4WE 6 X12B6X/EG24N9K4

***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 X12B6X/EG24N9K4 (R900921993) is a high-performance directional spool valve designed for controlling the start, stop, and direction of fluid flow within hydraulic systems. This solenoid-operated valve is characterized by its robust housing, control spool, and one or two electromagnets depending on the configuration. The control spool is maintained in its initial position by return springs in its deenergized state, except for versions without a spring return. Upon energizing the electromagnet(s), the control spool shifts to enable the desired flow direction as per the selected symbol. Once de-energized, it reverts to its original position unless it's a version with detent (OF) or without spring (O), which maintains the control spool in position or lacks a defined basic position when not powered, respectively. The valve features an auxiliary actuation for manual switching without power supply and requires proper venting of the hydraulic system for optimal functionality. Designed with energy efficiency in mind, certain versions of this valve come with detent that holds the control spool in place during operation, eliminating the need for continuous current to the electromagnet. Additionally, soft-switching behavior options reduce switching strokes and associated acceleration values compared to standard valves. This Bosch Rexroth directional valve conforms to ISO porting patterns and offers various configurations including 3- or 4-way versions with or without locating holes. It supports high-power solenoids that can be optionally rotated by 90 degrees and offers electric connections as either single or central connections. Optional features include an auxiliary operating device and spool position monitoring. For electrical safety compliance, it meets CE conformity standards applicable to voltages above 50 VAC or 75 VDC and optionally includes a solenoid coil with UR marking per UL standard edition or CSA C22.2 No. approval. Notices regarding this product mention that pressure peaks can cause unintended control spool movements in detent versions; hence separate return lines or check valves are recommended. Also noted is that internal leakage may occur over time due to design principles, potentially increasing during service life. A throttle insert may be necessary under certain operating conditions where flow during switching exceeds the valve's performance limit.