***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 3WRCE 50 V720L-2X/SG24K31/C5M-131 (R901166968) is a high-response stage valve designed to precisely control the quantity and direction of flow within control loops. This advanced product features a stage pilot control valve equipped with a dry torque motor, low-friction nozzle flapper, and an amplifier that includes mechanical feedback for spool position. The main stage is responsible for regulating flow, while an inductive position transducer—integral to the spool—provides accurate spool positioning. The functionality of this valve relies on its ability to compare command values with actual values, with the torque motor being actuated proportionally based on any control deviation. The pilot control valve adjusts accordingly to manage the flow into control chambers A and B, which in turn actuate the main spool. It's important to note that the flow is also dependent on the pressure drop across the valve. Unique features of this Bosch Rexroth valve include factory-set V spool opening points, which can be readjusted after replacement via a zero adjustment potentiometer. Additionally, during pilot control valve or electronics replacement, no settings adjustments are necessary except for this zero adjustment at the position transducer. The pilot control valve is designed to ensure that in case of a power failure, pilot pressure opens the main stage from A to T or closes P to A. The spring behind the main spool ensures that P to A remains closed when no pressure is applied—for instance, before installation or after pressures are reapplied following tool changes. Furthermore, integrated control electronics compensate for any trimming discrepancies in the pilot valve. This high-response block installation design valve is suitable for various applications including position, pressure force, and velocity controls. It finds typical use in presses, die casting machines, and nibbling axes among other precision-demanding applications where accurate hydraulic flow management is critical.