Check Valve

175H48Y(H)-200Air Release Check ValvePrimarily used at the outlet of fire power plant feed water pumps, it works in conjunction with the pump's low-flow recirculation valve to ensure the system's safe operation.

The principle of operation is as follows:
OpenExport ValveThe feed water pump starts up, and once the water reaches a certain pressure, the valve core automatically rises, pushing away from the valve seat, allowing the feed water to flow out. At the same time, the valve core rod actuates the vent valve.

Port cover for air vent. When the pump flow rate decreases, the valve core drops, pushing the connecting rod to lift the venting valve blade, and opening the recirculation gate to maintain low pump flow. When the pump is stopped,

The valve core automatically falls to close the passage, thereby preventing high-pressure water hammer from damaging the water supply system.