F - Mech Eng,Light,Heat,Weapons – 16 – K
Patent
F - Mech Eng,Light,Heat,Weapons
16
K
F16K 15/03 (2006.01)
Patent
CA 2111016
A fluid check valve of the two flapper variety which has replaceable seat flapper assembly. The assembly comprises a tubular ring having a seating area on the surface of one end and a reduced diameter portion on the other end. A pair of pin keepers are attached to opposite sides of the seat ring and the flappers are pivotably attached to a pin that passes through holes in the keepers. Preferably the pivot holes in the keepers or the pivot holes in the flappers or both are elongated to allow movement of the flappers along the valve axis. The seat ring is a sliding fit in the bore of the valve body and abuts against an annular rib in the valve body bore. The reduced diameter portion of the seat ring extends through the annular rib. A retaining ring is attached to the reduced diameter portion by threaded engagement, bolts, or other means and tightened until it abuts against the other side of the annular rib thus holding the seat ring in tight assembly in the valve bore against the rib.
Mcfadden Fincham
Muddiman Robert W.
LandOfFree
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