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ConnectionWafer
DesignDual plate
Size rangeDN50 - DN600
Bigger sizes available on request
Pressure ratingCLASS150/CLASS300, PN10/PN16/PN25/40
Body/discCarbon steel, stainless steel, duplex steel, super duplex steel
SealingMetal-to-Metal, NBR, EPDM, FPM
Fig.612 wafer dual check valve is a self-operating check valve where it is desirable to permit flow in one direction and prevent backflow in the opposite direction.
The disc opens in case that the upstream pressure exceeds the downstream pressure and the spring elasticity. When the flow velocity upstream decreases or ceases, the sping will automatically close the dual plates prior to flow reversal. This creats a postive shutoff against flow reversal and eliminates system surges and water hammer.
No plug design as standard - Shaft is fixed in valve body so there is no any possible leakage and potential accident.
Short face-to-face dimension.
Lighter weight, by 80-90% than non-conventional full-body check valves.
Low cracking pressure because of spring-loaded, double disc design.
Long leaf springs prevent rubbing of plate on seat.
