Product Overview
The Rexroth 4WS2EM10-52/75B11ET315K31EV (Material Number: R900909219) is a high-response, two-stage servo directional valve engineered for precise electrohydraulic control of position, velocity, force, and pressure in demanding industrial systems. Manufactured by Bosch Rexroth, this valve utilizes a torque motor-driven pilot stage with a mechanical feedback mechanism to position the main spool proportionally to the electrical command signal. The 4WS2EM series is renowned for its exceptionally fast dynamic response, minimal hysteresis, and high resolution, making it the definitive choice for closed-loop control applications where accuracy and repeatability are critical. The “75” in the model code indicates a nominal flow capacity of 75 L/min at a pressure drop of 70 bar per land, while the “315” denotes a maximum operating pressure of 315 bar. This valve serves as a direct, high-performance interface between electronic control systems and hydraulic actuators in advanced industrial machinery.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Servo Directional Valve (Two-Stage, Proportional & Servo Valve) |
| Model Designation | 4WS2EM10-52/75B11ET315K31EV / R900909219 |
| Operating Pressure | Up to 315 bar (Rated), 350 bar (Peak) |
| Nominal Flow Rate | 75 L/min (at Δp = 70 bar per land) |
| Nominal Size | NG10 (Size 10) |
| Actuation Type | Electro-hydraulic, Torque Motor with Mechanical Feedback |
| Mounting & Connection | Subplate Mounting, ISO 4401-05 / CETOP 5 Interface |
| Electrical Interface | Integrated Amplifier Card (ET), 24V DC, Analog Command Signal |
| Seal Material | NBR (Nitrile) / FKM (Viton) depending on fluid compatibility |
Engineering Features & Advantages
- Precision Performance: The two-stage design with torque motor pilot and mechanical feedback ensures extremely high resolution, low hysteresis (<0.5%), and excellent repeatability for closed-loop position and force control.
- High Dynamic Response: Optimized for fast step responses and high-frequency command signals, enabling precise motion control in oscillating or high-cycle applications.
- Integrated Electronics (ET): The on-board amplifier card simplifies wiring, reduces installation time, and allows for fine-tuning of gain, offset, and dither directly at the valve.
- Industrial Reliability: Built for continuous operation under severe industrial conditions, with robust construction and wear-resistant internal components for extended service life.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original REXROTH standards, allowing straightforward retrofit into existing hydraulic systems without rework.
Typical Industrial Applications
This valve serves as a direct, high-performance interface between electronic control systems and hydraulic actuators in advanced industrial machinery.
PRODUCT IMAGES
REXROTH 4WS2EM10-52/75B11ET315K31EV / R900909219 Servo Directional Valve
⚡ Emergency Plant Maintenance & Ready-to-Ship Notice:
- Authentic & Fully Tested: 100% bench tested for hydraulic response, pressure rating, and null-bias stability before dispatch.
- Fast Dispatch: In-stock units ready for same-day dispatch via DHL / FedEx Express directly to your plant.
- Pre-Shipment Verification: High-definition photos, video testing runs, and serial number verification provided prior to shipment.
- Peace of Mind: Covered by our 12-Month Replacement Warranty.
Shop the genuine REXROTH 4WS2EM10-52/75B11ET315K31EV / R900909219 Solenoid Directional Control Valve. This Germany-made hydraulic component features a high-response design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.