Performances of Oil Hydraulic Control Valves

Abstract

Oil hydraulic control valves are used in an oil hydraulic system with an oil hydraulic pump or an oil hydraulic motor, etc. From the view-point of their functions they are roughly classified into three types, that is, pressure, flow and directional control. The author made experiments on some typical hydraulic control valves, and compared the results with those of analyzing all performances of the valve to make their performances clear ; they are the performances of the direct and pilot valve type relief valve, the reducing valve, the second pressure of which is constant, the flow control valve with pressure compensator and the spool valve.