Method of operation of GESTRA dual-plate check valves

METHOD OF OPERATION

GESTRA check valves are wafer-type valves with a short overall length. Their lower weight brings advantages during transport, storage and installation. All three basic designs – BB, CB and WB – have outstanding hydrodynamic properties.

 

Closed position

The valve halves – with their metal or O-ring gasket – lie against the body seat.

Opening starts

Before the halves of the valve open, they first lift up off the central web of the body. This kinematic effect prevents wear to the sealing surfaces.

Fully opened

The opening angle is limited to 80° by the stop lugs on the valves. Additional lugs on the valve bearing ensure a stable opening position.


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