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BNSV Hydraulic control check eccentric hemisphere valve


The hydraulic check eccentric hemisphere valve is used at the outlet of the water pump, which can realize the two-stage closing from fast to slow, that is to prevent the water pump from over speed reversal for a long time, and to avoid or reduce the excessive water hammer caused by the backflow of medium in the pipeline, so as to protect the water pump and pipeline system.

● Operation safety. Whether it is normal pump stop or accident shutdown, it can be closed in two stages: fast and slow, to prevent the pump from over speed reversal or excessive water hammer pressure for a long time.

● It has strong applicability. The regulation range of valve closing law is wide, which can adapt to the regulation of different working conditions.

● Energy saving and consumption reduction. With full bore design, the flow channel is completely unblocked when the valve is opened, the water loss is almost zero, and the operation energy consumption is low.



Body、Valve core

D.I QT450-10、WCB


S.S 20Cr13

Spherical cap

S.S 20Cr13


S.S 304

Seal ring




Bolts and fastener

A2-70 or Galvanizing carbon steel