Narrowest flow diameter d₀
9 - 17.5 mm | 0.354 - 0.689 in
Narrowest flow area A₀
63.6 - 241 mm² | 0.099 - 0.374 in²
Bellows material
Stainless steel
Manufacturer catalogue data, harvested 2026-08-15 09:19:54.
Compact PerformanceType 462 HDD
Set pressure(according to ASME)
250 – 350 bar | 3.626 – 5.076 psig
Set pressure(according to CE)
250 – 350 bar | 3.626 – 5.076 psig
Temperature(according to ASME)
-45 to 150 °C | -49 to 302 °F
Temperature(according to CE)
-45 to 150 °C | -49 to 302 °F
Connections DIN EN 1092
G 1/2 – G 1 | R 1/2 – R 1 | DN 15 – DN 25
Connections ASME B16.5
NPT 1/2 – NPT 1 | NPS 1/2 – NPS 1
Flange class Inlet DIN EN 1092
PN 320 - PN 400
Flange class Inlet ASME B16.5
Class 1500 - Class 2500
Body material
1.0619, 1.4408 | SA 216 WCB, SA 351 CF8M
Narrowest flow diameter d₀
9 mm | 0.354 in
Narrowest flow area A₀
63.6 mm² | 0.099 in²
Bellows material
Stainless steel
Manufacturer catalogue data, harvested 2026-08-15 09:19:56.
Critical Service
Set pressure
0.1 - 16 barg | 1.45 - 232 psig
Temperature
-85 - 200 °C | -121 - 392 °F
Connections DIN EN 1092
DN 25 to DN 100
Connections ASME B16.5
NPS 1 to NPS 4
Body material
Carbon steel/PTFE
pdf_AQSIQ based on the approvals acc
to AD 2000-Merkblatt A2 cost-effective maintenance
Pdf materials
PFA
Pdf all directions in a pressure vessel
This strongly
Pdf nickel-based materials
Nickel-based alloys are used in LESER’s Type 526. The “LESER
pdf_Flange thickness is smaller (max
2 mm), see “Multiple pressure rating”.
pdf_Flange drilling as specified in standard
Flange thickness may be less than the flange outer diameter as specified.
pdf_Body material is certified acc
to 3.1 (EN 10204) for the following materials
pdf_DIN EN 10204-3.2
TÜV-Nord
pdf_Body material
1.0619 + virgin PTFE-TF (WCB + PTFE-TF)
pdf_Standard flange class
For other flange drillings, see page 31.
pdf_PED / Approval No
072020111Z0008/0/09
pdf_ASME Sec
VIII Approval No. M37123
pdf_Approval No
M37134
pdf_CRN Approval No
For current approval no. see www.leser.com
pdf_AQSIQ Approval No
For current approval no. see www.leser.com
pdf_EAC Approval No
For current approval no. see www.leser.com
pdf_PED/DIN EN ISO 4126-1 Approval no
072020111Z0008/0/19
pdf_PED/AD 2000-Merkblatt A2 Approval no
TÜV SV 496
pdf_AQSIQ Approval no
For current approval no. see www.leser.com
pdf_EAC Approval no
For current approval no. see www.leser.com
Pdf dimensions
Please use the “Specification Sheet” on page 59
pdf_Special material e.g
Hastelloy® –
pdf_Water resistance as per ISO 719-HGB
1 Density (at 25 °C): 2,23 g/cm3
pdf_Water resistance as per ISO 719-HGA
1 Elasticity module: 63 kN/mm2
pdf_Acidity class as per ISO 1776
1 480
Manufacturer catalogue data, harvested 2026-08-15 09:19:58.
Critical ServiceType 447
Set pressure (according to CE)
0,1 – 16 bar | 1,5 – 232 psig
Set pressure (according to ASME)
1 – 16 bar | 15 – 232 psig´
Temperature (according to CE)
-85 to 200 °C | -121 to 392 °F
Temperature (according to ASME)
-29 to 200 °C | -20 to 392 °F
Connections DIN EN 1092
DN 25 - DN 100
Connections ASME B16.5
NPS 1 - NPS 4
Flange class Inlet DIN EN 1092
PN 10 - PN 16
Flange class Inlet ASME B16.5
Class 150
Body material
1.0619 + PTFE | SA 216 WCB + PTFE
Narrowest flow diameter d₀
23 - 92 mm | 0.91 - 3.62 in
Narrowest flow area A₀
416 - 6648 mm² | 0.645 - 10.304 in²
Bellows material
PTFE-TFM
pdf_AQSIQ based on the approvals acc
to AD 2000-Merkblatt A2 cost-effective maintenance
Pdf materials
PFA
Pdf all directions in a pressure vessel
This strongly
Pdf nickel-based materials
Nickel-based alloys are used in LESER’s Type 526. The “LESER
pdf_Flange thickness is smaller (max
2 mm), see “Multiple pressure rating”.
pdf_Flange drilling as specified in standard
Flange thickness may be less than the flange outer diameter as specified.
pdf_Body material is certified acc
to 3.1 (EN 10204) for the following materials
pdf_DIN EN 10204-3.2
TÜV-Nord
pdf_Body material
1.0619 + virgin PTFE-TF (WCB + PTFE-TF)
pdf_Standard flange class
For other flange drillings, see page 31.
pdf_PED / Approval No
072020111Z0008/0/09
pdf_ASME Sec
VIII Approval No. M37123
pdf_Approval No
M37134
pdf_CRN Approval No
For current approval no. see www.leser.com
pdf_AQSIQ Approval No
For current approval no. see www.leser.com
pdf_EAC Approval No
For current approval no. see www.leser.com
pdf_PED/DIN EN ISO 4126-1 Approval no
072020111Z0008/0/19
pdf_PED/AD 2000-Merkblatt A2 Approval no
TÜV SV 496
pdf_AQSIQ Approval no
For current approval no. see www.leser.com
pdf_EAC Approval no
For current approval no. see www.leser.com
Pdf dimensions
Please use the “Specification Sheet” on page 59
pdf_Special material e.g
Hastelloy® –
pdf_Water resistance as per ISO 719-HGB
1 Density (at 25 °C): 2,23 g/cm3
pdf_Water resistance as per ISO 719-HGA
1 Elasticity module: 63 kN/mm2
pdf_Acidity class as per ISO 1776
1 480
Manufacturer catalogue data, harvested 2026-08-15 09:20:00.
