Hydraulic Proportional Valve is electronically actuated valves in which the output is changed at the same ration as inlet valve. It is used to controls the speed of a cylinder or hydraulic motor. Control electronics & proportionally designed solenoids are required for actuation. Hydraulic Proportional Valve has low cost designs without spool feedback for manual & open loop control applications. It can be direct or pilot operated. Moreover, this proportional directional valve work well in different closed loop applications.