4WRAB6EA25-1X/G12N9K4/MR

The 4WRAB6EA25-1X/G12N9K4/MR valve is a proportional directional valve produced by Bosch Rexroth in the 4WRA Proportional Directional Valves series. It meters hydraulic flow to actuators under closed-loop electronic control for automated machinery. With a nominal size of 6, the housing matches compact manifold cavities common in light to medium power circuits. The nominal flow rating is 25 l/min so the valve can maintain this rate with an appropriate pressure drop during normal operation. Two discrete spool positions provide extend and retract functions for double-acting cylinders, and the spool is identified by symbol EA to define its porting arrangement. A 12 VDC supply feeds the solenoid, while a maximum solenoid current of 2.5 A allows the controller to drive the spool proportionally across its stroke. The coil resistance is 4.8 Ω at 20 °C, giving designers a fixed value for current calculation, and continuous duty cycle capability permits the coil to remain energized without mandatory cool-down intervals.

This model supports peak demands beyond the nominal rating by allowing a maximum flow of 30 l/min when the pressure drop and amplifier current are increased. Pressure limits reach 350 bar on the P, A, and B ports, and 210 bar on the T port, ensuring the housing and seals withstand typical system pressures. The ISO 4401-03-02-0-05 mounting interface aligns with standardized subplates so installation requires no custom machining. Electrical connection is through an EN 175301-803 plug coded K4, enabling quick field replacement without special tools. A covered N9 manual override lets maintenance staff shift the spool mechanically during commissioning or power loss. Fluid isolation relies on NBR seals marked MR, suitable for petroleum-based hydraulic oils across the stated temperature range. The designation 1X identifies the component series version, confirming compatibility with current spare parts and accessories within the 4WRA range.