Installed in the pipeline, high-rise building fire water supply system and water supply system, water supply pipeline when the pressure exceeds the pressure relief set pressure, pressure relief valve automatically opens fast relief, protection of pipeline safety, also can be used for holding pressure valve, main valve upstream water supply pressure protection. Can accurately maintain the security of the set pressure constant, once the pressure, pressure relief valve to open quickly, timely relief. Closing the stable and reliable, eliminating the pressure wave.

Note: the installation diagram of elastic valve seat seal or valve optional, suggest ≥ DN350 butterfly valve. The H value for reference purposes only, to the real actual size as 。