Critical ServiceType 447B
Set pressure (according to CE)
0,1 – 16 bar | 1,5 – 232 psig
Set pressure (according to ASME)
1 – 16 bar | 15 – 232 psig
Temperature (according to CE)
-85 to 200 °C | -121 to 392 °F
Temperature (according to ASME)
-29 to 200 °C | -20 to 392 °F
Connections DIN EN 1092
DN 25 - DN 100
Connections ASME B16.5
NPS 1 - NPS 4
Flange class Inlet DIN EN 1092
PN 10 - PN 16
Flange class Inlet ASME B16.5
Class 150
Body material
1.0619 + PTFE | SA 216 WCB + Virginal PTFE with conductive pigments
Narrowest flow diameter d₀
23 - 92 mm | 0.91 - 3.62 in
Narrowest flow area A₀
416 - 6648 mm² | 0.645 - 10.304 in²
Bellows material
PTFE-TFM with conductive pigments
pdf_AQSIQ based on the approvals acc
to AD 2000-Merkblatt A2 cost-effective maintenance
Pdf materials
PFA
Pdf all directions in a pressure vessel
This strongly
Pdf nickel-based materials
Nickel-based alloys are used in LESER’s Type 526. The “LESER
pdf_Flange thickness is smaller (max
2 mm), see “Multiple pressure rating”.
pdf_Flange drilling as specified in standard
Flange thickness may be less than the flange outer diameter as specified.
pdf_Body material is certified acc
to 3.1 (EN 10204) for the following materials
pdf_DIN EN 10204-3.2
TÜV-Nord
pdf_Body material
1.0619 + virgin PTFE-TF (WCB + PTFE-TF)
pdf_Standard flange class
For other flange drillings, see page 31.
pdf_PED / Approval No
072020111Z0008/0/09
pdf_ASME Sec
VIII Approval No. M37123
pdf_Approval No
M37134
pdf_CRN Approval No
For current approval no. see www.leser.com
pdf_AQSIQ Approval No
For current approval no. see www.leser.com
pdf_EAC Approval No
For current approval no. see www.leser.com
pdf_PED/DIN EN ISO 4126-1 Approval no
072020111Z0008/0/19
pdf_PED/AD 2000-Merkblatt A2 Approval no
TÜV SV 496
pdf_AQSIQ Approval no
For current approval no. see www.leser.com
pdf_EAC Approval no
For current approval no. see www.leser.com
Pdf dimensions
Please use the “Specification Sheet” on page 59
pdf_Special material e.g
Hastelloy® –
pdf_Water resistance as per ISO 719-HGB
1 Density (at 25 °C): 2,23 g/cm3
pdf_Water resistance as per ISO 719-HGA
1 Elasticity module: 63 kN/mm2
pdf_Acidity class as per ISO 1776
1 480
Manufacturer catalogue data, harvested 2026-08-15 09:20:04.
High Efficiency - Supplementary loading system
Set pressure
0.1 - 250 barg | 1.5 - 3626 psig
Temperature
-40 - 550 °C | -40 - 1,022 °F
Connections DIN EN 1092
DN 25 to DN 400
Connections ASME B16.5
NPS 3/4 to NPS 16
Body material
Gray cast iron, nodular cast iron, carbon steel , high-temperature carbon steel , stainless cast steel
pdf_Overpressure Max
3 % ASME I <1%
Manufacturer catalogue data, harvested 2026-08-15 09:20:08.
High EfficiencyType 712
Set pressure(according to CE)
0.1 - 250 barg | 1.5 - 3.626 psig
Set pressure (according to ASME)
0.1 - 250 barg | 1.5 - 3.626 psig
Temperature(according to CE)
-40 - 550 °C | -40 - 1,022 °F
Temperature(according to ASME)
-40 - 538 °C | -40 - 1,000 °F
Connections DIN EN 1092
DN 25 - DN 400
Connections ASME B16.5
NPS 1 to NPS 16
Flange class Inlet DIN EN 1092
PN 10 - PN 400
Flange class Inlet ASME B16.5
Class 150 - Class 2500
Body material
0.6025, 0.7043, 1.0619, 1.4408, 1.7357 | Gr. 60-40-18, SA 216 WCB, SA 351 CF8M, SA 217 WC6, SA 352 LCB, SA 351 CF3M, SA 995 Gr 4A CD3MN (Duplex), SA 494 M35-1 (Monel), SA 494 CX2MW (Hastelloy)
Narrowest flow diameter d₀
14 - 295 mm | 0.55 - 11.61 in
Narrowest flow area A₀
154 - 68347 mm² | 0.239 - 105.938 in²
Bellows material
Stainless steel , INCONEL® 625LCF
pdf_Overpressure Max
3 % ASME I <1%
Manufacturer catalogue data, harvested 2026-08-15 09:20:10.
