Plug and ball injector valve

Details Plug and ball injector valve Plug and ball injector valve

1981-04-24

1982-11-23

Roberts, Edward L.

Brushing, scrubbing, and general cleaning

Implements

Pipe, tube, or conduit cleaner

137268, B08B 904

Patent

active

043597971

ABSTRACT:
A plug and ball injector valve is provided which utilizes seals mounted in standard grooves and an arrangement of pressure balancing cavity areas brought into communication with the seals to balance the fluid pressure across the seals before such seals are exposed to unpressurized ports or passageways. A drain port is arranged in the vicinity of the loading port of the valve to limit spillage and leakage of the line fluid passing through the valve.

REFERENCES:
patent: 2977617 (1961-04-01), Willis
patent: 3000028 (1961-09-01), Buie et al.
patent: 3063079 (1962-11-01), Bergman et al.
patent: 3063080 (1962-11-01), Bergman et al.
patent: 3146477 (1964-09-01), Bergman et al.
patent: 3848621 (1974-11-01), Dickenson et al.
patent: 4044418 (1977-08-01), Ishii et al.

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