Dual backseat valve assembly

Details Dual backseat valve assembly Dual backseat valve assembly

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 3/02 (2006.01) F16K 41/14 (2006.01) F16K 41/16 (2006.01)

Patent

CA 2153431

A dual backseat valve assembly comprising: a valve body having an interior valve chamber and a generally horizontal flow passage; a valve gate adapted to reciprocate vertically within said valve chamber, said gate having a generally horizontal opening therethrough adapted to move into and out of alignment with said flow passage to effect an open or closed valve position; a valve stem adapted to be received in threaded engagement with a gate lift nut mounted in said gate such that rotation of said stem causes vertical movement of said gate; a valve bonnet fixed to said valve body receiving said stem therethrough; a stem packing assembly mounted in said bonnet and adapted to form a seal between said stem and bonnet; and means for sealing between said stem and bonnet located between said packing assembly and said valve chamber when said valve gate is in an open or closed position.

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