H-4WEH25J6X/6EG24N9EK4/10B12D3SO256

***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-4WEH25J6X/6EG24N9EK4/10B12D3SO256 (R901208521) is a high-performance directional control valve designed for electrohydraulic applications. This valve is engineered for subplate mounting and conforms to ISO porting patterns, making it versatile for various hydraulic systems. It can be utilized in either a 3-way or 4-way configuration and features options for spring or pressure centering, as well as spring end position or hydraulic end position. Equipped with wet-pin DC or AC solenoids, the H-4WEH25J6X/6EG24N9EK4/10B12D3SO256 offers reliable actuation and can be configured with individual or central electrical connections. The valve includes additional optional features such as manual override, switching time adjustment, a preload valve in channel P of the main valve, stroke setting, and spool position monitoring to cater to specific application requirements. The product's design ensures that the main control spool is held in the zero position by pressure centering. When pilot pressure is absent, return springs maintain the spool's central position even if the valve is mounted vertically. However, due to its design principle, some internal leakage may occur over time. This model provides flexibility in pilot oil supply and return paths with both internal and external options available depending on the specific type designation (HWEHH, HWEHE, HWEH...ET..., HWEH...T...). For instance, internal pilot oil supply can be sourced from channel P of the main valve while external pilot oil return can be directed via channel Y into the tank. The use of a throttle insert may be necessary to regulate pilot oil flow within certain configurations. It's important to note that any modifications related to pilot oil supply should only be carried out by authorized specialists or at the factory to ensure proper operation and adherence to maximum operating parameters as detailed in the technical data sheet. This includes observing minimum and maximum pilot pressures and installing appropriate throttle inserts where necessary. The inclusion of a pressure reducing valve may also be required in conjunction with certain versions of this model for optimal performance.