FLOWSPEC AX742X diaphragm type relief valve is mounted on the high building fire fighting water supply system and other water supply system pipe to open automatically to relieve pressure quickly when the pressure in the water supply pipe exceeds the relief valve set pressure. AX742X diaphragm type relief valve can also be as pressure keeping valve to keep the main valve upstream water supply pressure. AX742X diaphragm type relief valve can keep the safe set pressure accurately, in case of over pressure, the relief valve will open quickly to relieve pressure in time.
AX742X diaphragm type relief valve close is smooth and reliable to eliminate pressure aftereffect.