High EfficiencyType 714
Set pressure(according to CE)
0,1 - 200 barg | 1,5 - 2.900 psig
Set pressure (according to ASME)
0,1 - 250 barg | 1,5 - 2.900 psig
Temperature(according to CE)
-40 - 550 °C | -40 - 1,022 °F
Temperature(according to ASME)
-40 - 550 °C | -40 - 1,000 °F
Connections DIN EN 1092
DN 25 - DN 400
Connections ASME B16.5
NPS 1 to NPS 16
Flange class Inlet DIN EN 1092
PN 10 - PN 400
Flange class Inlet ASME B16.5
Class 150 - Class 2500
Body material
0.6025, 0.7043, 1.0619, 1.4408, 1.7357 | Gr. 60-40-18, SA 216 WCB, SA 351 CF8M, SA 217 WC6, SA 352 LCB, SA 351 CF3M, SA 995 Gr 4A CD3MN (Duplex), SA 494 M35-1 (Monel), SA 494 CX2MW (Hastelloy)
Narrowest flow diameter d₀
14 - 295 mm | 0.55 - 11.61 in
Narrowest flow area A₀
154 - 68347 mm² | 0.239 - 105.938 in²
Bellows material
Stainless steel , INCONEL® 625LCF
pdf_Overpressure Max
3 % ASME I <1%
Manufacturer catalogue data, harvested 2026-08-15 09:20:12.
High Efficiency - Pilot-Operated Safety Valves
Set pressure
1,0 - 650,0 barg | 15,0 - 9427,0 psig
Temperature
-162 - 320 °C | -260 - 608 °F
Connections DIN EN 1092
DN 25 to DN 200
Connections ASME B16.5
NPS 1 to NPS 8
Body material
Carbon steel , Stainless steel
Pdf a back pressure ratio (i.e
a ratio of back pressure /
Pdf range can be broadly divided into
the products providing added control the High Efficiency
Pdf on the operating pressure range
For details on these
Pdf ranges to ensure maximum tightness
Generally, at lower shows which sealing is used as a standard.
Pdf main valve) via the pressure pickup
The pilot valve then be described as follows. During operation, the POSV
Pdf in dome pressure
Also, the dome is vented. As a result,
Pdf codes and standards
LESER sets the blowdown in the
Pdf tional state medium does not flow
The closing force of
Pdf exhaust seat and closes the feeding seat
This releases
Pdf the dome pressure
The release of dome pressure is
Pdf pressure to the dome of the main valve
Here, the sys-
Pdf pressure range using an adjustment screw
On reaching
Pdf cific parts and dimensions (e.g
the mounting of the
Pdf closes the dome feeding seat
This keeps the dome pres-
Pdf and at different pressure levels
To change the lift, there
pdf_Body material
WCB 1.0619
pdf_Screw Dimensions acc
to DIN EN 1092-1
Pdf external test medium
the medium from the of the pilot. valve piston.
Pdf pressure shall be tested
This allows a quick and simple
pdf_Connection size
G 1/2 male and NPT 1/4" female Nitrogen
pdf_Housing material
316L / 1.4404
Pdf when the medium tends to block the piston
Manual blow-
Pdf excessive pressure loss may occur
This can lead to chat- pressure drop.
Pdf material
Spring (54) of Series 820 is not affected by the
Pdf as a standard material
To order the NACE compliant
Manufacturer catalogue data, harvested 2026-08-15 09:20:14.
High EfficiencyType 811
Set pressure(according to CE)
2,5 - 255,5 bar | 36,0 - 3705,0 psig
Set pressure (according to ASME)
2,5 - 255,5 bar | 36,0 - 3705,0 psig
Temperature(according to CE)
-162 - 300 °C | -260 – 572 °F
Temperature(according to ASME)
-162 - 300 °C | -260 – 572 °F
Connections DIN EN 1092
DN 25 - DN 200
Connections ASME B16.5
NPS 1 to NPS 8
Flange class Inlet DIN EN 1092
PN 10 - PN 250
Flange class Inlet ASME B16.5
Class 150 - Class 1500
Body material
1.0619, 1.4408 | SA 216 WCB, SA 351 CF8M, SA 217 WC6, SA 352 LCB, SA 351 CF3M, SA 995 Gr 4A CD3MN (Duplex), SA 494 M35-1 (Monel), SA 494 CX2MW (Hastelloy)
Narrowest flow diameter d₀
11 - 180 mm | 0.433 - 7.087 in
Narrowest flow area A₀
95 - 25,446.9 mm² | 0,147 – 39,443 in²
Pdf a back pressure ratio (i.e
a ratio of back pressure /
Pdf range can be broadly divided into
the products providing added control the High Efficiency
Pdf on the operating pressure range
For details on these
Pdf ranges to ensure maximum tightness
Generally, at lower shows which sealing is used as a standard.
Pdf main valve) via the pressure pickup
The pilot valve then be described as follows. During operation, the POSV
Pdf in dome pressure
Also, the dome is vented. As a result,
Pdf codes and standards
LESER sets the blowdown in the
Pdf tional state medium does not flow
The closing force of
Pdf exhaust seat and closes the feeding seat
This releases
Pdf the dome pressure
The release of dome pressure is
Pdf pressure to the dome of the main valve
Here, the sys-
Pdf pressure range using an adjustment screw
On reaching
Pdf cific parts and dimensions (e.g
the mounting of the
Pdf closes the dome feeding seat
This keeps the dome pres-
Pdf and at different pressure levels
To change the lift, there
pdf_Body material
WCB 1.0619
pdf_Screw Dimensions acc
to DIN EN 1092-1
Pdf external test medium
the medium from the of the pilot. valve piston.
Pdf pressure shall be tested
This allows a quick and simple
pdf_Connection size
G 1/2 male and NPT 1/4" female Nitrogen
pdf_Housing material
316L / 1.4404
Pdf when the medium tends to block the piston
Manual blow-
Pdf excessive pressure loss may occur
This can lead to chat- pressure drop.
Pdf material
Spring (54) of Series 820 is not affected by the
Pdf as a standard material
To order the NACE compliant
Manufacturer catalogue data, harvested 2026-08-15 09:20:16.
