The advantages and disadvantages of the check valve before or after the pump-jlsvalve.com

The advantages and disadvantages of the check valve before or after the pump

The check valve, also known as the check valve, is an automatic door valve that plays a large role in ensuring the safety of the pipeline. The check valve is installed to ensure the flow of water inside the pump, thus ensuring the normal operation of the pump. The functions of the check valve before or after the pump are different. The difference is:
1. The working pressure of the valve before the pump is low, and the working pressure of the valve after the pump is high;
2. The valve before the pump is shut off the water during maintenance. The valve after the pump also has the function of shutting off the water when the valve is being repaired. The check valve behind the valve also protects the water pump and prevents the impact of the water hammer.
3. The function of the bottom valve in front of the pump is to prevent water leakage when filling the pump. The valve does not have this function after the pump. So about the installation position of the check valve, which is better check valve before or after the pump?

One is installed at the end of the vertical suction pipe of the water pump. The purpose is to charge the water pump to the water pump without pumping water once, because the water pump can only vacate and not pump water when there is no water in the suction pipe in front of the pump, so the pump must Water can be pumped out of water. This type of pump is installed above the liquid level. It is also called negative pressure method, such as pumping water from a well. Another method of installing the water pump is that the liquid level is higher than the water pump. Generally, this method is used for the secondary water supply. Since the liquid level is higher than the water pump, it is convenient to start and stop the water pump when the water pump outlet valve is not closed, so the check valve should be installed. The rear of the pump.

Therefore, it is necessary to look at the use of the check valve in the pump to determine the installation position, which can not be said one-sided.

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