Product Overview
The Rexroth 4WRZE 25 W8-325-72/6EG24N9K31/F103M (Material No. R901014940) is a pilot-operated, two-stage proportional directional valve with electrical position feedback on the main stage. Manufactured by Bosch Rexroth, this valve is part of the proven 4WRZE series, which is widely recognized for its high flow capacity, precise spool positioning, and excellent dynamic response in demanding industrial hydraulic systems. The valve operates on a proportional solenoid principle: an electrical command signal is applied to the pilot-stage proportional solenoids, which displace the pilot spool. The pilot pressure then actuates the main spool, whose position is continuously monitored and fed back via an integrated position transducer, ensuring accurate and repeatable flow control proportional to the input signal. With a nominal size of NG25 and a rated flow capacity of approximately 325 L/min at a 10 bar pressure drop per land, this valve is engineered for high-performance applications requiring precise directional and flow control of large hydraulic actuators. The 4WRZE series is a direct-fit, high-reliability solution for original Rexroth proportional valve replacements and new system designs alike.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Proportional Directional Valve (Pilot-Operated, Two-Stage) |
| Model Designation | 4WRZE 25 W8-325-72/6EG24N9K31/F103M |
| Material Number | R901014940 |
| Nominal Size | NG25 (DIN 24340 / ISO 4401) |
| Spool Type / Flow Characteristic | W8 — Progressive flow characteristic, closed-center spool |
| Rated Flow Capacity | Approx. 325 L/min at Δp = 10 bar per metering land |
| Operating Pressure | Up to 315 bar (system pressure, port P); pilot pressure up to 250 bar |
| Pilot Stage Actuation | Proportional solenoids, 24 V DC (EG24), with integrated position feedback |
| Electrical Connection | Component plug, 6-pin + PE (N9), standard Rexroth interface |
| Mounting & Connection | Subplate mounting, ISO 4401-08 / NG25 interface, 4-bolt flange |
Engineering Features & Advantages
- Precision Performance: The proportional directional valve (pilot-operated, two-stage) delivers precise, repeatable performance with low hysteresis and stable control 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 OEM standards, ensuring drop-in replacement without modification to existing manifolds or piping.
- Rated Capability: Rated for pressure ratings up to 315 bar and flow rates up to 325 L/min, supporting stable operation across the full working range.
Typical Industrial Applications
With a nominal size of NG25 and a rated flow capacity of approximately 325 L/min at a 10 bar pressure drop per land, this valve is engineered for high-performance applications requiring precise directional and flow control of large hydraulic actuators.
PRODUCT IMAGES
Rexroth 4WRZE 25 W8-325-72/6EG24N9K31/F103M / R901014940 Proportional Directional Valve
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Shop the genuine REXROTH 4WRZE 25 W8-325-72/6EG24N9K31/F103M / R901014940 Solenoid Directional Valve. This Germany-made 24V DC hydraulic component features a high-response pilot control, delivering leak-free, reliable fluid control for heavy-duty industrial systems.