High EfficiencyType 821
Set pressure(according to CE)
1,0 - 425,4 bar | 15,0 - 6170,0 psig
Set pressure (according to ASME)
1,0 - 650,0 bar | 15,0 - 9427,0 psig
Temperature(according to CE)
-162 - 320 °C | -260 – 608 °F
Temperature(according to ASME)
-162 - 320 °C | -260 – 608 °F
Connections DIN EN 1092
DN 25 - DN 200
Connections ASME B16.5
NPS 1 to NPS 8
Flange class Inlet DIN EN 1092
PN 10 - PN 400
Flange class Inlet ASME B16.5
Class 150 - Class 2500
Body material
1.0619, 1.4408 | SA 216 WCB, SA 351 CF8M, SA 352 LCB, SA 351 CF3M, SA 995 Gr 4A CD3MN (Duplex), SA 494 M35-1 (Monel), SA 494 CX2MW (Hastelloy)
Narrowest flow diameter d₀
11 - 180 mm | 0.433 - 7.087 in
Narrowest flow area A₀
95 - 25,446.9 mm² | 0.147 - 39.443 in²
Pdf a back pressure ratio (i.e
a ratio of back pressure /
Pdf range can be broadly divided into
the products providing added control the High Efficiency
Pdf on the operating pressure range
For details on these
Pdf ranges to ensure maximum tightness
Generally, at lower shows which sealing is used as a standard.
Pdf main valve) via the pressure pickup
The pilot valve then be described as follows. During operation, the POSV
Pdf in dome pressure
Also, the dome is vented. As a result,
Pdf codes and standards
LESER sets the blowdown in the
Pdf tional state medium does not flow
The closing force of
Pdf exhaust seat and closes the feeding seat
This releases
Pdf the dome pressure
The release of dome pressure is
Pdf pressure to the dome of the main valve
Here, the sys-
Pdf pressure range using an adjustment screw
On reaching
Pdf cific parts and dimensions (e.g
the mounting of the
Pdf closes the dome feeding seat
This keeps the dome pres-
Pdf and at different pressure levels
To change the lift, there
pdf_Body material
WCB 1.0619
pdf_Screw Dimensions acc
to DIN EN 1092-1
Pdf external test medium
the medium from the of the pilot. valve piston.
Pdf pressure shall be tested
This allows a quick and simple
pdf_Connection size
G 1/2 male and NPT 1/4" female Nitrogen
pdf_Housing material
316L / 1.4404
Pdf when the medium tends to block the piston
Manual blow-
Pdf excessive pressure loss may occur
This can lead to chat- pressure drop.
Pdf material
Spring (54) of Series 820 is not affected by the
Pdf as a standard material
To order the NACE compliant
Manufacturer catalogue data, harvested 2026-08-15 09:20:20.
High PerformanceType 441, 442 ANSI
Set pressure(according to CE)
0,1 – 49 bar | 1,5 – 710 psig
Set pressure (according to ASME)
1 – 49,3 bar | 15 – 715 psig
Temperature(according to CE)
-270 – 450 °C | -454 – 842 °F
Temperature(according to ASME)
-268 – 538 °C | -450 – 1.000 °F
Connections ASME B16.5
NPS 3/4 to NPS 16
Flange class Inlet DIN EN 1092
PN 10 - PN 40
Flange class Inlet ASME B16.5
Class 150 - Class 300
Body material
1.0619, 1.4408 | SA 216 WCB, SA 351 CF8M
Narrowest flow diameter d₀
23 - 295 mm | 0.91 - 11.61 in
Narrowest flow area A₀
416 - 68,347 mm² | 0.644 - 105.938 in²
Bellows material
Stainless steel and elastomer
Manufacturer catalogue data, harvested 2026-08-15 09:31:23.
High PerformanceType 441 442 DIN
Set pressure(according to CE)
0,1 – 40 bar | 1,5 – 580 psig
Set pressure (according to ASME)
1 – 40 bar | 15 – 580 psig
Temperature(according to CE)
-270 – 450 °C | -454 – 842 °F
Temperature(according to ASME)
-268 – 538 °C | -450 – 1.000 °F
Connections DIN EN 1092
DN 20 to DN 400
Connections ASME B16.5
NPS 3/4 to NPS 16
Flange class Inlet DIN EN 1092
PN 10 - PN 40
Flange class Inlet ASME B16.5
Class 150 - Class 300
Body material
0.6025, 0.7043, 1.0619, 1.4408 | Gr. 60-40-18, SA 216 WCB, SA 351 CF8M
Narrowest flow diameter d₀
18 - 295 mm | 0.71 - 11.61 in
Narrowest flow area A₀
254 - 6.8347 mm² | 0.394 - 105.938 in²
Bellows material
Stainless steel and elastomer
Manufacturer catalogue data, harvested 2026-08-15 09:31:24.
High PerformanceType 441, 442 Full nozzle ANSI
Set pressure(according to CE)
0.1 - 49 bar | 1.5 - 710 psig
Set pressure (according to ASME)
1 – 49,3 bar | 15 – 715 psig
Temperature(according to CE)
-270 – 450 °C | -454 – 842 °F
Temperature(according to ASME)
-268 – 538 °C | -450 – 1.000 °F
Connections DIN EN 1092
DN 25 to DN 100
Connections ASME B16.5
NPS1 to NPS 4
Flange class Inlet DIN EN 1092
PN 10 - PN 40
Flange class Inlet ASME B16.5
Class 150 - Class 300
Body material
1.0619, 1.4408 | SA 216 WCB, SA 351 CF8M
Narrowest flow diameter d₀
23 - 92 mm | 0.91 - 3.62 in
Narrowest flow area A₀
416 - 6,648 mm² | 0.644 - 10.304 in²
Bellows material
Stainless steel and elastomer
Manufacturer catalogue data, harvested 2026-08-15 09:31:26.
