Low-pressure pilot valve

Details Low-pressure pilot valve Low-pressure pilot valve

1992-05-26

1992-11-17

Cohan, Alan

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

137489, 137 86, 251 86, G05D 1606

Patent

active

051634716

ABSTRACT:
An improved pilot valve is disclosed having a flow path from the inlet to the sense cavity via the valve spindle. An articulated disk is provided at the bottom of the valve spindle and is secured thereto by a hollow screw. Such articulated disk can adjust itself to the valve seat below to provide sealing of the valve to the seat in cases where the valve spindle is not perfectly axially aligned with the seat. A spacer between the upper and lower diaphragms is provided for maintenance of proper effective areas of such diaphragms and for prevention of resistance to valve stem motion.

REFERENCES:
patent: 3124147 (1964-03-01), Hallett
patent: 3477456 (1969-11-01), Powell
patent: 3583432 (1971-06-01), Powell
patent: 4284039 (1981-08-01), Bellicardi
Sales brochure by Groth Corporation--Pilot Operated Valves (undated).

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