4WREE6E32-2X/G24K31/A1V Rexroth Proportional Directional Valve 315bar
| Model Number | 4WREE6E32-2X/G24K31/A1V R900907114 |
|---|
Product Description
Product Overview
The 4WREE6E32-2X/G24K31/A1V (material number R900907114) is a Bosch Rexroth direct-operated proportional directional control valve featuring electrical position feedback and integrated on-board electronics (OBE). Designed to ISO 4401-03-02-0-05 (NG6 / CETOP 03) mounting standards with a spring-centered control spool, it precisely controls the direction and magnitude of hydraulic flow. Every unit undergoes rigorous 100% simulated operating-condition testing and offers excellent drop-in interchangeability with equivalent NG6 proportional directional valves. The closed-loop position control delivers low hysteresis, high repeatability, and superior dynamic response, making it ideal for industrial hydraulic systems that demand high control accuracy and reliability.
Technical Specifications
- Model: 4WREE6E32-2X/G24K31/A1V
- Material number: R900907114
- Valve type: Direct-operated proportional directional control valve with electrical position feedback and integrated electronics (OBE)
- Nominal size: NG6 (Size 6)
- Mounting interface: ISO 4401-03-02-0-05
- Spool symbol: E
- Rated flow (Δp = 10 bar): 32 l/min
- Maximum flow: 80 l/min (Size 6)
- Maximum operating pressure: 315 bar (ports P, A, B); 210 bar at port T
- Control method: Proportional solenoids + electrical position feedback + integrated electronics (OBE)
- Supply voltage: 24 VDC (G24)
- Electrical connection: K31 (7-pole connector according to DIN EN 175201-804, without mating connector)
- Electronic interface: A1 (command value ±10 V)
- Seal material: V = FKM
- Component series: 2X (20…29, unchanged installation and connection dimensions)
- Weight: approx. 2.4 kg
- Protection class: IP65 (with correctly mounted mating connector)
- Hydraulic fluid compatibility: HL, HLP, HLPD, HVLP, HVLPD, HETG, HEES, HEPG, HFDU, HFDR
Key Technical Advantages
- Closed-loop position feedback with integrated OBE: Built-in electrical position sensor and on-board electronics enable precise closed-loop spool positioning, delivering low hysteresis and high repeatability—significantly superior to open-loop proportional valves.
- High dynamic response and spring-centered design: Proportional solenoids combined with spring centering provide fast response and reliable return to neutral on power loss, enhancing system safety for applications requiring rapid directional changes and accurate flow modulation.
- Precision machining and reliable sealing: High-accuracy valve body and spool manufacturing with FKM seals ensure compatibility with a wide range of hydraulic fluids, low internal leakage, and high volumetric efficiency for long-term stable operation.
- True drop-in interchangeability and easy installation: Strict compliance with ISO 4401-03 mounting face and standardized electrical interface allows direct replacement of equivalent NG6 proportional directional valves, minimizing system modification costs and downtime.
- Comprehensive diagnostics and protection: Integrated electronics include overload and overheating protection, with monitor signals providing real-time spool position feedback to improve system maintainability and reliability.
Application Areas
Injection moulding machines, die-casting machines, metal-forming equipment, plastics machinery, machine-tool hydraulics, packaging machinery, automated production lines requiring precise cylinder or motor direction and flow control, and other medium-to-high-pressure hydraulic systems demanding closed-loop proportional performance.
Expert Maintenance Tips
- Verify mounting surface flatness and roughness before installation; use specified M5 bolts and tighten to the recommended torque; fit seals correctly to prevent external leakage.
- Maintain recommended fluid cleanliness per ISO 4406; use hydraulic fluids compatible with FKM seals. Thoroughly bleed the system before first start-up to avoid cavitation and noise.
- Use shielded cables for electrical connections, separate signal and power lines, and ensure EMC compliance. After power-up, verify monitor signals; keep the command value strictly within ±10 V.
- Periodically inspect solenoid coil temperature and connector sealing integrity; never exceed recommended operating temperatures. Clean and protect the valve during long-term storage and perform functional/leak tests before recommissioning.
- Do not disassemble the position transducer or integrated electronics housing, as this will invalidate factory calibration. Seal replacement or repairs should be performed only by technicians experienced with Rexroth products.
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