High PerformanceType 441, 442 Full nozzle DIN
Set pressure(according to CE)
0,1 – 40 bar | 1,5 – 580 psig
Set pressure (according to ASME)
1 – 40 bar | 15 – 580 psig
Temperature(according to CE)
-270 – 450 °C | -454 – 842 °F
Temperature(according to ASME)
-268 – 538 °C | -450 – 1.000 °F
Connections DIN EN 1092
DN 25 to DN 50
Connections ASME B16.5
NPS 1 to NPS 2
Flange class Inlet DIN EN 1092
PN 10 - PN 40
Flange class Inlet ASME B16.5
Class 150
Body material
1.0619, 1.4408 | SA 216 WCB, SA 351 CF8M
Narrowest flow diameter d₀
23 - 46 mm | 0.91 - 1.81 in
Narrowest flow area A₀
416 - 1.662 mm² | 0.644 - 2.576 in²
Bellows material
Stainless steel and elastomer
Manufacturer catalogue data, harvested 2026-08-15 09:31:28.
High PerformanceType 441 CC
Set pressure (according to ASME)
0.5 - 40 barg | 7.2 - 580 psig
Temperature(according to ASME)
-85 to 450 °C | -121 to 842 °F
Connections DIN EN 1092
DN 20 - DN 100
Connections ASME B16.5
NPS 3/4 - NPS 4
Flange class Inlet DIN EN 1092
PN 16 - PN 40
Flange class Inlet ASME B16.5
Class 150 - Class 300
Body material
0.7043, 1.0619
Flow diameter d₀
18 - 92 mm | 0.71 - 3.62 in
Flow area A₀
254 - 6648 mm² | 0.394 - 10.304 in²
Seat seal
Metallic
Manufacturer catalogue data, harvested 2026-08-15 09:31:29.
High PerformanceType 441 IC
Set pressure (according to ASME)
0.1 - 40 barg | 15 - 580 psig
Temperature(according to ASME)
-196 to 538 °C |-321 to 1000 °F
Connections DIN EN 1092
DN 25 - DN 200
Connections ASME B16.5
NPS 1 - NPS 12
Flange class Inlet DIN EN 1092
PN 10 - PN 40
Flange class Inlet ASME B16.5
Class 150 - Class 600
Body material
SA 216 WCB, SA 351 CF8M, SA 351 CF8, SA 217 WC6, SA 352 LCB, SA 351 CF3, SA 351 CF3M, SA 995 Gr 4A CD3MN (Duplex), SA 494 M35-1 (Monel), SA 494 CX2MW (Hastelloy)
Flow diameter d₀
23 - 165 mm | 0.906 - 6.496 in
Flow area A₀
416 - 21385 mm² | 0.644 - 33.147 in²
Faltenbalgwerkstoff (optional)
Stainless steel
Seat seal
Metallic, Soft Sealing
pdf_Calculation of mass flow acc
to IBR 1950
Pdf pressure
It can be used for back pressure up to a maximum of 35% of the set pressure. The
pdf_Set pressure
3.0 bar minimum
pdf_with API 526 standard
Type tested valve with flanged and threaded
pdf_and certified by ASME
Available connections. Type tested and certified
Pdf connections
Type rested and certified 1” to 4” inlet, flanged to 150#. Type
pdf_by ASME
Available with “UV” stamp. tested and certified by ASME. Available
Manufacturer catalogue data, harvested 2026-08-15 09:31:32.
High PerformanceType 444 ANSI
Set pressure (according to CE)
0.1 - 16 bar | 1.5 - 232 psig
Set pressure (according to ASME)
1 - 16 bar | 15 - 232 psig
Temperature (according to CE)
-45 to 200 °C | -49 to 392 °F
Temperature (according to ASME)
-45 to 200 °C | -49 to 392 °F
Connections ASME B16.5
NPS 1 to NPS 3
Flange class Inlet ASME B16.5
Class 150
Body material
1.4404 | SA 479 316L
Narrowest flow diameter d₀
23 - 74 mm | 0.91 - 2.91 in
Narrowest flow area A₀
416 - 4,301 mm² | 0.644 - 6.666 in²
Bellows material
No Bellows available
Manufacturer catalogue data, harvested 2026-08-15 09:31:33.
High PerformanceType 444 DIN
Set pressure(according to CE)
0.1 - 16 bar | 1.5 - 232 psig
Set pressure (according to ASME)
1 - 16 bar | 15 - 232 psig
Temperature(according to CE)
-45 to 200 °C | -49 to 392 °F
Temperature(according to ASME)
-45 to 200 °C | -49 to 392 °F
Connections DIN EN 1092
DN 25 - DN 80
Flange class Inlet DIN EN 1092
PN 16
Body material
1.4404 | SA 479 316L
Narrowest flow diameter d₀
23 - 74 mm | 0.91 - 2.91 in
Narrowest flow area A₀
416 - 4,301 mm² | 0.644 - 6.666 in²
Bellows material
No Bellows available
Manufacturer catalogue data, harvested 2026-08-15 09:31:37.
High PerformanceType 455, 456
Set pressure(according to CE)
2.5 - 100 bar | 36 - 1,450 psig
Set pressure (according to ASME)
2.5 - 100 bar | 35- 1,450 psig
Temperature(according to CE)
-85 to 550 °C | -121 to 1,022 °F
Temperature(according to ASME)
-29 to 538 °C | -20 to 1,000 °F
Connections DIN EN 1092
DN 25 - DN 100
Connections ASME B16.5
NPS 1 to NPS 4
Flange class Inlet DIN EN 1092
PN 63 - PN 160
Flange class Inlet ASME B16.5
Class 150 - Class 1500
Body material
1.0619, 1.4581, 1.7357 | SA 216 WCB, SA 351 CF10M, SA 217 WC6
Narrowest flow diameter d₀
20 - 74 mm | 0.79 - 2.91 in
Narrowest flow area A₀
314 - 4.301 mm² | 0.487 - 6.666 in²
Bellows material
Stainless steel
Manufacturer catalogue data, harvested 2026-08-15 09:31:37.
