Stem packing assembly for gate valves and means for removal

Details Stem packing assembly for gate valves and means for removal Stem packing assembly for gate valves and means for removal

F - Mech Eng,Light,Heat,Weapons

16

K

251/56

F16K 43/00 (2006.01) F16K 41/14 (2006.01)

Patent

CA 1072522

STEM PACKING ASSEMBLY FOR GATE VALVES AND MEANS FOR REMOVAL Bertram L. Morrison Houston, Texas Abstract of the Disclosure A packing assembly is arranged between a gate valve stem connected to an actuator and a bonnet secured to the valve body. An externally threaded packing sleeve is threaded within the bonnet and has the packing assembly removably con- nected thereto for movement with the sleeve. The packing sleeve has an outer end portion which extends into an easily disassembled actuator body where it is easily accessible to a removal tool for replacing the packing. The valve stem has a beveled shoulder thereon which engages a flexible inner flange on the bonnet in the closed position of the gate valve to provide a tight metal-to-metal surface contact between the shoulder and flange.

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