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Selection of check valve

Views:8     Author:Site Editor     Publish Time: 2021-01-22      Origin:Site

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

2. For low pressure check valves below 50mm, butterfly check valves, vertical lift check valves and diaphragm check valves should be used; for medium and low pressure check valves large than 200mm and less than 1200mm, non-wearing should be selected Spherical up-return valve; for low pressure check valves large than 50mm and less than 2000mm, butterfly check valves and diaphragm check valves should be used.

3. Diaphragm check valve is suitable for pipelines that easily produce water. Diaphragm can well eliminate the water produced when the medium flows back. However, it is limited by temperature and pressure and is generally used on low-pressure and normal-temperature pipelines.

4. For pipelines that require less water impact or no water when closed, slow-closing swing check valves and slow-closing butterfly check valves should be selected.


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