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Library› Engine Room› Industrial Valves› Safety / Relief Valve› LESER GmbH Critical ServiceType 447B
LESER GmbH

Critical ServiceType 447B

Safety / Relief Valve · Industrial Valves

Class-certified type (DNV register) · technical data sheet not yet verified

Safety valves with conductive PTFE full lining in inlet and outlet area for potentially explosive atmospheres

Specifications

Technical data.

Every value below comes from the manufacturer datasheet or class-society record on file for this model.

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 1092DN 25 - DN 100
Connections ASME B16.5NPS 1 - NPS 4
Flange class Inlet DIN EN 1092PN 10 - PN 16
Flange class Inlet ASME B16.5Class 150
Body material1.0619 + PTFE | SA 216 WCB + Virginal PTFE with conductive pigments
Narrowest flow diameter d₀23 - 92 mm | 0.91 - 3.62 in
Narrowest flow area A₀416 - 6648 mm² | 0.645 - 10.304 in²
Bellows materialPTFE-TFM with conductive pigments
pdf_AQSIQ based on the approvals accto AD 2000-Merkblatt A2 cost-effective maintenance
Pdf materialsPFA
Pdf all directions in a pressure vesselThis strongly
Pdf nickel-based materialsNickel-based alloys are used in LESER’s Type 526. The “LESER
pdf_Flange thickness is smaller (max2 mm), see “Multiple pressure rating”.
pdf_Flange drilling as specified in standardFlange thickness may be less than the flange outer diameter as specified.
pdf_Body material is certified accto 3.1 (EN 10204) for the following materials
pdf_DIN EN 10204-3.2TÜV-Nord
pdf_Body material1.0619 + virgin PTFE-TF (WCB + PTFE-TF)
pdf_Standard flange classFor other flange drillings, see page 31.
pdf_PED / Approval No072020111Z0008/0/09
pdf_ASME SecVIII Approval No. M37123
pdf_Approval NoM37134
pdf_CRN Approval NoFor current approval no. see www.leser.com
pdf_AQSIQ Approval NoFor current approval no. see www.leser.com
pdf_EAC Approval NoFor current approval no. see www.leser.com
pdf_PED/DIN EN ISO 4126-1 Approval no072020111Z0008/0/19
pdf_PED/AD 2000-Merkblatt A2 Approval noTÜV SV 496
pdf_AQSIQ Approval noFor current approval no. see www.leser.com
pdf_EAC Approval noFor current approval no. see www.leser.com
Pdf dimensionsPlease use the “Specification Sheet” on page 59
pdf_Special material e.gHastelloy®  – 
pdf_Water resistance as per ISO 719-HGB1 Density (at 25 °C): 2,23 g/cm3
pdf_Water resistance as per ISO 719-HGA1 Elasticity module: 63 kN/mm2
pdf_Acidity class as per ISO 17761 480
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Download datasheet (PDF) (7837 KB)
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