DIRECTIONAL SPOOL VALVE 4WE10HA5X/EW120N9K4/M

***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Bosch Rexroth directly.***
The Bosch Rexroth 4WE10HA5X/EW120N9K4/M (R901487126) is a high-performance directional spool valve designed for controlling the start, stop, and direction of fluid flow within a hydraulic system. This solenoid-actuated valve is comprised of a robust housing, up to two electronic solenoids, a control spool, and return springs to ensure reliable operation. The control spool remains in the central or initial position when deenergized, held by return springs, except for specific versions without spring return. When energized, the wet-pin electronic solenoids shift the control spool from its rest position to an end position that allows for the desired flow direction. Once the solenoid is deactivated, the control spool returns to its central or initial position unless it's equipped with an OF detent or lacks type O spring. These particular models maintain their position due to detents that lock the control spool in place, enabling energy-efficient operation by reducing the need for continuous current. Additionally, this valve features a manual override for non-electric actuation and requires oil within the pressure chamber of the solenoid for proper functionality. Throttle inserts can be used in various channels (P, A, B or T) to manage flow resistance and adapt to operational demands that exceed valve capacity. This versatile unit can be configured as a 3 or 4-way version with porting patterns according to ISO standards. It comes with high-power solenoids that can optionally be rotated by 90° and offers various electrical connection options including individual or central connections. Compatibility with PWM connectors and fast switching amplifiers are available for enhanced performance while optional auxiliary operating devices provide additional flexibility. The valve adheres to CE conformity requirements under the Low-Voltage Directive EC for electrical voltages greater than 50 VAC or 75 VDC and includes a UL-approved solenoid coil. Approval according to CSA C22.2 No. 139 is optional for this model. Users should note that pressure peaks in tank lines can cause unintended movements of control spools in valves with detents; separate return lines or check valves are recommended solutions.