Check valve is to rely on the flow of the medium itself automatically open and close the valve flap, used to prevent the media back to the valve. Check valve according to its structure can be divided into: First, the lift check valve: Valve along the valve body vertical centerline sliding check valve, lift check valve can only be installed in the horizontal pipe, high pressure small-caliber The valve can be used on the back valve ball. Lift check valve body shape and the same cut-off valve (common with the cut-off valve), so it has a larger fluid resistance coefficient. Second, the Swing Check Valve: valve around the valve seat outside the rotation of the check valve, swing check valve is more common. Third, the disc check valve: valve around the valve seat in the rotation of the check valve. Disc check valve simple structure, can only be installed on the horizontal pipe, the sealing is poor. Fourth, the pipeline check valve: valve along the valve body center line sliding valve. Pipeline check valve is a new type of valve, its small size, light weight, good processing technology, is one of the development direction of the check valve. But the fluid resistance coefficient is slightly larger than the swing check valve. More Keyword Search: Check Valve
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