Development of a High Pressure Load Sensing Mobile Valve

A program was initiated in 1975 to develop a high pressure load sensing valve for the Earthmoving and Construction Equipment market, with initial focus on excavators. The need for pilot operation, higher pressures, protection in case of line rupture, and improved metering dictated a departure from conventional approaches. A meter-out element which operates independently of a meter-in element was developed By incorporating the elements in an actuator mounted valve body, objectives were met. A description of operation is presented, along with performance results.