The REXROTH 4WRZE25W8-220-7X/6EG24N9ETK31/F1D3M is a heavy-duty industrial proportional directional valve engineered for continuous, high-response control of flow direction and magnitude in hydraulic systems. It is a pilot-operated, two-stage valve with integrated analog amplifier and position feedback, designated by the R900746375 material number.
REXROTH 4WRZE25W8-220-7X/6EG24N9ETK31/F1D3M Technical Specifications
| Component | Proportional directional valve, pilot-operated, two-stage |
|---|---|
| Size | NG25 (CETOP 10 / ISO 4401-08) |
| Nominal Flow | 220 L/min at Δp = 10 bar per land |
| Spool Type | W8 — progressive flow characteristic, closed center |
| Pressure Rating | 315 bar (P, A, B ports); 250 bar (T port) |
| Pilot Supply | Internal, from main system |
| Actuation | Proportional solenoid, wet-pin armature, single-side control |
| Coil Voltage | 24 V DC (EG24) |
| Electrical Interface | N9 — central connector, 6-pole + PE, with integrated amplifier (ETK31) |
| Feedback | Inductive position transducer, closed-loop spool control |
| Mounting Pattern | ISO 4401-08-08-0-94, 4-bolt subplate |
| Seal Material | F1 — FKM (Viton) for mineral oil and HFD fluids |
| Series | 7X (70 to 79) |
| Design Variant | D3M — with integrated digital amplifier, command value 0 to ±10 V |
| Material Number | R900746375 |
Key Engineering Features
- Two-stage pilot-operated design with main spool position feedback for precise flow control independent of pressure and temperature variation.
- Integrated analog amplifier (ETK31) eliminates external control electronics and simplifies system wiring.
- Wet-pin proportional solenoid with high force density and low hysteresis for repeatable positioning.
- Progressive flow characteristic (W8 spool) provides fine control at low command signals and high flow at full stroke.
- FKM seals compatible with mineral oil, HFD, and environmentally acceptable fluids.
- NG25 CETOP 10 mounting for direct drop-in replacement in standard subplate manifolds.
Industrial Applications
- Injection molding machines — clamp, injection, and ejector axis control.
- Hydraulic presses — force and position regulation.
- Steel and metallurgy — continuous casting and rolling mill servo systems.
- Test stands — dynamic flow and pressure profiling.
- Marine and offshore — deck machinery and winch control.
- General industrial automation — high-cycle proportional motion control.
For technical inquiries, dimensional drawings, or replacement support for REXROTH 4WRZE25W8-220-7X/6EG24N9ETK31/F1D3M, contact the Pro-Hydraulic engineering team.
PRODUCT IMAGES
REXROTH 4WRZE25W8-220-7X/6EG24N9ETK31/F1D3M Proportional Directional Valve
âš¡ 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 REXROTH 4WRZE25W8-220-7X/6EG24N9ETK31/F1D3M Proportional Directional Valve. This precision-engineered industrial component delivers reliable fluid control for heavy-duty systems.