Plug valve and method

Details Plug valve and method Plug valve and method

1978-07-17

1980-08-26

Schwadron, Martin P.

Fluid handling

With casing, support, protector or static constructional...

Jacketed

251184, 251309, 264320, F16K 502, F16K 2500

Patent

active

042190460

ABSTRACT:
A thermoplastic lined plug valve is prepared using a plug having a nonlocking taper and a stem at the small end of the plug. The plug is seated initially by forcing the plug into the plug cavity, raising the temperature of the plug valve above the service temperature of the valve body lining until the valve body lining conforms to the valve plug. The valve is then cooled to a temperature below the service temperature of the body lining.

REFERENCES:
patent: 2525831 (1950-10-01), Scherer
patent: 3108779 (1963-10-01), Anderson
patent: 3336939 (1967-08-01), Freed et al.
patent: 3488033 (1970-01-01), Priese
patent: 3703910 (1972-11-01), Smith
patent: 3825030 (1974-07-01), Kalsi
patent: 3916943 (1975-11-01), Hester et al.
patent: 3948284 (1976-04-01), Walworth
patent: 4108418 (1978-08-01), Ensign et al.
patent: 4136709 (1979-01-01), Rogers et al.

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