Product Overview
The Rexroth 4WRZE10W6-85-73/6EG24N9ETK31/A1V (material number R900978823) is a pilot-operated, two-stage proportional directional valve from the Rexroth WRZE series, size NG10 (CETOP 5 / ISO 4401-05). It is designed to control both the direction and the magnitude of flow in industrial hydraulic systems by means of a proportional solenoid acting on a pilot valve, which in turn positions the main spool. The valve provides infinitely variable, stepless control of actuator speed and direction, making it a core component in closed-loop and open-loop motion control architectures. The integrated electrical position feedback of the main spool stage (designated by the “E” in the model code) enables high dynamic response and precise repeatability when used with a suitable proportional amplifier card. This valve is a direct-fit replacement for OEM Rexroth installations and is widely deployed in demanding industrial machinery requiring accurate velocity and force regulation.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Proportional Directional Valve (pilot-operated, two-stage) |
| Model Designation | 4WRZE10W6-85-73/6EG24N9ETK31/A1V |
| Material Number | R900978823 |
| Size / Nominal Diameter | NG10 (CETOP 5 / ISO 4401-05) |
| Spool Type / Flow Characteristic | W6 spool, progressive flow characteristic, spring-centered |
| Nominal Flow (Δp = 10 bar) | 85 L/min per land |
| Operating Pressure | Up to 315 bar (P, A, B ports); pilot stage rated for high-pressure control |
| Solenoid Voltage | 24 V DC (EG24 designation) |
| Electrical Interface | N9 — with integrated position feedback and central connector, designed for proportional amplifier control |
| Seal Material | NBR (standard mineral oil compatibility) |
| Mounting & Connection | Subplate mounting per ISO 4401-05 / CETOP 5 / NFPA T3.5.1 |
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: 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 up to 315 bar and flow rates up to 85 L/min, supporting stable operation across the full working range.
Typical Industrial Applications
This valve is a direct-fit replacement for OEM Rexroth installations and is widely deployed in demanding industrial machinery requiring accurate velocity and force regulation.
PRODUCT IMAGES
Rexroth 4WRZE10W6-85-73/6EG24N9ETK31/A1V / R900978823 Proportional Directional Valve
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- Peace of Mind: Covered by our 12-Month Replacement Warranty.
Shop the genuine REXROTH 4WRZE10W6-85-73/6EG24N9ETK31/A1V / R900978823 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.