VD/SV-AD, VD/SV-ADL

The Deflagration Deflagration Explosion propagating at subsonic velocity (EN 1127-1:1997). -Proof Pressure/vacuum relief valve Pressure/vacuum relief valve is an umbrella term that includes pressure or vacuum relief valve as well as pressure and vacuum relief valve. 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 Flame arrester Device fitted to the opening of an enclosure, or to the connecting pipe work of a system of enclosures, and whose intended function is to allow flow but prevent the transmission of a flame. Unit. It is primarily used as a device Device A device is a pipe component that influences the media flow by opening, closing, or partially shutting off the flow channel or by dividing or mixing the media flow. for flame-transmission-proof in-breathing and out-breathing in tanks, containers, and process equipment Equipment Machines, appliances, fixed or mobile devices, control parts and accessories, and warning and prevention systems, whether separate or combined, intended for the generation, transfer, storage, measurement, control, and conversion of energy, and for the processing of materials, which have their own potential source of ignition and may cause an explosion. . The valve offers reliable protection against overpressure Overpressure Overpressure refers to an increase in pressure in a system or vessel above the normal operating pressure. and vacuum Vacuum Vacuum is the pressure in an enclosed space that is lower than the ambient pressure. , prevents out-breathing of product Product Includes equipment, protective systems, devices, components and combinations of these. vapor and in-breathing of air almost up to the set pressure Set pressure Set pressure is the gauge pressure at the device inlet at which the relief device is set to start opening under service conditions. , 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 Explosion Abrupt oxidation or decomposition reaction producing an increase in temperature, pressure, or in both simultaneously. groups IIA to IIB3 (NEC group D to C MESG ≥ 0.65 mm).

The tank pressure Tank pressure Tank pressure is the pressure within a tank. 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 Seal A seal prevents or limits unwanted transfer of product from one container to another. Seal is used as superordinate term for all types of sealing elements. (2), in conjunction with high quality FEP diaphragm Diaphragm A diaphragm is a thin layer of material, which has a large surface area. . 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.