High PerformanceType 457, 458
Set pressure(according to CE)
2.5 - 300 bar | 36 - 4,350 psig
Set pressure (according to ASME)
2.5 - 300 bar | 35 - 4,350 psig
Temperature(according to CE)
-85 to 550 °C | -121 to 1,022 °F
Temperature(according to ASME)
-29 to 538 °C | -20 to 1,000 °F
Connections DIN EN 1092
DN 25 - DN 150
Connections ASME B16.5
NPS 1 to NPS 6
Flange class Inlet DIN EN 1092
PN 16 - PN 250
Flange class Inlet ASME B16.5
Class 150 - Class 1500
Body material
1.0619, 1.4581, 1.7357 | SA 216 WCB, SA 351 CF10M, SA 217 WC6
Narrowest flow diameter d₀
15 - 110 mm | 0.59 - 4.33 in
Narrowest flow area A₀
177 - 9,503 mm² | 0.274 - 14.730 in²
Bellows material
Stainless steel
Manufacturer catalogue data, harvested 2026-08-15 09:31:39.
Modulate Action
Set pressure
0.2 - 160 barg | 2.9 - 2,320.6 psig
Temperature
-270 - 450 °C | -454 - 842 °F
Connections DIN EN 1092
DN 15 to DN 150
Connections ASME B16.5
NPS 1/2 to NPS 6
Body material
Grey cast iron, nodular cast iron, carbon steel, stainless cast steel
pdf_Flange thickness is smaller (max
2 mm), see “Multiple pressure rating”
pdf_Flange drilling as specified in standard
Flange thickness may be less than the flange outer diameter as specified
pdf_Body material is certified acc
to 3.1 (EN 10204) for the following materials
pdf_Body material
0.6025 (cast iron)
pdf_Standard flange class
For other flange drillings, refer to page 18.
Pdf approval-no
072020111Z0008/0/06
pdf_Height (H4) Standard H max
307
pdf_PN 40 acc
to DIN EN 1092 in µm
Pdf pressure
in systems with multiple safety valves
Pdf the nanometer range
valve on site.
Pdf nozzles can be stellited by weld cladding
Stellite is a cobalt- with highly stressed sealing surfaces
Pdf seal manufacturer
LESER assumes no guarantee.
Pdf rules and regulations and standards
Through a special design,
pdf_Type DIN EN 60947-5-6 (NAMUR)
The indicators are approved for
Manufacturer catalogue data, harvested 2026-08-15 09:31:42.
Modulate ActionType 431, 433
Set pressure (according to CE)
0,2 – 40 bar | 2,9 – 580 psig
Temperature (according to CE)
-270 to 450 °C | -454 to 842 °F
Connections DIN EN 1092
DN 15 - DN 150
Connections ASME B16.5
NPS 1/2 - NPS 6
Flange class Inlet DIN EN 1092
PN 16 - PN 40
Flange class Inlet ASME B16.5
Class 150 - Class 300
Body material
0.6025, 0.7043, 1.0619, 1.4408 | Gr. 60-40-18, SA 216 WCB, SA 351 CF8M
Narrowest flow diameter d₀
12 - 92 mm | 0.47 - 3.62 in
Narrowest flow area A₀
113 – 6.648 mm² | 0,175 – 10,304 in²
Bellows material (optional)
Stainless steel and elastomer
pdf_Flange thickness is smaller (max
2 mm), see “Multiple pressure rating”
pdf_Flange drilling as specified in standard
Flange thickness may be less than the flange outer diameter as specified
pdf_Body material is certified acc
to 3.1 (EN 10204) for the following materials
pdf_Body material
0.6025 (cast iron)
pdf_Standard flange class
For other flange drillings, refer to page 18.
Pdf approval-no
072020111Z0008/0/06
pdf_Height (H4) Standard H max
307
pdf_PN 40 acc
to DIN EN 1092 in µm
Pdf pressure
in systems with multiple safety valves
Pdf the nanometer range
valve on site.
Pdf nozzles can be stellited by weld cladding
Stellite is a cobalt- with highly stressed sealing surfaces
Pdf seal manufacturer
LESER assumes no guarantee.
Pdf rules and regulations and standards
Through a special design,
pdf_Type DIN EN 60947-5-6 (NAMUR)
The indicators are approved for
Manufacturer catalogue data, harvested 2026-08-15 09:31:59.
Modulate ActionType 431, 433 PN 160
Set pressure (according to CE)
0,3 – 160 bar | 4,35 – 2.321 psig
Temperature (according to CE)
-270 to 450 °C | -454 to 842 °F
Connections DIN EN 1092
DN 15
Connections ASME B16.5
NPS 1/2
Flange class Inlet DIN EN 1092
PN 63 - PN 160
Flange class Inlet ASME B16.5
Class 300 - Class 600
Body material
1.0619, 1.4408 | SA 216 WCB, SA 351 CF8M
Narrowest flow diameter d₀
12 mm | 0.47 in
Narrowest flow area A₀
113 mm² | 0.175 in²
Bellows material (optional)
Stainless steel
pdf_Flange thickness is smaller (max
2 mm), see “Multiple pressure rating”
pdf_Flange drilling as specified in standard
Flange thickness may be less than the flange outer diameter as specified
pdf_Body material is certified acc
to 3.1 (EN 10204) for the following materials
pdf_Body material
0.6025 (cast iron)
pdf_Standard flange class
For other flange drillings, refer to page 18.
