Two-circuit fluid pressure control valve

A two-circuit fluid pressure control valve having a housing containing an input member acting via resilient coupling means upon a first fluid pressure responsive member, a first double valve operable dependent upon the position of said first pressure responsive member to alternatively connect a first output port to an input port or to a vent, the pressure at said first output port acting on said first pressure responsive member in a sense to oppose the action of the resilient coupling means and also acting on a second pressure responsive member, a second double valve operable dependent upon the position of said second pressure responsive member to alternatively connect a second output port to an input port or to a vent, the pressure responsive member being subject to pressure at the second output port in a sense to oppose the action thereon of the pressure at the first output port and a reaction linkage interconnecting said input menber and the second pressure responsive member for reducing hysteresis thereof in the housing, said reaction linkage being movable by said input member relative to and independent of the movement of both said first fluid pressure responsive means and said first double valve.