Energized seal for orifice plate

Details Energized seal for orifice plate Energized seal for orifice plate

1990-06-11

1991-08-27

Hornsby, Harvey C.

Pipes and tubular conduits

With flow regulators and/or baffles

Restrictors

138 40, 251175, 251193, 277 3, 277 27, 277 73, F15D 102

Patent

active

050425315

ABSTRACT:
A orifice fitting for measuring gas flow in gas pipelines has an energized seal. The orifice fitting has a plate carrier which moves downward into a seat slot to position an orifice plate in the gas flow. An annular seal mounts to the plate carrier for engaging a downstream side of the seat slot. The seal is energized or pressed outwardly by hydraulic fluid pressure. The plate carrier has a chamber containing hydraulic fluid and a piston. A pin protrudes outward. The orifice fitting slide valve carrier engages and pushes the pin downward as the slide valve carrier moves to the closed position.

REFERENCES:
patent: 268679 (1882-12-01), Wendell
patent: 941536 (1909-11-01), Renaud
patent: 1996192 (1935-04-01), Daniel
patent: 4256314 (1981-03-01), Berglund
patent: 4328949 (1982-05-01), Oddenino
patent: 4343193 (1982-08-01), Dawson et al.
patent: 4633911 (1987-01-01), Lohn

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