Check valves are generally installed in the discharge pipeline of the pumping system to ensure that the pumped medium does not flow back. With so many check valves on the market, finding the right one for your application can be a challenge. Before you start shopping for check valves, make sure you know the answers to these five questions.
The intended use of the valve and the environment in which it will be used are critical in order to select the correct valve for your specific application. It is very common to install the wrong check valve in the piping system, and the check valve should generally be selected according to the size of the pipeline.
Know that the flow rate is the most important, in gallons per minute (GPM), gallons per hour (GPH), if your process flow is higher than 8 feet per second flow through the valve, there will be higher wear Rate. When the flow rate is higher than 8 feet per second, whether it is a rubber valve or a metal valve, wear will cause performance degradation. The faster the flow, the more wear on the check valve, resulting in reduced life. Knowing the flow rate can help you choose the best check valve for your specific requirements.
Knowing the inlet pressure will help determine which type of check valve you need. Do you need a "ball" style check valve? Do you need a "swing" check valve? Or do you need a silencer check valve? Or a flange check valve or a wafer check valve? Determining which check valve you need depends on the orientation of the check valve in the pump system.
Back pressure is the pressure difference between the inlet and outlet pressures. For example, a valve is installed at the end of a pipe that discharges fluid into a small bore. How high will the water be above the surface as the flow rises? Back pressure occurs when water rises above this valve. Therefore, according to your detailed use, you should know how much back pressure the check valve needs to accept.
If the valve is installed submerged in the medium, this means that there is always a back pressure on the valve. In this case, you need to pick a check valve that is intended for submerged conditions and is manufactured from the correct material. The mistake of putting the wrong check valve in the piping system is relatively common. If your check valves are having frequent problems, it may be the result of a poor selection. Before purchasing a check valve, please inform Vitoli Valve salesman of your working conditions and needs in detail, and then you can choose a more suitable valve!