Product Overview
The Rexroth 4WRZE25W6-325-73/6EG24N9ETK31/A1D3M (Material Number R900616826) is a high-response, pilot-operated proportional directional valve from the Rexroth 4WRZE series. It is designed to control the direction and magnitude of flow in hydraulic systems proportionally to an electrical input signal, enabling precise, infinitely variable velocity and position control of actuators. The valve features a size 25 (NG25) main stage with a W6 spool type, a rated flow capacity of 325 L/min at a 10 bar (145 psi) pressure differential per land, and an integrated digital on-board electronics module (OBE) with a 24 VDC supply. The “73” design series incorporates a spring-centered main spool with position feedback via an inductive displacement transducer, ensuring high repeatability and dynamic response. The valve is equipped with a single 24 VDC proportional solenoid (EG24), an N9 (EN 175301-803 / DIN 43650) connector interface, and a “K31” electrical control variant. The “A1D3M” suffix denotes the specific spool overlap, flow characteristic, and factory-set tuning parameters. This valve is a direct-fit replacement for OEM Rexroth proportional systems and is widely used in demanding industrial motion-control applications where precise flow metering and fast response are critical.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Proportional Directional Valve (Pilot-Operated, High-Response) |
| Model Designation | 4WRZE25W6-325-73/6EG24N9ETK31/A1D3M |
| Material Number | R900616826 |
| Valve Size (Nominal) | NG25 (Size 25) |
| Spool Type | W6 (Progressive flow characteristic, closed-center, spring-centered) |
| Rated Flow Capacity | 325 L/min (at Δp = 10 bar per land) |
| Operating Pressure | Up to 315 bar (P, A, B ports); 250 bar (T port) — Standard Industrial Grade |
| Pilot Pressure | Minimum 25 bar; Maximum 315 bar |
| Electrical Supply | 24 VDC (EG24 solenoid) |
| Electrical Connector | N9 (EN 175301-803 / DIN 43650, 3-pole + PE) |
Engineering Features & Advantages
- Precision Performance: The proportional directional valve (pilot-operated, high-response) 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 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 325 L/min, supporting stable operation across the full working range.
Typical Industrial Applications
This valve is a direct-fit replacement for OEM Rexroth proportional systems and is widely used in demanding industrial motion-control applications where precise flow metering and fast response are critical.
PRODUCT IMAGES
REXROTH 4WRZE25W6-325-73/6EG24N9ETK31/A1D3M / R900616826 Proportional Directional Valve
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Shop the genuine REXROTH 4WRZE25W6-325-73/6EG24N9ETK31/A1D3M / R900616826 High-Response Solenoid Directional Valve. This Germany-made 24V DC hydraulic component features a high-response pilot stage, delivering leak-free, reliable fluid control for heavy-duty industrial systems.