Pilot operated change-over valve

Details Pilot operated change-over valve Pilot operated change-over valve

1996-07-12

1998-02-17

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

137271, F15B 13043

Patent

active

057182639

ABSTRACT:
A pilot operated change-over valve which can operate either as a double solenoid type or as a single solenoid type by replacement of part of its components, and includes a valve casing accommodating a valve member 8, a large diameter piston 12a and a small diameter piston 12b, an electromagnetic pilot valve 3a provided at one axial end of the valve casing 4 on the side of the large diameter piston 12a for driving same, and a common interfacial end face 6b provided at the other axial end of the valve casing 4 on the side of the small diameter piston 12b, the common interfacial end face being connectible either to a second electromagnetic pilot valve 3b for driving the small diameter piston or to an adapter plate 26 for supplying a pilot fluid constantly toward the small diameter piston.

REFERENCES:
patent: 3270776 (1966-09-01), Carls
patent: 3425449 (1969-02-01), Leibfritz
patent: 4257572 (1981-03-01), Neff
patent: 4524803 (1985-06-01), Stoll et al.
patent: 5273074 (1993-12-01), Conradt et al.
patent: 5529088 (1996-06-01), Asou
patent: 5597015 (1997-01-01), Asou et al.

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