Which is better, Wafer check valve and flange check valve? The answer is flanged check valves, because flanged check valves can withstand greater pressure and are widely used. The main advantages of wafer check valves are their low price and small size. But we can’t compare these two kinds of check valves, because these two kinds of valves are quite different, and choosing the right valve under the right working conditions can play the role of the valve.? Wafer check valve and flange check valve The answer is flanged check valves, because flanged check valves can withstand greater pressure and are widely used. The main advantages of wafer check valves are their low price and small size. But we can’t compare these two kinds of check valves, because these two kinds of valves are quite different, and choosing the right valve under the right working conditions can play the role of the valve.
Wafer check valve or flange check valve
The difference between wafer check valve and flange check valve are:
- The use of water hammer pressure is different:
The wafer check valve is small in size, has a short disc stroke, and is assisted by a spring to close the valve.
- Comparison of size and weight:
The wafer check valve has a short structure, small size and light weight, which brings great convenience to the installation, handling, storage and pipeline arrangement of the valve, and can save a lot of materials and reduce the cost; flange check valve The valve structure is long, bulky and heavy.
- The application of fluid resistance is different:
The resistance of the wafer check valve is small, and the fluid resistance coefficient ξ is 2.6~2.7. With the increase of the valve diameter, the fluid resistance coefficient decreases; the flange check valve is smaller, and the fluid resistance coefficient ξ is 1.3~3 , but under low pressure conditions, the valve disc cannot be completely opened, and the fluid resistance is large. The fluid resistance increases with the increase of the valve diameter.
- The method of installation is different:
Wafer check valve can be installed horizontally or straightly, and the weight is light, so it is not necessary to set a support for the valve; the horizontal installation of flange check valve and large-diameter valve are heavy and need to set a support.
- The opening pressure is different:
The opening of the wafer check valve is very small, and the disc can be completely opened under a small pressure difference; the opening pressure of the flange check valve is large, and the disc can be completely opened under a large pressure difference.
- The reliability of the valve is different:
The wafer check valve is a whole structure, simple and compact, the impact force is small when the valve is closed, the water hammer pressure is small, the valve life is long, and the reliability is high; the huge impact force and water hammer pressure when the flange check valve is closed is easy Damage the valve.