Knife gate valve with semi-hard, resilient seat

Details Knife gate valve with semi-hard, resilient seat Knife gate valve with semi-hard, resilient seat

F - Mech Eng,Light,Heat,Weapons

16

K

251/73

F16K 3/02 (2006.01) F16K 3/316 (2006.01)

Patent

CA 1286649

KNIFE GATE VALVE WITH SEMI-HARD, RESILIENT SEAT Abstract of the Disclosure A knife gate valve comprises a body member to which two aligned conduits are attached. The body member has a U-shaped internal recess of predetermined length formed within it. A removable sealing member fits within the recess and extends along its entire length. The sealing member includes a bearing portion and a resilient backing portion that are positioned face-to-face to each other. The bearing portion comprises a flexible plastic-type material having a self-lubricating, semi-hard surface that contacts the blade portion of the gate as it slides along the length of the recess to close the valve. The resilient backing member com- prises an elastomer strip that contacts the bearing portion surface that is opposite to the blade portion contacting sur- face. The resilient backing portion yields to the pressure exerted by the gate as it closes, thereby to provide a tight seal for the valve.

520994

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