VD-KSM-PA - precision pressure valve | 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. 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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/KSM-PA Pressure and Vacuum Relief Valve made of plastic 10% technology for minimum pressure increase up to full lift extreme tightness, resulting in lowest possible product losses and reduced environmental pollution set pressure close to opening pressure for optimum pressure maintenance in the system valve pallet is guided inside the housing to protect against harsh weather conditions non-corrosive especially suitable for aggressive, sticky, or polymerizing substances weight reduction in comparison to steel/stainless steel automatic condensate drain high surface quality different plastics can easily be combined maintenance-friendly design Read more RFQ Download Function and Description The PROTEGO ® valve VD/KSM-PA is a state-of-the-art pressure and vacuum relief valve with excellent flow performance made of high-grade synthetic material. Typically, the valve is installed in the in-breathing and out-breathing lines of tanks, vessels, and process equipment to protect against unallowable overpressure and under pressure. The valve prevents emission losses almost up to the set pressure. The valve is a perfect solution for corrosive, polymerizing, or sticky substances. 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 and vacuum (MAWP and MAWV) of the tank and still safely vent the required mass flow. The opening characteristic for the pressure and vacuum sides is the same. Due to our highly developed manufacturing technology, the tank pressure is maintained up to the set pressure with a tightness that is far superior to the conventional standard. This feature is achieved by special valve seats made of high quality synthetic material or PTFE. After the excess pressure is released or the vacuum is balances, 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, resulting in a 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), use the flow capacity charts on the following pages DN1 50 / 2" 80 / 3" 100 / 4" 150 / 6" 200 / 8" DN2 50 / 2" 80 / 3" 100 / 4" 150 / 6" 200 / 8" a 490 / 19.29 650 / 25.59 775 / 30.51 930 / 36.61 1260 / 49.61 a (750 / 29.53)* (958 / 37.72)* (1200 / 47.24)* b 376 / 14.80 521 / 20.51 563 / 22.17 670 / 26.38 879 / 34.61 b (523 / 20.59)* (651 / 25.63)* (912 / 35.91)* c 150 / 5.91 200 / 7.87 225 / 8.86 280 / 11.02 350 / 13.78 d 200 / 7.87 245 / 9.65 300 / 11.81 370 / 14.57 590 / 23.23 d (650 / 25.59)* e 180 / 7.09 250 / 9.84 300 / 11.81 350 / 13.78 560 / 22.05 e (405 / 15.94)* (500 / 19.68)* Dimensions in mm / inches *Dimensions in brackets only for PVDF Material selection for housing Design A B C Housing PE PP PVDF Valve seat PE PP PVDF Sealing FPM FPM FPM Pressure valve pallet A, C, D B, C, D C, D Vacuum valve pallet A, C, D B, C, D C, D Special materials upon request Material selection for pressure valve pallet Design A B C D Pressure range [mbar] [inch W.C.] +6,0 up to +16 +2.4 up to +6.4 +5,5 up to +16 +2.2 up to +6.4 +9,5 up to +30 +3.8 up to +12 +30 up to +100 +12 up to +40 Valve pallet PE PP PVDF Hastelloy Sealing PTFE PTFE PTFE PTFE Spindle guide PE PP PVDF Hastelloy Weight PE PP PVDF Hastelloy Special materials and other pressure settings upon request Material selection for vacuum valve pallet Design A B C D Pressure range [mbar] [inch W.C.] -6,0 up to -16 -2.4 up to -6.4 -5,5 up to -16 -2.2 up to -6.4 -9,5 up to -30 -3.8 up to -12 -30 up to -100 -12 up to -40 Valve pallet PE PP PVDF Hastelloy Sealing PTFE PTFE PTFE PTFE Spindle guide PE PP PVDF Hastelloy Weight PE PP PVDF Hastelloy Special materials and other vacuum settings upon request Flange connection type EN 1092-1; Form B1 ASME B16.5 CL 150 F.F. other types upon request Design Types and Specifications The valve pallets are weight-loaded, and the highest pressure levels are only attained with metal discs. Pressure/vacuum valve in basic design VD/KSM-PA Additional special devices available upon request. Settings Pressure: +6.0 mbar +100 mbar +2.4 inch W.C. +40 inch W.C. +4.0 mbar +100 mbar +1.6 inch W.C. +40 inch W.C. +4.5 mbar +100 mbar +1.8 inch W.C. +40 inch W.C. Vacuum: -6.0 mbar -100 mbar -2.4 inch W.C. -40 inch W.C. -4.0 mbar -100 mbar -1.6 inch W.C. -40 inch W.C. -4.5 mbar -100 mbar -1.8 inch W.C. -40 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”. 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