Hydrostatic Transmission with Shuttle Valve

This example shows a hydrostatic transmission with a shuttle valve in the Control Unit. The directional valve that controls the motor is actuated by the Hydraulic Single-Acting Valve Actuator which, in turn, is actuated by 2-position valves V_1 and V_2. The shuttle valve installed between the actuator and the valves allows the 4-way directional valve to be shifted by pressing either valve V_1 or V_2. Fixed orifice FO is installed to decrease flow consumption by the control circuit. Fixed orifice FO_1 introduces a small leak from the valve control chamber to avoid this chamber being isolated from the main flow. The motor is connected to pressure line at 1 s and 5 s by activating first valve V_1 and then valve V_2.

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