Double disc gate valve with replaceable spacer ring

Details Double disc gate valve with replaceable spacer ring Double disc gate valve with replaceable spacer ring

F - Mech Eng,Light,Heat,Weapons

16

K

251/73

F16K 3/00 (2006.01) F16K 3/12 (2006.01) F16K 3/30 (2006.01)

Patent

CA 1066259

DOUBLE DISC GATE VALVE WITH REPLACEABLE SPACER RING ABSTRACT OF THE DISCLOSURE A gate valve includes a pair of identically shapped tapered discs defining a tapered self-locking axially translatable gate wherein each disc has an annular hardened seating surface which engages the mating surfaces on the valve body adjacent the flow ports. Tongues on the sides of the discs ride in vertical grooves on the valve body as the gate travels between a raised open and a lowered closed position. The discs are separated by an annular spacer ring of substantially smaller diameter than the seating surfaces surrounding an inter- locking segmented hub formed on the inner juxtaposed surfaces of the discs, the arrangement being such that the spacer ring can be sized to establish an overall gate width which will ensure that the seating surfaces are making proper sealing engagement with the valve seats with the diametral differences increasing the disc flexibility. The spacer ring can be replaced by an appropriately sized spacer ring to compensate for thickness reduction in resurfacing the seating surfaces.

283061

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