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