The purpose of installing a check valve at the outlet of the water pump is to only allow the water pump to send water outside, and not allow the water to flow back to the pump in the opposite direction, to prevent the high pressure water from flowing back to the pump when the pump suddenly stops running, causing the pump to reverse.
The high-pressure water at the outlet of the pump can be directly sent to the boiler, or to the pipeline connected with the high-pressure main pipe or to the high-level water tank. During operation, when the pump suddenly stops running for some reason, the pressure in the pump disappears, and the high-pressure water connected to the outlet of the pump will flow back to the pump in the reverse direction. When the pump outlet is equipped with a check valve, it will be closed immediately to prevent the high-pressure water from flowing back to the pump. If the pump outlet is not equipped with a check valve, the high-pressure water will flow back to the pump in the reverse direction, and the impeller of the pump will reverse under the impact of the high-pressure water. Due to the impact load of high-pressure water on the impeller, the impeller or other parts may loosen or be damaged in severe cases; the water pressure of the main pipe will decrease, and the boiler water level will drop, which will affect the safe operation.
Post time: 2021-12-07
