water pump control valve

700X water pump control valve consists of main valve, solenoid pilot valve, needle valve, ball valve, one-way valve, travel switch, micro filter and pressure gauge to form a hydraulic control takeover system. When the water pump needs to stop working, the main valve is first closed 90% by the inlet pressure, and then the water pump stops running. The remaining 10% is closed by return water. It can prevent water hammer from happening. Its working principle: When the working valve of the water pump supplies water to the downstream, click this pilot valve to fully rise, adjust the needle valve to the appropriate degree, and the forward flow enters the raw valve control room through the needle valve and one-way valve, and flows out through the solenoid pilot valve. At this time, the pressure in the main valve control chamber keeps the main valve at the appropriate opening and maintains normal water supply. When the water pump stops working, the solenoid pilot valve closes first, the main valve control chamber stops draining water, the pressure in the control chamber increases, and the main valve begins to close. When it is closed to 90%, the upper travel switch of the main valve outputs a pump stop signal and the water pump stops running. At this time, the downstream return crystal check valve enters the main valve control chamber, the pressure in the control chamber increases, and the main valve is closed. This product is controlled by a solenoid pilot valve and does not require other devices and energy. Save energy, easy maintenance, smooth pump shutdown.