DZ-E - Cutting-edge detonation flame arrester | PROTEGO® Skip to main content Service and Maintenance Downloads Contact Career Login en Products Products Product Search Special Solutions Flame Arresters Valves Tank Equipment Equipment for Cryogenic Storage Tanks Equipment for Hydrogen Storage Tanks Lightning Protection Product overview Find a product Find the right solution for your application. Product search Special Solutions No matter how complex the device or extreme the operating conditions, we will find a solution for you. Special Solutions Applications Applications Storage Tanks in Tank Farms Chemical and Pharmaceutical Processing Facilities Vapour Combustion Systems and Flares Ship Building, Offshore Platforms and Loading Systems Cryogenic Tanks Storage Tanks for Alcohol Biogas System Wastewater Treatment Safety and Landfill Gas Systems Flame Arresters as integrated Equipment Components Overview applications Application Example Protection of cryogenic storage tanks with Flame Arresters, Pilot-operated Valves and In-Tank Valves. Application details Competences Competences PROTEGO® Research & Development PROTEGO® Academy PROTEGO® QuEST - Quick Engineering and Sizing Tool PROTEGO® Engineering Service Standardization Committees Our Competences Research & Development We are a Research and Development Company. 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Sustainability Login en Products Product Search Special Solutions Flame Arresters Valves Tank Equipment Equipment for Cryogenic Storage Tanks Equipment for Hydrogen Storage Tanks Lightning Protection Applications Storage Tanks in Tank Farms Chemical and Pharmaceutical Processing Facilities Vapour Combustion Systems and Flares Ship Building, Offshore Platforms and Loading Systems Cryogenic Tanks Storage Tanks for Alcohol Biogas System Wastewater Treatment Safety and Landfill Gas Systems Flame Arresters as integrated Equipment Components Competences PROTEGO® Research & Development PROTEGO® Academy PROTEGO® QuEST - Quick Engineering and Sizing Tool PROTEGO® Engineering Service Standardization Committees Company PROTEGO® Worldwide Quality and HSE Compliance Sustainability Supply Chain Management and Procurement References Exhibition Dates Certificates & Approvals Company Service and Maintenance Downloads Contact Career Please select a language: × English Deutsch Español Française 中文 Português You are here: Start Products Product Search DZ/E Pressure or Vacuum Relief Valve, In-Line 10% technology for minimum pressure increase up to full lift extreme tightness, resulting in lowest possible product losses and reduced environmental pollution based on 10% technology, set pressure is close to opening pressure for optimum pressure maintenance in the system as compared to conventional 40% or 100% technology high flow capacity reduces costs through the use of smaller valves can be used as pressure or vacuum relief valve compact, space-saving right-angle design can be used in explosion hazardous areas sturdy housing design (PN 10) maintenance-friendly design Read more RFQ Download Function and Description The PROTEGO ® in-line valve DZ/E is a state-of-the-art pressure or vacuum relief valve with a right angle design. Typically, the valve is installed in the in-breathing or out-breathing lines of tanks, vessels, and process equipment to protect against unallowable overpressure or underpressure. The valve prevents emission losses almost up to the set pressure and prevents unacceptable product entry. The device will start to open as soon as the set pressure is reached and only requires 10% overpressure to full lift. Continuous investments in and a commitment to research and development have allowed PROTEGO ® to develop a low pressure valve which has the same opening characteristic as a high pressure safety relief valve. This “full lift type” technology allows the valve to be set at just 10% below the maximum allowable working pressure or vacuum (MAWP or MAWV) of the tank and still safely vent the required mass flow. The opening characteristic is the same for pressure and vacuum relief. Due to our highly developed manufacturing technology, the tank pressure is maintained up to the set pressure with a tightness that is far above the conventional standard. This feature is ensured by valve seats made of high quality stainless steel and with individually lapped valve pallets (1), or with an air cushion seal (2), in conjunction with a high quality FEP diaphragm. The valve pallets are also available with a PTFE seal to prevent them from sticking when sticky products are used and to enable the use of corrosive substances. After the overpressure is released or the vacuum is balanced, the valve re-seats and provides a tight seal. The optimized fluid dynamic design of the valve body and valve pallet is a result of many years of research work, resulting in stable operation of the valve pallet, optimized performance, and reduced product losses. Read more Dimensions Material Technical Data Flow capacity charts Application examples Dimensions To select the nominal size (DN), please use the flow capacity chart on the following page DN 25 / 1" 32 / 1¼“ 40 / 1½“ 50 / 2" 65 / 2½" 80 / 3" 100 / 4" 150 / 6" 200 / 8" 250 / 10" 300 / 12" a 110 / 4.33 110 / 4.33 125 / 4.92 125 / 4.92 170 / 6.69 170 / 6.69 190 / 7.48 230 / 9.06 275 / 10.83 325 / 12.80 350 / 13.78 b 75 / 2.95 75 / 2.95 90 / 3.54 90 / 3.54 115 / 4.53 115 / 4.53 120 / 4.72 160 / 6.30 225 / 8.86 275 / 10.83 300 / 11.81 c 180 / 7.09 180 / 7.09 230 / 9.06 230 / 9.06 245 / 9.65 245 / 9.65 260 / 10.24 335 / 13.19 505 / 19.88 575 / 22.64 630 / 24.80 d 150 / 5.91 150 / 5.91 170 / 6.69 170 / 6.69 235 / 9.25 235 / 9.25 280 / 11.02 335 / 13.19 420 / 16.54 505 / 19.88 565 / 22.24 Dimensions in mm / inches Dimensions for pressure or vacuum relief valve with heating jacket upon request Material selection for housing Design A B C Housing Steel Stainless Steel Hastelloy Heating jacket (DZ / E-H-...) Steel Stainless Steel Stainless Steel Valve seat Stainless Steel Stainless Steel Hastelloy Gasket PTFE PTFE PTFE Valve pallet DN 40 - 300 / 1 ½" - 12" A, C, E, F A, C, E, F B, D, G Valve pallet DN 25 - 32 / 1" - 1 ¼" H, I, J H, I, J – Option: Housing with ECTFE-lining Special materials upon request Material selection for valve pallet DN 40-300 / 1½" - 12'' Design A B C D E F G Pressure range [mbar] [inch W.C.] ±2,0 up to ±3,5 ±0.8 up to ±1.4 ±2,0 up to ±3,5 ±0.8 up to ±1.4 ±3,5 up to ±14 ±1.4 up to ±5.6 ±3,5 up to ±14 ±1.4 up to ±5.6 ±14 up to ±60 ±5.6 up to ±24 ±14 up to ±60 ±5.6 up to ±24 ±14 up to ±60 ±5.6 up to ±24 Valve pallet Aluminium Titanium Stainless Steel Titanium Stainless Steel Stainless Steel Hastelloy Sealing FEP FEP FEP FEP Metal to Metal PTFE Metal to Metal DN 25-32 / 1'' - 1¼" Design H I J Pressure range[mbar] [Inch W.C.] ±3,5 up to ±15 ±1.4 up to ±6.0 ±15 up to ±60 ±6.0 up to ±24 ±15 up to ±60 ±6.0 up to ±24 Valve pallet PTFE Stainless Steel Stainless Steel Sealing PTFE Metal to Metal PTFE For higher set pressure or vacuum refer to type DZ/E-F Special materials upon request Flange connection type EN 1092-1; Form B1 ASME B16.5 CL 150 R.F. other connections upon request Design Types and Specifications The valve pallet is weight loaded. Higher set pressures for pressure and vacuum are achieved by using spring loaded type DZ/E-F. Two different right angle designs are available: In-line pressure or vacuum relief valve, standard design DZ/E - – In-line pressure or vacuum relief valve with heating jacket DZ/E - H Additional special devices available upon request Within piping systems the influence of backpressure has to be considered in deciding the set pressure and opening characteristics. For special design solutions (e.g. partial load operation) the valve can be supplied with standard valve pallets (with proportional opening function). Settings DN 25 and 32 ±3.5 mbar ±60 mbar ±1.4 inch W.C. ±24 inch W.C. DN 40 up to 300 ±2.0 mbar ±60 mbar ±0.8 inch W.C. ±24 inch W.C. For higher set pressure or vacuum refer to type DZ/E-F Flow Capacity Chart The flow capacity charts have been determined with a calibrated and TÜV certified flow capacity test rig. Volume flow V in (m³/h) and CFH refer to the standard reference conditions of air ISO 6358 (20°C, 1bar). For conversion to other densities and temperatures refer to Sec. 1: “Technical Fundamentals”. Detail X Detail X Tank connection for pressure relief function Tank connection for vacuum relief function Request spare part PROTEGO® Headquarters Braunschweiger Flammenfilter GmbH Industriestr. 11 38110 Braunschweig Germany Phone: +49 (0) 5307 / 809-0 Fax: +49 (0) 5307 / 7824 E-mail: office(at)protego.com PROTEGO® Subsidiaries Brazil China France India Middle East Austria Spain Switzerland UK USA Follow us Imprint Terms Privacy Statement Conditions of Purchase Sitemap Search