ZYB residue pump check valve classification introduced
ZYB residue pump check valve classification introduced
ZYB residue pump check valve is a form of automatic valves, and its main role is to prevent the media back to prevent the pump and drive motor reversal, and discharge the container medium. Pressure check valve which can also be used to exceed the system pressure may rise to auxiliary systems resupply pipeline. Check valve can be divided into the swing check valve ( depending on the focus of the rotation ) and lift check valves ( along the axis moves ) .
ZYB residue pump check valve according to its structure and installation can be divided into :
First, swing check valves : Swing Check the disc-shaped valve , valve seat around the shaft rotates channel , because the valve passage into streamlined , flow resistance than the lift check valves small , suitable for low flow rates and flow of large diameter changes infrequently occasions, but not for pulsatile flow , the sealing performance is less than lift . Swing Check points ill , double flap style and mostly type three, according to the three main forms of valve diameter to points, the purpose is to prevent the media back in time to stop the flow or weaken hydraulic shock .
Second, lift check valve : the valve body along the vertical centerline of the sliding valve, lift check valves can be installed in horizontal pipelines , in the small-caliber high-pressure check valve ball valve can be . Lift check valve shape and cut-off valve ( shut-off valve can be common ), so it has a larger fluid drag coefficient . Its structure is similar to the cut-off valve , and valve body with the same cut-off valve . Valve and valve cover the lower part of the upper guide sleeve is formed with Jane, Jane valve guide freely in the valve lift light guide Jane, when the media afloat , thrust open the valve by the media , when the media stops the flow , the valve by self- vertical landing on the seat, to prevent the media from the backflow effect. Straight- lift check valve seat media channels and export channel direction perpendicular to the direction ; vertical lift check valve , the direction of its media and export channels channel in the same direction with the valve seat , the flow resistance than the straight- small .
Third, the disc check valve : valve rotation around the pin within the check valve seat . Simple disc check valve structure can only be installed in horizontal pipelines , poor sealing.
Fourth, the pipeline check valve : the valve body along the centerline of the slide valve. Check valve is a valve pipe emerging , its small size , light weight , good processing , is one of the non-return valve development. But the fluid drag coefficient slightly larger than the swing check valve.
Five compression check valve : This valve is used as boiler feed water and steam off valve , it has lift check valves and globe valves or angle valve integrated function.
In addition, there - some discomfort for the pump outlet check valve installed , such as foot valve , spring- , Y -type check valves , etc. .
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