Bonnet nut with improved safety characteristics

Details Bonnet nut with improved safety characteristics Bonnet nut with improved safety characteristics

1990-06-06

1991-01-22

Walton, George

Fluid handling

With repair, tapping, assembly, or disassembly means

Assembling, disassembling, or removing cartridge type valve

220284, 220316, H16K 4300, G01F 2500

Patent

active

049863002

ABSTRACT:
A valve assembly includes a bonnet that is captivated in a valve body stem mount by means of a threaded bonnet nut. A pair of opposed pry holes are formed in the bonnet at a point above the top of the fully seated bonnet nut. Loosening of the bonnet nut enables a bonnet that is stuck in the body stem mount to be pried loose with a pry bar inserted in one or both of the pry holes and levered against the top of the bonnet nut. The bonnet holes also provide a visual indication of movement of the bonnet and whether there is pressure in the valve body.

REFERENCES:
patent: 3633787 (1972-01-01), Katz
patent: 4135638 (1979-01-01), Wandl
patent: 4308220 (1981-12-01), Tateno
patent: 4337788 (1982-07-01), Seger
patent: 4444220 (1984-04-01), Seger
patent: 4926898 (1990-05-01), Sampey

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