Valve system and arrangement for on-line valve replacement

Details Valve system and arrangement for on-line valve replacement Valve system and arrangement for on-line valve replacement

1988-10-28

1990-06-05

Look, Edward K.

Motors: expansible chamber type

Fluid supply through diverse paths to single expansible chamber

Activation of one path disables second path

91418, 137884, 137863, 137869, 251149, F15B 1304

Patent

active

049304011

ABSTRACT:
Several embodiments are disclosed of an automatic shutoff valve apparatus for permitting removal, repair, or replacement of a control valve from a mounting base without deactivating a complete system. In addition, a redundancy arrangement is disclosed wherein the shutoff valve apparatus and at least two control valves are employed in parallel so that the device activated by the control valves can be maintained operative when one control valve malfunctions or is removed, repaired, or replaced.

REFERENCES:
patent: 2635584 (1953-04-01), Jacques
patent: 3505929 (1970-04-01), Coppola et al.
patent: 3813990 (1974-06-01), Coppola et al.
patent: 4054154 (1977-10-01), Mason
patent: 4257311 (1981-03-01), Barnsley et al.
patent: 4280531 (1981-07-01), Milberger et al.

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