Check Valve Selection Methods

Check valves allow fluid to flow in only one direction and prevent backflows. They work automatically. The valve opens when fluid flows in one direction, leading to a higher inlet pressure, and it is closed when fluid flows in an opposite direction, resulting in a higher outlet pressure.

Lift check valves, swing check valves, and butterfly type check valves are basic types of check valves. With different and unique features and functions, check valves should be selected correctly to adapt to different applications.

Following are some check valve selection tips for you reference:

1.To prevent the backflow of medium, check valves should be installed on equipment and pipelines.

2.Check valves are generally suitable for clean media instead of those that contain solid particles or have high viscosity.

3.Generally, horizontal lift check valves should be installed on horizontal pipelines with the nominal diameter of 50mm.

4.Straight-through lift check valves can only be installed on horizontal pipelines.

5.Lift check valves have better sealing performance than swing check valves. Horizontal lift check valves should be installed on horizontal pipelines and vertical type on vertical pipelines.

6.Swing check valves are installed without position limitation. They can be installed on horizontal, vertical, or inclined pipelines. When they are installed on vertical pipelines, the flow direction of media should be from bottom to top.

7.Swing check valves are applicable to pipelines with low pressure and large diameter.

8.Swing check valves can be applied to any working media and working temperature according to different materials of body and seal. They are suitable for water, steam, oil, gas, and other media. The applicable medium working temperature is between -196 degrees and 800 degrees.

9.The installation position of butterfly type check valves is not limited. They can be installed on horizontal, vertical, or inclined pipelines.