Valves for fluids

Details Valves for fluids Valves for fluids

1972-09-28

1982-09-07

Walsh, Donald P.

Valves and valve actuation

Mechanical movement actuator

Screw

251264, 251335B, F16C 3144

Patent

active

043480055

ABSTRACT:
A bellows-type valve includes several additional safeguards in the form of back-up seals which are effective to prevent in- or out-leakage should the bellows fail. Some of the seals can be changed while the valve remains closed. There is provision for testing the integrity of the seals while the valve remains operative.

REFERENCES:
patent: 1992902 (1935-02-01), McIntosh
patent: 2444703 (1948-07-01), Jones
patent: 2495081 (1950-01-01), Thomas
patent: 3137475 (1964-06-01), Schoenecker et al.

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