Letdown valves

Details Letdown valves Letdown valves

1982-12-22

1990-01-09

Chambers, A. Michael

Valves and valve actuation

Valve

Materials

251355, 251361, 137375, 13724622, 138 45, F16K 3100, F16L 700

Patent

active

048922897

ABSTRACT:
A letdown valve for slurries under pressure is provided with a throttle 13 inside a housing 15 with interposed lubricant sealer and grooves 16 to accommodate any excess lubricant sealer. The throttle body 13 is held in place by a retaining ring 17 which is welded in position.

REFERENCES:
patent: Re21113 (1939-06-01), Sproull
patent: 2173022 (1939-09-01), Mitchell
patent: 2643679 (1953-06-01), Keammerer
patent: 3581728 (1971-06-01), Abraham et al.
patent: 4071041 (1978-01-01), Moran, Jr. et al.
patent: 4128109 (1978-12-01), Chervenak
patent: 4296307 (1981-10-01), Hagihara
patent: 4337920 (1982-07-01), Parris
patent: 4356997 (1982-11-01), Beffano
Driskell, Les, "Coping with High Pressure Letdown", Chemical Plants Division, Dravco Corp., 10/76.

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