***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 4WEH16M7X/6EW110N9EDA (R978909527) is a high-performance directional spool valve designed for controlling the start, stop, and direction of fluid flow in hydraulic systems. This electrohydraulically actuated valve is part of the WEH series and features a main valve with housing, a control spool, one or two return springs, and a pilot control valve equipped with solenoids for operation. The main control spool is maintained in its neutral position by the return springs or through pressurization. The pilot control valve governs the flow to the spring chambers, allowing the spool to shift and connect or disconnect ports within the main valve. An optional manual override enables manual actuation of the pilot control spool without solenoid engagement. This Bosch Rexroth valve offers flexibility in its application with options for internal or external pilot oil supply and return pathways. It accommodates various mounting configurations and has porting patterns that comply with ISO standards. The valve can be configured as a 4-way or 3-way version with spring or pressure centering, and it supports both spring-end position and hydraulic-end position options. Equipped with wet-pin DC or AC solenoids that can be connected individually or through a central connection, this directional valve provides reliability in operation. Additional customization options include manual overrides, switching time adjustments, preload valves in channel P of the main valve, as well as stroke settings and spool position monitoring capabilities. The WEH series valves are intended for subplate mounting and are recognized for their robust construction and reliable performance in various hydraulic applications. They are engineered to accommodate different types of actuation—whether internal or external pilot control—making them versatile components suitable for an array of industrial uses.