Cast Steel Check Valve

The selection criteria for check valves are as follows:

1. Check valves should be installed on equipment, devices and pipelines in order to prevent medium countercurrent.

2. Check valves are generally suitable for cleaning media, not for media containing solid particles and high viscosity.

3. Horizontal lift check valves should be used in horizontal pipelines with nominal diameter of 50mm.

4. Direct lift check valves can only be installed in horizontal pipes.

5. For the inlet pipeline of the pump, the bottom valve should be selected. The bottom valve is generally installed on the vertical pipeline of the pump inlet, and the medium flows from bottom to top.

6. The lifting type has better sealing performance than the swing type, and has larger fluid resistance. Horizontal type should be installed in horizontal pipeline, and vertical type should be installed in vertical pipeline.

7. Installation position of swing check valve is not limited. It can be installed in horizontal, vertical or inclined pipelines. If installed in vertical pipelines, the flow direction of medium should be from bottom to top.

8. Swing check valves should not be made into small caliber valves, and can be made into high working pressure. The nominal pressure can reach 42 MPa, and the nominal diameter can also be large, up to 2000 mm. It can be applied to any working medium and any working temperature range according to the material of shell and seal. Medium is water, steam, gas, corrosive medium, oil, medicine, etc. The working temperature range of the medium is - 196 - 800 C.