Pdf approval-no
072020111Z0008/0/06
pdf_Height (H4) Standard H max
307
pdf_PN 40 acc
to DIN EN 1092 in µm
Pdf pressure
in systems with multiple safety valves
Pdf the nanometer range
valve on site.
Pdf nozzles can be stellited by weld cladding
Stellite is a cobalt- with highly stressed sealing surfaces
Pdf seal manufacturer
LESER assumes no guarantee.
Pdf rules and regulations and standards
Through a special design,
pdf_Type DIN EN 60947-5-6 (NAMUR)
The indicators are approved for
Manufacturer catalogue data, harvested 2026-08-15 09:31:59.
S&RType 424
Set pressure (according to CE)
0.5 - 1 bar | 7.2 - 14.5 psig
Temperature (according to CE)
up to 120 °C | up to 248 °F
Connections DIN EN 1092
DN 25 - DN 150 | NPS 1 - NPS 6
Flange class DIN EN 1092
PN 16
Body material
0.6025 | Cast iron
Narrowest flow diameter d₀
23 - 125 mm | 0.98 - 4.92 in
Narrowest flow area A₀
416 - 12272 mm² | 0.65 - 19 in²
Bellows material
EPDM
pdf_DIN EN nach/acc
to DIN PN
pdf_Application range
page 2/30-33
pdf_Werkstoffbezeichnung Werkstoff-Nr
Eintritt Austritt bar/bar g
pdf_Ansprechdruck angeben
set pressure and if necessary, accessories.
pdf_Material Designation Material No
to 15/13 20/17,5
Manufacturer catalogue data, harvested 2026-08-15 09:32:37.
S&RType 440
Set pressure (according to CE)
1 - 10 bar | 14.5 - 145 psig
Temperature (according to CE)
up to 120 °C | up to 248 °F
Connections DIN EN 1092
DN 20 - DN 150 | NPS 3/4 - NPS 6
Flange class DIN EN 1092
PN 16
Body material
0.7043, 1.0619 | gray cast iron, Gr. 60-40-18
Narrowest flow diameter d₀
18 - 125 mm | 0.71 - 4.92 in
Narrowest flow area A₀
254 - 12272 mm² | 0.27 - 19.02 in²
Bellows material
EPDM
pdf_DIN EN nach/acc
to DIN PN
pdf_Application range
page 2/30-33
pdf_Werkstoffbezeichnung Werkstoff-Nr
Eintritt Austritt bar/bar g
pdf_Ansprechdruck angeben
set pressure and if necessary, accessories.
pdf_Material Designation Material No
to 15/13 20/17,5
Manufacturer catalogue data, harvested 2026-08-15 09:32:37.
S&RType 460
Set pressure (according to CE)
1 - 10 bar | 14.5 - 145 psig
Temperature (according to CE)
up to 120 °C | up to 248 °F
Connections
DN 15 - DN 20 | G 3/4 - G 1
Inlet pressure rating (DIN/ISO)
PN 10
Body material
0.7043 | Gr. 60-40-18
Narrowest flow diameter d₀
13 - 17.5 mm | 0.51 - 0.69 in
Narrowest flow area A₀
133 - 241 mm² | 0.21 - 0.37 in²
Bellows material
EPDM
pdf_DIN EN nach/acc
to DIN PN
pdf_Application range
page 2/30-33
pdf_Werkstoffbezeichnung Werkstoff-Nr
Eintritt Austritt bar/bar g
pdf_Ansprechdruck angeben
set pressure and if necessary, accessories.
pdf_Material Designation Material No
to 15/13 20/17,5
Manufacturer catalogue data, harvested 2026-08-15 09:32:51.
Tipo 459 HDD | LESER - A Válvula de Segurança
Diâmetro Nominal na Entrada - Rosca
1/2" - 1“ | 1/2" - 1“
Diâmetro Nominal na Entrada - Flange
DN 15 - DN 25 | 1/2" - 1"
Classificação de Flanges de Entrada
PN 320 - PN 400 | CL1500 - CL2500
Temperatura (de acordo com DIN EN)
-273 a 400 °C | -459 a 752 °F
Temperatura (para ASME)
-196 a 450 °C | -321 a 82 °F
Material do Corpo de Saída
1.4408 | SA 351 CF8M
Material do Corpo de Entrada
1.4404 | endurecido "stellited" SA 479 316L endurecido "stellited"
Material Fole (opcional)
Aço inoxidável (apenas para d09)
pdf_Material do do corpo de entrada
1.4104 (430)1)
pdf_Material do corpo
1.4104 (430)
pdf_ASME Sec
VIII Div. 1
pdf_Material do corpo de entrada
1.4104 (430)1)
Manufacturer catalogue data, harvested 2026-08-15 09:33:57.
Tipo 462 | LESER - A Válvula de Segurança
Diâmetro Nominal na Entrada - Rosca
1/2" - 1 1/2" | 1/2" - 1 1/2"
Diâmetro Nominal na Entrada - Flange
DN 15 - DN 25 | 1/2" - 1"
Classificação de Flanges de Entrada
PN 40 - PN 400 | CL150 - CL2500
Temperatura (de acordo com DIN EN)
-45 a 150 °C | -49 a 302 °F
Temperatura (para ASME)
-45 a 150 °C | -49 a 302 °F
Material do Corpo de Saída
1,0619, 1,4408, 0,7043 | SA 216 WCB, SA 351 CF8M, Duktil Gr. 60-40-18
Material do Corpo de Entrada
1.4104, 1.4404 | SA 479 430, SA 479 316L
Material Fole (opcional)
Aço inoxidável e elastômero
pdf_Material do do corpo de entrada
1.4104 (430)1)
pdf_Material do corpo
1.4104 (430)
pdf_ASME Sec
VIII Div. 1
pdf_Material do corpo de entrada
1.4104 (430)1)
Manufacturer catalogue data, harvested 2026-08-15 09:33:59.
