Flush valve dual seal gasket

Details Flush valve dual seal gasket Flush valve dual seal gasket

E - Fixed Constructions

03

D

E03D 1/30 (2006.01) F16K 31/383 (2006.01)

Patent

CA 2373749

A flush valve includes a body with an inlet and an outlet and a valve seat at the outlet. There is a piston assembly movable in the body toward and away from the valve seat to control flow from the inlet to the outlet. There is a pressure chamber in the flush valve body which maintains the piston assembly on its valve seat. The piston assembly includes a refill orifice connecting the pressure chamber with the body inlet. There is a relief valve in the piston assembly for venting the pressure chamber to the outlet. The piston assembly includes a guide and a piston attached thereto. There is a seal having an annular perimeter portion which is positioned between facing surfaces of the guide and piston and the seal has an annular interior portion positioned on the relief valve seat to form a seal with a relief valve. The seal interior portion and perimeter portion are connected by plurality of radially extending ribs permitting a degree of relative movement between the seal interior and perimeter portions.

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