BE/HR-D

The deflagration Deflagration Explosion propagating at subsonic velocity (EN 1127-1:1997). -proof and endurance burning Endurance burning Stabilized burning for an unlimited time. -proof BE/HR-D type PROTEGO® valve is a highly developed pressure relief valve Pressure-relief valve Valve designed to open and relieve excess pressure and to reclose and prevent the further flow of fluid after normal conditions have been restored. with an integrated flame arrester unit Flame arrester unit Flame arrester casing with FLAMEFILTER® set. . 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 outbreathing on tanks, containers and process engineering apparatus. The valve offers reliable protection against excess pressure and prevents product losses 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. ; it also protects against atmospheric deflagration as well as endurance burning if stabilized burning Stabilized burning Steady burning of a flame stabilized at, or close to the flame arrester element. occurs. The PROTEGO® flame arrester unit is designed to achieve minimum pressure drop with maximum safety. The BE/HR-D valve is available for substances of explosion Explosion Abrupt oxidation or decomposition reaction producing an increase in temperature, pressure, or in both simultaneously. group IIA (NEC group D MESG > 0.9 mm).

If the set pressure is exceeded, explosive gas/product-vapour air mixtures are released to the atmosphere. If this mixture ignites, the integrated PROTEGO® flame arrester unit (3) prevents flame transmission into the tank. If additional mixture continues to flow and stabilized burning occurs, the integrated flame arrester unit prevents flashback Flashback Phenomenon occurring in a flammable mixture of air and gas when the local velocity of the combustible mixture becomes less than the flame velocity, causing the flame to travel back to the point of mixture. as a result from endurance burning. The valve is protected and also fulfils its function under this severe service conditions. The spring Spring A spring is a spiral of wire which returns to its original shape after it is pressed or pulled. loaded weather hood Weather hood A weather hood is a cover to protect the internal components of a device from environmental influences. opens as soon as the fusible element (4) melts. The valve can be used up to an operating temperature Operating temperature Temperature reached when the equipment is operating under design conditions. of +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.