Pressure boost attachment for pilot valves

Details Pressure boost attachment for pilot valves Pressure boost attachment for pilot valves

1985-11-27

1986-12-30

Cohan, Alan

Fluid handling

Line condition change responsive valves

Pilot or servo controlled

137510, F16K 3112

Patent

active

046321438

ABSTRACT:
A fluid pressure boost attachment (18) is attached to a pilot valve (16) which senses the fluid pressure in a main flow line F. Upon restriction or blockage of fluid flow through inlet line (32) to pilot valve (16) the correct static fluid pressure is sensed in auxiliary fluid chamber (126) of boost attachment (18). Boost attachment (18) is actuated upon a predetermined pressure differential being reached between chambers (100) and (126) thereby to move actuator (120) and place intermediate fluid chamber (24) of pilot valve (16) in fluid communication with outlet fluid chamber (28) thereof.

REFERENCES:
patent: 2756936 (1956-07-01), Mueller
patent: 3083726 (1963-04-01), Woelfel
patent: 3754566 (1973-08-01), Gemigniani
patent: 4312374 (1982-01-01), Dowri
patent: 4327767 (1982-05-01), Fehrenbach

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