4WRZE16EA150-7X/6EG24N9EK31/A1D3V

The 4WRZE16EA150-7X/6EG24N9EK31/A1D3V proportional directional valve is manufactured by Bosch Rexroth within the WRZ Proportional Directional Valves series. It regulates actuator speed and direction in hydraulic automation by converting an electrical command into a metered flow path. The valve accepts a ±10 V command value input generated by the motion controller, and the solenoid circuit is powered from a 24 V DC supply. At maximum drive the coil draws 1.8 A while operating continuously because the duty cycle is 100%. Connection to the control cabinet is made through a DIN EN 175201-804 plug, and a concealed manual override is available for setup without energizing the electronics. Installation follows the ISO 4401-07-06-0-94 mounting pattern so the size 16 subplate can be reused across similar valves. Internal pilot oil supply simplifies pipework, whereas external pilot oil drain prevents back-pressure in the control chamber. The complete unit weighs 13.6 kg, which must be supported by the manifold or machine frame.

During operation the valve can pass a nominal flow of 150 l/min at a differential pressure of 10 bar, providing the flow capacity needed for rapid cylinder or motor movement in medium-power hydraulic equipment. The main stage withstands operating pressures up to 350 bar, and the return line at port T may reach 250 bar without compromising function. Port Y is restricted to 30 bar, so auxiliary drain plumbing must maintain a lower pressure level. A proportional spool tracks the command voltage with a hysteresis no greater than 6%, holding flow deviation within tight bounds during repeated reversals. Coil insulation tolerates temperatures to 150 °C, which supports continuous heat buildup during constant energization. These flow, pressure, thermal, and accuracy limits combine to let the valve remain energized around the clock in presses, servo-hydraulic test rigs, and other automation cells that demand precise yet robust directional control.