Tipo 462 HDD | LESER - A Válvula de Segurança
Diâmetro Nominal na Entrada - Rosca
1/2" - 1“ | 1/2" - 1“
Diâmetro Nominal na Entrada - Flange
DN 15 - DN 25 | 1/2" - 1"
Classificação de Flanges de Entrada
PN 320 - PN 400 | CL1500 - CL2500
Temperatura (de acordo com DIN EN)
-45 a 150 °C | -49 a 302 °F
Temperatura (para ASME)
-45 a 150 °C | -49 a 302 °F
Material do Corpo de Saída
1.4408 | SA 351 CF8M
Material do Corpo de Entrada
1.4404 | SA 479 316L
Material Fole (opcional)
Aço inoxidável
pdf_Material do do corpo de entrada
1.4104 (430)1)
pdf_Material do corpo
1.4104 (430)
pdf_ASME Sec
VIII Div. 1
pdf_Material do corpo de entrada
1.4104 (430)1)
Manufacturer catalogue data, harvested 2026-08-15 09:34:01.
Tipo 441, 442 DIN | LESER - A Válvula de Segurança
Diâmetro Nominal na Entrada
DN 20 - DN 200 | 3/4" - 8"
Classificação de Flanges de Entrada
PN 16 - PN 40 | CL150 - CL300
Temperatura (de acordo com DIN EN)
-270 a 450 °C | -454 a 842 °F
Temperatura (para ASME)
-268 a 538 °C | -450 a 1000 °F
Material Corpo
0,6025, 0,7043, 1,0619, 1,4408 | Ferro fundido, Ductile Gr. 60-40-18, SA 216 WCB, SA 351 CF8M
Material Fole (opcional)
Aço inoxidável e elastômero
Manufacturer catalogue data, harvested 2026-08-15 09:34:09.
Tipo 441, 442 ANSI | LESER - A Válvula de Segurança
Diâmetro Nominal na Entrada
DN 25 - DN 100 | 1" - 4"
Classificação de Flanges de Entrada
CL150 - CL300 | CL150 - CL300
Temperatura (de acordo com DIN EN)
-270 a 450 °C | -454 a 842 °F
Temperatura (para ASME)
-268 a 538 °C | -450 a 1000 °F
Material Corpo
1.0619, 1.4408 | SA 216 WCB, SA 351 CF8M
Material Fole (opcional)
Aço inoxidável e elastômero
Manufacturer catalogue data, harvested 2026-08-15 09:34:11.
Tipo 441, 442 Diâmetro nominal elevado| LESER - A Válvula de Segurança
Diâmetro Nominal na Entrada
DN 250 - DN 400 | 10" - 16"
Classificação de Flanges de Entrada
PN 16 - PN 25 | CL150 - CL300
Temperatura (de acordo com DIN EN)
-196 a 550 °C | -321 a 1022 °F
Temperatura (para ASME)
-184 a 427 °C | -300 a 800 °F
Material Corpo
1.0460 / 1.0425, 1.4571 | Aço Carbono , 316Ti
Material Fole (opcional)
Aço inoxidável
Manufacturer catalogue data, harvested 2026-08-15 09:34:13.
Tipo 444 DIN | LESER - A Válvula de Segurança
Diâmetro Nominal na Entrada
DN 25 - DN 80 | 1" - 3"
Classificação de Flanges de Entrada
PN 16 | PN 16
Temperatura (de acordo com DIN EN)
-45 a 200 °C | -49 a 392 °F
Temperatura (para ASME)
-45 a 200 °C | -49 a 392 °F
Material Corpo
1.4404 | SA 479 316L
Material Fole (opcional)
Sem fole
Manufacturer catalogue data, harvested 2026-08-15 09:34:16.
Tipo 444 ANSI | LESER - A Válvula de Segurança
Diâmetro Nominal na Entrada
DN 25 - DN 80 | 1" - 3"
Classificação de Flanges de Entrada
CL150 | CL150
Temperatura (de acordo com DIN EN)
-45 a 200 °C | -49 a 392 °F
Temperatura (para ASME)
-45 a 200 °C | -49 a 392 °F
Material Fole (opcional)
Sem fole
Manufacturer catalogue data, harvested 2026-08-15 09:34:17.
Tipo 441, 442 Bocal Completo DIN | LESER - A Válvula de Segurança
Diâmetro Nominal na Entrada
DN 25 - DN 50 | 1" - 2"
Classificação de Flanges de Entrada
PN 16 - PN 40 | CL150 - CL300
Temperatura (de acordo com DIN EN)
-270 a 450 °C | -454 a 842 °F
Temperatura (para ASME)
-268 a 538 °C | -450 a 1000 °F
Material Corpo
1.0619, 1.4408 | SA 216 WCB, SA 351 CF8M
Material Fole (opcional)
Aço inoxidável e elastômero
Manufacturer catalogue data, harvested 2026-08-15 09:34:19.
Tipo 441, 442 Bocal Completo ANSI | LESER - A Válvula de Segurança
Diâmetro Nominal na Entrada
DN 25 - DN 100 | 1" - 4"
Classificação de Flanges de Entrada
CL150 - CL300 | CL150 - CL300
Temperatura (de acordo com DIN EN)
-270 a 450 °C | -454 a 842 °F
Temperatura (para ASME)
-268 a 538 °C | -450 a 1000 °F
Material Corpo
1.0619, 1.4408 | SA 216 WCB, SA 351 CF8M
Material Fole (opcional)
Aço inoxidável e elastômero
Manufacturer catalogue data, harvested 2026-08-15 09:34:21.
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