The pump control valve consists of a main valve, solenoid pilot valve, needle valve, ball valve, check valve, travel switch, micro-filter and pressure meter to form a hydraulic control receiver system. When the pump needs to stop working, the pump stops running after 90% of the main valve is closed by the inlet pressure first. The remaining 10% is closed by the return water. To avoid water hammer phenomenon. Water pump control valve using electromagnetic pilot valve control, without other devices and energy. Save energy, easy maintenance, stop the pump smoothly. The solenoid valve can be used with AC 220V or DC 24V, which is mainly used in building, living area and other water supply pipe network system and urban water supply project.

Pump control valve is a kind of pump outlet installed in the building and other water supply system, so as to avoid backflow of media backstop type valve. When the pump will stop before the water supply, the valve first slowly closed about 90%, so as to avoid the sudden stopping of the pump and the water hammer and the sound of water; when the pump stops, the valve and then close, so as to avoid the pumping out of the water backflow, to protect the pump from the impact of the reflux of the reversal of the impact. The product is the pump outlet protection device, the valve is streamlined design, through the solenoid valve guide control to realize the opening and closing, so as to avoid water hammer and water impact sound.

Water pump control valve working principle, when the pump working valve to the downstream water supply, the electromagnetic pilot valve is fully open, the needle valve is adjusted to the appropriate degree of opening, the upstream water through the needle valve, check valve into the main valve control chamber, through the electromagnetic pilot valve outflow, at this time, the main valve control chamber pressureure to maintain the main valve in the appropriate degree of opening, to maintain the downstream of the normal water supply. When the pump stops working, the electromagnetic pilot valve closes first, the main valve control chamber stops draining, the pressure of the control chamber rises, and the main valve starts to close. When closed to 90%, the main valve upper trip switch output stop pump signal, the pump stops running. At this time the downstream return water through the check valve into the main valve control room, control room pressure rise, the main valve is closed.