Valve

Details Valve Valve

1988-03-14

1989-07-04

Walton, George L.

Valves and valve actuation

Mechanical movement actuator

Particularly packed or sealed

251223, 251225, 277111, 277125, F16K 4104

Patent

active

048444111

ABSTRACT:
A cryogenic valve having a valve seat in the valve body adapted to be closed by a conical seat disc. The seat disc is supported for vertical movement in a seat holder which is carried by an elongated stem that extends through the valve bonnet. The stem and bonnet are sealed by a series of compressed Teflon and brass rings concentric with and between the upper end of the valve bonnet and the stem. The rings are axially compressed between a flange formed in the valve bonnet and a sleeve follower which in turn is secured by a packing nut. The Teflon rings have holes therethrough and/or roughened surfaces to provide improved sealing.

REFERENCES:
patent: 1988258 (1935-01-01), Yardley
patent: 3048362 (1962-08-01), Scarborough
patent: 3559950 (1971-02-01), Nelson
patent: 3801112 (1974-04-01), Dumazet
patent: 4486002 (1984-12-01), Reiss et al.
patent: 4516752 (1985-05-01), Babbitt et al.
patent: 4572519 (1986-02-01), Cameron et al.
patent: 4643440 (1987-02-01), Massey, Jr.

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