H-4WEH 25 J6X/6EW110N9ETS2K4

***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 H-4WEH 25 J6X/6EW110N9ETS2K4 (R900931196) is a highly sophisticated directional control valve designed for electrohydraulic applications requiring precise control. This model features a type HWEHH design with pressure centering of the main control spool, ensuring stable operation and reliable spool positioning even without pilot pressure, which is especially useful in vertical valve installations. The main control spool is maintained in the zero position through pressurization on both front faces, with one centering bush against the housing to secure its place. This valve also incorporates return springs that hold the main control spool in a central position when depressurized and installed horizontally. It allows for external pilot oil supply via channel X from a separate pressure source, while the return is managed externally through channel Y back into the tank. For internal pilot oil supply versions (ET and E), channel P of the main valve provides this function, with internal return via channel T. The unit comes equipped with throttle inserts to manage pilot oil flow if necessary. The modifications to the pilot oil supply should only be done by authorized personnel or directly at the factory to ensure proper handling and adherence to operational parameters outlined in technical data sheets. As an electrohydraulic directional valve suitable for subplate mounting, it conforms to ISO porting patterns and can be used in 3- or 4-way configurations. It offers various actuation options including spring or pressure centering and spring or hydraulic end positions. The H-4WEH 25 J6X/6EW110N9ETS2K4 is versatile with wet-pin DC or AC solenoids, which can be connected individually or centrally depending on system requirements. Additional optional features such as manual override, switching time adjustment, preload valves in channel P of the main valve, stroke setting, and spool position monitoring cater to a wide range of application needs for enhanced operational flexibility and performance optimization.