Inventors:
Charles A. Weiler - Holly MI
Logan H. Mathis - Lavonia GA
Assignee:
Ross Operating Valve Company - Troy MI
International Classification:
F15B 13043
Abstract:
A multi-port, self-regulating, proportional control valve preferably uses a load output feedback system to produce working fluid load output pressures that are proportional to pilot control fluid pressures. In some embodiments, the control valve is programmable and capable of different load output pressures selected either prior to, or during, operation. The control valve apparatus according to the present invention is capable of a center-off or neutral condition that requires substantially no pilot control flow when there in no control valve output flow.