***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 4WEH 16 EB7X/6EW110N9EDA/B08D1 (R978909443) is a highly sophisticated electrohydraulic directional spool valve designed for controlling the start, stop, and direction of fluid flow within hydraulic systems. This model is characterized by its main valve housing, control spool, return springs, and pilot control valve with solenoids for precise operation. The main control spool is maintained in the neutral position either by the return springs or through pressurization and can be actuated via the pilot control valve to connect or disconnect ports within the system. The 4WEH 16 EB7X/6EW110N9EDA/B08D1 offers various methods for pilot oil supply and return, including internal configurations through channel P or external arrangements via channels X and Y. It comes with an optional manual override feature that allows for manual actuation of the pilot control spool in cases where solenoid energization is not available. This directional valve is engineered for subplate mounting and adheres to ISO porting patterns. It provides flexibility in application with options for spring or pressure centering, as well as spring end position or hydraulic end position configurations. Solenoids can be chosen in wet-pin DC or AC types with options for individual or central electrical connections. Additional features available include switching time adjustment, a preload valve in channel P of the main valve, stroke setting, and/or spool position monitoring. These enhancements cater to specific application requirements ensuring optimal performance and reliability. It's important to note that any modifications related to pilot oil supply should only be carried out by authorized specialists or directly at the factory to ensure safety and compliance with technical specifications. The Bosch Rexroth 4WEH series valves are designed to accommodate diverse hydraulic applications where precision flow direction control is essential.