Stem packing assembly for gate valves and means for removal

Fluid handling – With repair – tapping – assembly – or disassembly means – Assembling – disassembling – or removing cartridge type valve

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Details

251 636, 251214, 277124, F16K 4300

Patent

active

041355466

ABSTRACT:
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 connected 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.

REFERENCES:
patent: 2274688 (1942-03-01), Griepenstroh
patent: 2668034 (1954-02-01), Konwal
patent: 2780233 (1957-02-01), Volpin
patent: 3064674 (1962-11-01), Carfagna
patent: 3096070 (1963-07-01), Wolfensperger
patent: 3188049 (1965-06-01), Zawacki et al.
patent: 3458172 (1969-07-01), Burrows
patent: 3770247 (1973-11-01), Nelson
patent: 3789875 (1974-02-01), McGee
patent: 3958592 (1976-05-01), Wells et al.
patent: 3993284 (1976-11-01), Lukens, Jr.

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