Product Overview
The Rexroth 4WS2EM6-22/25B11XLET315K17EV-102 (material number R901508372) is a high-response, two-stage directional servo valve from the Bosch Rexroth 4WS2EM series, engineered for precise electro-hydraulic 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 a 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 feedback spring, producing a proportional, high-resolution output flow that is essentially independent of supply pressure fluctuations. With a nominal size of 6 and a rated flow of approximately 25 L/min at 70 bar valve pressure drop per land, this servo valve delivers fast dynamic response, minimal hysteresis, and excellent repeatability, making it a direct-fit replacement for OEM Rexroth servo axes in precision motion-control applications.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Proportional & Servo Valve (Two-Stage Directional Servo Valve) |
| Model Designation | 4WS2EM6-22/25B11XLET315K17EV-102 |
| Material Number | R901508372 |
| Nominal Size | NG6 (size 6) |
| Rated Flow | Approx. 25 L/min at Δp = 70 bar per metering land |
| Pilot Stage Principle | Nozzle-flapper with torque motor and mechanical spool feedback |
| Operating Pressure | Standard Industrial Grade (up to 315 bar rated system pressure) |
| Electrical Command Interface | Proportional solenoid / torque motor, integrated valve electronics (EV) with position feedback |
| Mounting & Connection | ISO 4401 / DIN 24340 NG6 subplate interface, standard Rexroth servo valve footprint |
| Hydraulic Fluid | Mineral oil based hydraulic fluid per DIN 51524; filtration required for servo service |
Engineering Features & Advantages
- Precision Performance: The nozzle-flapper pilot stage combined with mechanical feedback delivers high-resolution spool positioning with low hysteresis, excellent linearity, and fast dynamic response for accurate closed-loop control of flow direction and magnitude.
- 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: Precision-manufactured to original REXROTH specifications for direct replacement, minimising downtime and eliminating fitment issues.
Typical Industrial Applications
With a nominal size of 6 and a rated flow of approximately 25 L/min at 70 bar valve pressure drop per land, this servo valve delivers fast dynamic response, minimal hysteresis, and excellent repeatability, making it a direct-fit replacement for OEM Rexroth servo axes in precision motion-control applications.
PRODUCT IMAGES
REXROTH 4WS2EM6-22/25B11XLET315K17EV-102 / R901508372 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.
- 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 4WS2EM6-22/25B11XLET315K17EV-102 / R901508372 Solenoid Directional Spool Valve. This Germany-made 315V hydraulic component features a high-performance spool design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.
