Product Overview
The Rexroth 3DREP 6 C-21/25EG24N9K4/M (Material Number R900958817) is a direct-operated, three-way proportional pressure reducing valve designed for precise, infinitely variable pressure control in industrial hydraulic systems. As a member of the Rexroth 3DREP series, this valve reduces a primary system pressure to a lower, electrically proportional secondary pressure at port A, while simultaneously providing pressure relief from port A to tank port T. The valve features a proportional solenoid with central electrical connection and integrated control electronics, enabling stepless adjustment of the regulated output pressure in direct proportion to the electrical command signal. This design makes it ideal for applications requiring accurate, dynamic pressure regulation with minimal hysteresis and fast response characteristics.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Proportional Pressure Reducing Valve (Pressure Control Valve) |
| Model Designation | 3DREP 6 C-21/25EG24N9K4/M |
| Material Number | R900958817 |
| Size / Nominal Diameter | NG6 (CETOP 3 / ISO 4401-03) |
| Operating Pressure | Up to 315 bar (system pressure at port P) |
| Regulated Output Pressure | Up to 25 bar (pressure range code 25) |
| Nominal Flow Rate | Up to 30 L/min (dependent on pressure differential) |
| Actuation Type | Proportional solenoid, single solenoid with spring return |
| Electrical Supply | 24 V DC (EG24 designation), nominal solenoid voltage |
| Electrical Connection | Central connector with integrated control electronics (K4 designation) |
| Seal Material | NBR (N9 designation), suitable for mineral oil-based hydraulic fluids |
| Mounting & Connection | Subplate mounting per ISO 4401-03 / CETOP 3, 4-way interface |
Engineering Features & Advantages
- Precision Performance: The proportional pressure reducing valve (pressure control valve) 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 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 30 L/min, supporting stable operation across the full working range.
Typical Industrial Applications
This design makes it ideal for applications requiring accurate, dynamic pressure regulation with minimal hysteresis and fast response characteristics.
PRODUCT IMAGES

REXROTH 3DREP 6 C-21/25EG24N9K4/M / R900958817 Proportional Pressure Reducing Valve
⚡ 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 genuine REXROTH 3DREP 6 C-21/25EG24N9K4/M / R900958817 Proportional Directional Control Valve. This Germany-made 24V DC hydraulic component features a direct-operated spool design, delivering precise, leak-free fluid control for heavy-duty industrial systems.