Wafer butterfly check valve has short face to face dimension (only 1/4~1/8 of the conventional flange check valve), small volume, light weight (1/4~1/20 of conventional flange check valve). Wafer butterfly check valve can be used for horizontal pipe lines and vertical pipe lines. The check valve also has the advantages of compact structure, beautiful modeling, long service life and excellent reliability. 

 

Check valve is used for pipeline to avoid refluence of medium. Check valve is an automatic valve that open and close by the medium pressure. In the past, flanged swing check valve and flanged lift check valve are widely used, but those valves have the disadvantages of large volume, fluid resistance, high water hammer pressure, hard installation and short service life. 

For that, based on American API Standards and German DIN Standards, combining with abundant experience on research, design and manufacturing, we develop wafer butterfly check valve wich is welcome in petroleum, metallurgy, power and other industries. 

 

Characteristics:

1. Short face to face dimension(only 1/4~1/8 of conventional flange check valve);

2. Small volume, light weight (1/4~1/20 of conventional flange check valve);

3. The disc closes rapidly,and has small water hammer pressure;

Can be used for horizontal pipe lines and vertical pipe lines. 4. Convenient utilization; 

5. Free channel and small fluid resistance;

6. Excellent sealing;

7. Short stroke of valve disc and small impact force when closing valve;

8. Compact structure, beautiful modeling;

Comparison between Wafer Butterfly Check Valve and Conventional Check Valve 

Structure	Wafer butterfly check valve	Conventional check valve
Water hammer pressure	Small. Valve disc has short stroke. With assistance of spring, it can be closed rapidly.	Large. It needs long time to close for its long stroke.
	Only 1/2~1/5
Size & Weight	Short face to face dimension, small volume, light weight convenient for utilization and save cost	Long face to face dimension, large volume and heavy weight
	Face to face dimension: only 1/4~1/6 of conventional flange check valve; Weight: 1/4~1/10 of conventional flange check valve
Fluid Resistance	Quite small; fluid drag coefficient: 2.6～0.7 Larger caliber, smaller fluid drag coefficient	Quite small, fluid drag coefficient: 1.3~3. It cannot be opened  completely with low pressure which caused large fluid resistance.  Larger size, bigger fluid drag coefficient.
Installing	Can be installed horizontally or vertically or vertically, without support for light weight.	Can be installed horizontally and vertically.  Support is needed for large size for heavy weight
Pressure	Quite low. The valve can be opened completely under low differential pressure.	High. Valve disc only can be opened completely with large differential pressure
Reliability	Compact and simple structure having long service life and excellent reliability, for low impact fore and water hammer pressure when closing valve.	High impact fore and water hammer pressure cause damage to valve easily.