Product Overview
The Rexroth 4WS2EM10-52/60B11ET315K8DV (Material No. R901020256) is a high-response, two-stage servo directional valve from the Bosch Rexroth 4WS2EM series, engineered for precise electrohydraulic control of position, velocity, force, and pressure in demanding closed-loop industrial systems. The valve operates on a nozzle-flapper pilot principle: an electrical command signal drives a torque motor that positions the flapper between two nozzles, generating a differential pilot pressure that deflects the main spool. The spool stroke is fed back mechanically to the torque motor via a bending spring, producing a proportional, high-resolution output flow with exceptional dynamic response and minimal hysteresis. With a nominal size of NG10 and a rated flow of 60 L/min at 315 bar, this servo valve is a direct-fit, high-performance solution for precision motion control applications where repeatability and fast response are critical.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Servo Directional Valve (Two-Stage, Nozzle-Flapper Pilot) |
| Model Designation | 4WS2EM10-52/60B11ET315K8DV |
| Material Number | R901020256 |
| Nominal Size | NG10 (Size 10) |
| Rated Flow | 60 L/min per land at Δp = 35 bar |
| Operating Pressure | Up to 315 bar (rated), 350 bar (peak) |
| Pilot Stage | Nozzle-flapper with torque motor and mechanical bending-spring feedback |
| Spool Configuration | 4-way, 3-position, closed-center (zero overlap) |
| Electrical Interface | Proportional solenoid / torque motor, ±10 V or ±mA command signal |
| Mounting & Connection | ISO 4401 / DIN 24340 NG10 subplate mounting, 4-bolt flange |
| Seal Material | NBR (Buna-N), suitable for mineral oil-based hydraulic fluids |
Engineering Features & Advantages
- Precision Performance: The servo directional valve (two-stage, nozzle-flapper pilot) delivers precise, repeatable performance with low hysteresis and stable control across the full working range.
- Industrial Reliability: Designed for dependable long-term operation in demanding industrial environments, with quality bearings and sealing systems ensuring extended maintenance intervals.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original REXROTH standards, allowing straightforward retrofit into existing hydraulic systems without rework.
- Rated Capability: Rated for pressure ratings up to 315 bar and flow rates up to 60 L/min, supporting stable operation across the full working range.
Typical Industrial Applications
With a nominal size of NG10 and a rated flow of 60 L/min at 315 bar, this servo valve is a direct-fit, high-performance solution for precision motion control applications where repeatability and fast response are critical.
PRODUCT IMAGES
REXROTH 4WS2EM10-52/60B11ET315K8DV / R901020256 Servo Directional Valve
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Shop the genuine REXROTH 4WS2EM10-52/60B11ET315K8DV / R901020256 High-Response Directional Control Valve. This Germany-made hydraulic component features a high-response pilot-operated design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.