Product Overview
The Rexroth 4WS2EM10-52/30B11ET315K31EV (Material Number: R900949285) is a high-response, two-stage servo directional valve engineered for precision electrohydraulic control of position, velocity, force, and pressure in demanding industrial motion systems. Manufactured by Bosch Rexroth, this valve operates on a proven nozzle-flapper pilot stage principle that hydraulically actuates a main spool, delivering exceptionally fast dynamic response, high resolution, and minimal hysteresis. With a nominal size of NG10 and a rated flow capacity of approximately 30 L/min at a 31.5 bar (315 bar rated system pressure) pressure drop per land, the 4WS2EM series is purpose-built for closed-loop control architectures where precise spool positioning and repeatable metering are critical to overall machine accuracy and throughput.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Servo Directional Valve (Two-Stage, Nozzle-Flapper Pilot Operated) |
| Model Designation | 4WS2EM10-52/30B11ET315K31EV |
| Material Number | R900949285 |
| Nominal Size | NG10 (Size 10) |
| Rated Flow | Approx. 30 L/min per land at Δp = 31.5 bar |
| Operating Pressure | Up to 315 bar (rated system pressure) |
| Spool Configuration | 4-way, 3-position, closed-center with zero-lap critical spool geometry |
| Actuation | Electrohydraulic proportional solenoid / torque motor with integrated inductive position feedback |
| Mounting & Connection | ISO 4401 / DIN 24340 NG10 subplate mounting, 4-bolt flange pattern |
| Hydraulic Fluid | Mineral oil based hydraulic fluid per DIN 51524 (HLP/HLVP), ISO VG 32–68 |
| Filtration Requirement | ISO 4406 cleanliness class 17/15/12 or better recommended |
Engineering Features & Advantages
- Precision Performance: The integrated electrohydraulic proportional solenoid / torque motor with integrated inductive position feedback ensures precise, repeatable control with low hysteresis and stable performance across the full working range.
- 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
The Rexroth 4WS2EM10-52/30B11ET315K31EV (Material Number: R900949285) is a high-response, two-stage servo directional valve engineered for precision electrohydraulic control of position, velocity, force, and pressure in demanding industrial motion systems.
PRODUCT IMAGES
REXROTH 4WS2EM10-52/30B11ET315K31EV / R900949285 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 4WS2EM10-52/30B11ET315K31EV / R900949285 High-Response Directional Servo Valve. This Germany-made hydraulic component features a high-response pilot control, delivering leak-free, reliable fluid control for heavy-duty industrial systems.
