Product Overview
The Rexroth 4WS2EM10-45/20B3ET315K8DM (Material No. R900396847) is a high-response, two-stage servo directional valve engineered for precision electrohydraulic control of position, velocity, force, and pressure in demanding closed-loop industrial systems. As a member of the Bosch Rexroth 4WS2EM series, this valve utilizes a torque-motor-driven pilot stage with a nozzle-flapper or jet-pipe principle to actuate a precision-machined main spool, delivering exceptionally fast dynamic response and high-resolution flow metering. The “10” size designation corresponds to NG10 (nominal size 10) mounting, while the “45” indicates a rated flow capacity of approximately 45 L/min at a 35 bar valve pressure drop per land. The “315” rating denotes a maximum operating pressure of 315 bar, making this valve suitable for high-pressure servo applications. With its integrated inductive position feedback and precise spool-land geometry, the 4WS2EM10-45 provides superior repeatability, minimal hysteresis, and excellent null stability, making it the preferred choice for critical motion control loops in injection molding, metallurgy, and testing machinery.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Servo Directional Valve (Two-Stage, Electrohydraulic) |
| Model Designation | 4WS2EM10-45/20B3ET315K8DM |
| Material Number | R900396847 |
| Nominal Size | NG10 (Size 10) |
| Rated Flow Capacity | ≈ 45 L/min at Δp = 35 bar per land |
| Maximum Operating Pressure | 315 bar (P, A, B ports); T port limited to 160 bar |
| Pilot Stage Principle | Torque-motor with nozzle-flapper / jet-pipe pilot |
| Spool Configuration | Critical-center, zero-lapped spool with position feedback |
| Electrical Interface | Proportional solenoid / torque motor with integrated inductive position transducer |
| Mounting & Connection | ISO 4401-05 / NG10 subplate mounting; CETOP 5 interface |
Engineering Features & Advantages
- Precision Performance: The servo directional valve (two-stage, electrohydraulic) delivers precise, repeatable performance with low hysteresis and stable control across the full working range.
- Industrial Reliability: Constructed for continuous duty with durable, corrosion-resistant materials and proven engineering for maximum system uptime.
- 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 of 315 bar (P, A, B ports); T port limited to 160 bar and flow rates up to 45 L/min, supporting stable operation across the full working range.
Typical Industrial Applications
The “315” rating denotes a maximum operating pressure of 315 bar, making this valve suitable for high-pressure servo applications.
PRODUCT IMAGES
REXROTH 4WS2EM10-45/20B3ET315K8DM / R900396847 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.
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- Peace of Mind: Covered by our 12-Month Replacement Warranty.
Shop the genuine REXROTH 4WS2EM10-45/20B3ET315K8DM / R900396847 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.