Valve assembly with removable packing

Details Valve assembly with removable packing Valve assembly with removable packing

1991-07-26

1992-04-28

Walton, George L.

Fluid handling

With repair, tapping, assembly, or disassembly means

With disassembly tool engaging feature

29235, 29264, 29282, 81 81, 137315, 251214, 277 9, F16K 1104, F16K 4300

Patent

active

051078821

ABSTRACT:
A valve assembly includes a self-contained, packing removal means for removing the valve packing. The valve assembly includes a valve stem connected at one end to a valve, a bonnet for mounting the valve stem on a valve body having a valve seat engageable with said valve on said valve stem, and means for raising and lowering said valve stem to selectively open and close said valve. The bonnet includes a packing chamber through which an intermediate portion of the valve stem extends. The packing removal means comprises a radially displaceable lifting element disposed within the valve stem and movable to an extended position where it engages the packing assembly from underneath upon operation of the valve stem to lift the valve packing from the packing chamber.

REFERENCES:
patent: 2809059 (1957-10-01), Hillis
patent: 3654686 (1972-04-01), McFarland et al.
patent: 4330917 (1982-05-01), Dzurkovich
patent: 4351512 (1982-09-01), Siver
patent: 4356832 (1982-11-01), Velan
patent: 4394872 (1983-07-01), Schobl
patent: 4944081 (1990-07-01), Ross

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