The main function of the pump outlet "check valve"
The main functions of the "check valve" at the pump outlet are reflected in the following aspects:
1. Prevent liquid backflow
Protect the pump body: The main function of the check valve is to prevent the liquid in the outlet pipeline from flowing back into the pump after the pump stops running. This can avoid the pump body from reversing due to liquid backflow, thereby protecting the pump body and its internal parts from damage.
Prevent water hammer phenomenon: When the liquid flows back, water hammer phenomenon may occur, that is, the impact force generated when the liquid flow suddenly stops or changes direction. This impact force may cause damage to the impeller and other components in the pump. Timely closure of the check valve can effectively prevent the occurrence of water hammer phenomenon.
2. Ensure system safety
Prevent medium backflow: Installing a check valve at the pump outlet can ensure that the medium flows in the predetermined direction and prevent it from backflowing into the pump or other equipment, thereby ensuring the safe and stable operation of the entire system.
Prevent accidents from expanding: In some cases, such as when the pump suddenly loses power or fails, the timely closure of the check valve can prevent the expansion of accidents caused by liquid backflow and reduce losses.
3. Improve system efficiency
Reduce energy consumption: By preventing liquid backflow, the check valve can reduce the energy consumption of the pump during the start-up and stop process and improve the overall efficiency of the system.
Optimize system performance: The rational use of the check valve can optimize the system's performance parameters, such as flow, pressure, etc., to make it more in line with the design requirements.
4. Other functions
Prevent media contamination: In some special occasions, such as when conveying toxic, harmful or easily contaminated media, the check valve can prevent the contamination caused by the backflow of the media.
Adapt to different working conditions: There are many types of check valves, and the appropriate type and specifications can be selected according to different working conditions and needs to meet the requirements of the system.
The pump outlet "check valve" plays an important role in protecting the pump body, ensuring system safety, improving system efficiency, and preventing media contamination. Therefore, when designing and using the pump system, the selection and installation of the check valve should be fully considered.
