VD-SV-AD/VD-SV-ADL - dual venting systems | 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 VD/SV-AD, VD/SV-ADL Pressure/Vacuum Relief Valve atmospheric deflagration-proof 10% technology for minimum pressure increase up to full lift extreme tightness, resulting in lowest possible product losses and reduced environmental pollution due to 10% technology, set pressure is close to opening pressure for optimum pressure maintenance in the system as compared to conventional 40% or 100% technology valve opens later and closes earlier than conventional valves valve pallet is guided inside the housing to protect against harsh weather conditions can be used as a protective system in areas with potentially explosive atmospheres in accordance with ATEX FLAMEFILTER ® provides protection against atmospheric deflagrations integrated PROTEGO ® flame arrester unit saves space and weight and reduces costs PROTEGO ® flame arrester unit is protected from clogging and sticky substances caused by product vapors minimum pressure loss of the PROTEGO ® flame arrester unit higher flow capacity flameproof condensate drain maintenance-friendly design modular design enables replacement of individual FLAMEFILTER ® discs and valve pallet best possible technology for API tanks Read more RFQ Download Function and Description The deflagration proof VD/SV-AD(L) type PROTEGO ® valve is a highly developed combined pressure/vacuum relief valve for high flow capacities with an integrated flame arrester unit. It is primarily used as a device for flame-transmission-proof in-breathing and out-breathing in tanks, containers, and process equipment. The valve offers reliable protection against overpressure and vacuum, prevents out-breathing of product vapor and in-breathing of air almost up to the set pressure, and protects against atmospheric deflagration. The PROTEGO ® flame arrester unit is designed to achieve minimum pressure rop with maximum safety. The deflagration-proof PROTEGO ® VD/SV-AD(L) valve is available for substances from explosion groups IIA to IIB3 (NEC group D to C MESG ≥ 0.65 mm). When the set pressure is reached, the valve starts to open and reaches full lift within 10% overpressure. This unique 10% technology enables a set pressure that is only 10% below the maximum allowable working pressure (MAWP) or maximum allowable working vacuum (MAWV) of the tank. After years ofdevelopment, this typical opening characteristic of a safety relief valve is now also available for the low pressure range. The tank pressure is maintained up to the set pressure with a tightness that is above to the normal standards due to our state-of-the-art manufacturing technology. This feature is ensured by the 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 high quality FEP diaphragm. The valve pallets are also available with a PTFE seal to prevent them from sticking when sticky substances are used and to enable the use of corrosive fluids. After the overpressure is released or the vacuum is balanced, the valve reseats and provides a tight seal. If the set pressure is exceeded, explosive gas/product vapor/air mixtures are released into the atmosphere. If this mixture ignites, the integrated PROTEGO ® flame arrester unit (3) revents flame transmission resulting from atmospheric deflagration into the tank. The vacuum side is also protected against atmospheric deflagration. The valve can be used at an operating temperature of up to +60°C / 140°F and meets the requirements of European tank design standard EN 14015 (Appendix L) and ISO 28300 (API 2000). EU conformity according to the currently valid ATEX directive. Approvals according to other national/international regulations on request. Read more Dimensions Material Technical Data Flow capacity charts Application examples Dimensions To select the nominal size (DN), please use the flow capacity charts on the following pages VD / SV-AD VD / SV-ADL DN 80 / 3" 100 / 4" 100 / 4" 150 / 6" a 540 / 21.26 565 / 22.24 650 / 25.59 760 / 29.92 b 475 / 18.70 575 / 22.64 700 / 27.56 855 / 33.66 c 350 / 13.78 350 / 13.78 600 / 23.62 600 / 23.62 Dimensions in mm / inches Material selection for housing Design A B Housing Steel Stainless Steel Valve saets Stainless Steel Stainless Steel Gasket PTFE PTFE Weather hood Stainless Steel Stainless Steel Flame arrester unit A, B B Option: Housing with ECTFE-lining Sonderwerkstoffe auf Anfrage Material combinations of flame arrester unit Ausführung A B FLAMEFILTER ® cage Steel Stainless Steel FLAMEFILTER ® Stainless Steel Stainless Steel Special materials upon request Material selection for pressure valve pallet Design A B C D Pressure range [mbar] [inch W.C.] +2.0 up to +3.5 +0.8 up to +1.4 >+3.5 up to +14 >+1.4 up to +5.6 >+14 up to +210 >+5.6 up to +84 >+35 up to +210 >+14 up to +84 Valve pallet Aluminium Stainless Steel Stainless Steel Stainless Steel Sealing FEP FEP Metal to Metal PTFE Special material as well as higher set pressure upon request Material selection for vacuum valve pallet Design A B C D Vacuum range [mbar] [inch W.C.] -2.0 up to -3.5 -0.8 up to -1.4 <-3.5 up to -14 <-1.4 up to -5.6 <-14 up to -35 <-5.6 up to -14 <-14 up to -35 <-5.6 up to -14 Valve pallet Aluminium Stainless Steel Stainless Steel Stainless Steel Sealing FEP FEP Metal to Metal PTFE Special material as well as higher set vacuum upon request Selection of explosion group MESG Expl. Gr. (IEC / CEN) Gas Group (NEC) ≥ 0,65 mm IIB3 C Special approvals upon request Flange connection type EN 1092-1; Form B1 ASME B16.5 CL 150 R.F. other types upon request Design Types and Specifications Any combination of vacuum and pressure levels can be set for the valve The valve discs are weight-loaded. There are two different designs: Pressure/vacuum relief valve with housing, standard design VD/SV-AD Pressure/vacuum relief valve with expanded housing VD/SV-ADL Additional special devices available upon request Settings Pressure: +3.5 mbar +35 mbar +1.4 inch W.C. +14 inch W.C. Vacuum: -2.0 mbar -35 mbar -0.8 inch W.C. -14 inch W.C. Higher and lower settings upon request 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 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