Product Overview
The Rexroth 4WS2EM16-25/200B12T315K8CV-114 (material number R900944630) is a high-response, two-stage directional servo valve engineered for precision electrohydraulic control in demanding industrial applications. Manufactured by Bosch Rexroth, this valve utilizes a torque-motor-driven pilot stage with a mechanical feedback spring to position the main spool, delivering infinitely variable flow control proportional to the electrical input signal. The 4WS2EM series is a proven platform for closed-loop position, velocity, and force control, offering exceptional dynamic response, minimal hysteresis, and high resolution. With a nominal size of NG16 and a rated flow capacity of 200 L/min at a 25 bar valve pressure drop, this servo valve serves as a critical control element in high-performance hydraulic systems requiring precise actuation and repeatable metering.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Proportional & Servo Valve (Two-Stage Directional Servo Valve) |
| Model Designation | 4WS2EM16-25/200B12T315K8CV-114 / R900944630 |
| Nominal Size | NG16 (DIN 24340 / ISO 4401 size 16) |
| Rated Flow | 200 L/min at Δp = 25 bar per land |
| Operating Pressure | Up to 315 bar (system pressure rating per model code) |
| Pilot Stage | Torque motor with mechanical feedback spring |
| Actuation | Electrohydraulic, analog electrical input signal |
| Mounting & Connection | Subplate mounting per ISO 4401 / DIN 24340, NG16 interface |
| Seal Material | FKM (Viton) — suitable for mineral oil based hydraulic fluids |
Engineering Features & Advantages
- Precision Performance: Two-stage torque-motor design with mechanical feedback delivers high-resolution spool positioning, low hysteresis, and fast dynamic response for accurate closed-loop control of flow and direction.
- High Response Dynamics: Optimized pilot stage and main spool geometry enable high frequency response, making the valve ideal for applications requiring rapid, precise actuator positioning.
- Industrial Reliability: Built for continuous operation under severe industrial conditions with robust construction, contamination-tolerant pilot filtration, and long service life.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original Rexroth OEM standards, ensuring drop-in replacement without modification to manifolds or control electronics.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original REXROTH standards, allowing straightforward retrofit into existing hydraulic systems without rework.
Typical Industrial Applications
With a nominal size of NG16 and a rated flow capacity of 200 L/min at a 25 bar valve pressure drop, this servo valve serves as a critical control element in high-performance hydraulic systems requiring precise actuation and repeatable metering.
PRODUCT IMAGES
REXROTH 4WS2EM16-25/200B12T315K8CV-114 / R900944630 Servo 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 4WS2EM16-25/200B12T315K8CV-114 / R900944630 High-Response Proportional Directional Control Valve. This Germany-made hydraulic component features a high-response pilot-operated design, delivering precise, leak-free fluid control for heavy-duty industrial systems.