Solenoid pilot operated change-over valve

Details Solenoid pilot operated change-over valve Solenoid pilot operated change-over valve

1977-09-08

1979-04-24

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

F15B 13043

Patent

active

041506952

ABSTRACT:
There is described a solenoid pilot operated change-over valve of the type using a spool/piston assembly which is movable in response to pressure prevailing in a pilot chamber, wherein the effective diameter of a drain valve seat in the pilot chamber is formed at least 1.4 times greater than that of a pilot valve seat on the piston through which the pilot chamber is communicable with an input port of the valve. The spool/piston assembly is reset to the initial position upon de-energization of the solenoid before the pilot valve seat is completely closed by a plunger.

REFERENCES:
patent: 2965132 (1960-12-01), Couffer
patent: 3913620 (1975-10-01), Pauliukonis
patent: 3916952 (1975-11-01), Pauliukonis

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