Check valve manufacturer: tell you the selection standard of check valve

1, in order to prevent the reverse flow of the medium, check valves should be installed on the equipment, devices and pipelines;

2, the check valve is generally suitable for clean media, not suitable for media containing solid particles and large viscosity;

3, generally in the nominal through 50mm horizontal pipe should be selected vertical lift check valve

4, straight-through lifting check valve can be installed on horizontal pipe and vertical pipe;

5, for the pump inlet pipeline, it is appropriate to choose the bottom valve, the bottom valve is generally only installed on the vertical pipeline of the pump inlet, and the medium flows from below;

6, lifting type swing sealing is good, fluid resistance is large, horizontal should be installed on the horizontal pipe, vertical installed on the vertical pipe;

7, the installation position of the swing check valve is not limited, it can be installed on the horizontal, vertical or inclined pipeline, such as installed on the vertical pipeline, the medium flow direction should be from the bottom to the top;

8, swing check valve should not be made into a small diameter valve, can be made into a high working pressure, PN can reach 42MPa, and DN can also be very large, relatively large can reach 2000mm or more. According to the material of the shell and seal, it can be applied to any working medium and any working temperature range. The medium is water, steam, gas, corrosive medium, oil, medicine, etc. Medium operating temperature range between -196--800℃;

9, the application occasion is low pressure large diameter, and the installation occasion is limited;

10, the installation position of butterfly check valve is not limited, can be installed on the horizontal pipe, can also be installed on the vertical or inclined pipeline;

11, diaphragm check valve is suitable for easy to produce water hammer pipe, diaphragm can well eliminate the water hammer produced by the medium countercurrent, it is generally used in low pressure normal temperature pipe, especially suitable for water pipe, the general medium working temperature between -12--120℃, working pressure <1.6MPa, but diaphragm check valve can do larger caliber, A large DN can reach more than 2000mm.