Tag: directional control valve

Written by Joji Parambath

Circuits for Closed-circuit Hydro-static Transmissions (HSTs)

In a closed-circuit hydrostatic transmission (HST) system, a hydraulic pump drives a hydraulic motor. In the closed-circuit HST system, the fluid discharged from the hydraulic motor outlet flows directly to the pump inlet, thus forming a power transmission loop. The transmission loop has a high-pressure side and a low-pressure side. The pressure on the high-pressure […]

Written by Joji Parambath

Group Changing Pneumatic Circuit for Four Cascade Groups

The figure below illustrates different positions of a group-changing pneumatic circuit for four cascade groups used to eliminate signal conflicts. Three pilot-operated 5/2 DC valves (reversing valves) are used to realize the group-changing circuit. Figure | Different power supply positions of a four-group circuit Initially, the supply is in the last group, G4, as shown […]