Parker-Hannifin Corporation
Open Center Control Valve Configured to Combine Fluid Flow Received from Multiple Sources

Abstract:

An example valve housing comprises: a longitudinal bore; a first and second workport passages intercepting the longitudinal bore and configured to be fluidly coupled to an actuator; a first and second return cavities intercepting the longitudinal bore; a first inlet port configured to be fluidly coupled to a first source of fluid; a second inlet port configured to be fluidly coupled to a second source of fluid; an outlet port fluidly coupled to the first and second return cavities and configured to be fluidly coupled to a reservoir; a first dual-wing passage fluidly coupled to the first inlet port; a second dual-wing passage fluidly coupled to the second inlet port; and a third dual-wing passage fluidly coupled to the second inlet port.