***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-4WEH25R6X/6EW110N9ETK4 SO382 (R978019627) is a sophisticated electrohydraulic directional control valve designed for subplate mounting with a porting pattern in compliance with ISO standards. This valve is a 4-way version featuring both spring and pressure centering to ensure the main control spool is held in the zero position by pressurization of its two front faces. It is equipped with wet-pin DC or AC solenoids, which can be connected either individually or centrally, depending on application requirements. The model boasts several optional features such as manual override, switching time adjustment, a preload valve in channel P of the main valve, and provisions for stroke setting and/or spool position monitoring. The pilot oil supply for this unit can be configured either externally via channel X from a separate pressure source or internally from channel P of the main valve. Similarly, pilot oil return can be routed externally through channel Y into the tank or internally via channel T. For internal pilot oil versions labeled ET and E, there are specific minimum pilot pressures to observe as per technical data provided by Bosch Rexroth. To prevent excessively high-pressure peaks that could occur in these configurations, a throttle insert may be required in port P of the pilot control valve. This model also includes return springs that hold the main control spool in central position without pilot pressure even when mounted vertically. However, it's important to note that due to its design principle, some internal leakage is inherent to these valves and may increase over their lifecycle. The H-4WEH25R6X/6EW110N9ETK4 SO382 offers versatility for various applications requiring precise hydraulic flow control with multiple actuation types and advanced features for enhanced performance and reliability.