Product Overview
The Rexroth 4WRZE25W8-325-73/6EG24N9EK31/F1V (material number R900247478) is a pilot-operated, two-stage proportional directional valve with electrical position feedback on the main stage. It is part of the Rexroth 4WRZE series, a family of high-response proportional valves designed for precise, continuous control of flow direction and magnitude in industrial hydraulic systems. The valve utilizes a proportional solenoid pilot stage to actuate the main spool, which is spring-centered and positioned via an integrated position transducer. This closed-loop control architecture delivers exceptional repeatability, minimal hysteresis, and fast dynamic response, making it suitable for demanding motion control applications where accurate velocity and position regulation are critical. The NG25 (size 25) main stage provides high flow capacity, while the W8 spool type offers a specific flow characteristic optimized for metering accuracy. The valve is designed for subplate mounting in accordance with ISO 4401 and is widely used in plastic injection molding machines, metallurgical equipment, and high-performance test rigs.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Proportional Directional Valve (Pilot-Operated, Two-Stage) |
| Model Designation | 4WRZE25W8-325-73/6EG24N9EK31/F1V |
| Material Number | R900247478 |
| Nominal Size | NG25 (Size 25) |
| Spool Type | W8 (Proportional, closed-center with specific flow characteristic) |
| Nominal Flow Rate | 325 L/min at Δp = 10 bar per land |
| Operating Pressure | Up to 315 bar (main stage); pilot stage up to 315 bar |
| Control Solenoid | Proportional solenoid, 24 V DC (EG24), with integrated position feedback |
| Electrical Interface | Component plug, 6-pin + PE (N9), with mating connector |
| Feedback Type | Integrated position transducer (EK31) for main spool closed-loop control |
| Mounting & Connection | Subplate mounting, ISO 4401-08-07-0-94 (NG25) |
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: 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 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
The valve is designed for subplate mounting in accordance with ISO 4401 and is widely used in plastic injection molding machines, metallurgical equipment, and high-performance test rigs.
PRODUCT IMAGES
REXROTH 4WRZE25W8-325-73/6EG24N9EK31/F1V / R900247478 Proportional Directional Valve
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Shop the genuine REXROTH 4WRZE25W8-325-73/6EG24N9EK31/F1V / R900247478 High Response Industrial Directional Poppet Valve. This Germany-made 24V DC hydraulic component features a high-response pilot-operated design, delivering leak-free, reliable fluid control for heavy-duty industrial systems.