4WE 6 D6X/OFEW220N9K4

***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 4WE 6 D6X/OFEW220N9K4 (R900906669) is a high-performance solenoid-operated directional spool valve designed for controlling the start, stop, and direction of flow in a hydraulic system. This particular model features two switching positions and two electromagnets without detent, meaning that it does not have a defined basic position when de-energized. It is capable of manual operation via an auxiliary actuation mechanism even without magnet supply, ensuring versatility in control. The valve's housing, electromagnets, control spool, and return springs are engineered for reliability and consistent performance. The soft switching behavior of this model reduces switching strokes and associated acceleration values when the valve transitions on or off, contributing to smoother operation and potentially extending the service life of the valve. Additionally, this version allows for energy-efficient operation by fixing the control spool in place with detents when energized, eliminating the need for a permanent current supply to maintain position. This Bosch Rexroth valve conforms to ISO porting pattern standards and offers flexibility with high-power solenoids that can be optionally rotated by 90 degrees. It provides electrical connection options as either single or central connections. For enhanced functionality, spool position monitoring is optional, along with CE conformity for specific electrical voltage requirements above certain thresholds. The design includes provisions for internal leakage which may increase over time; however, it ensures proper function through proper system venting. The model also addresses potential pressure peaks in drain lines by recommending separate return lines or installing check valves to prevent unintended control spool movements when using versions with detent. For applications requiring precise flow control during switching processes that exceed the performance limit of the valve, the use of a throttle insert is recommended with this model. This feature adds another layer of customization to accommodate specific operational conditions within hydraulic systems.