Rexroth 4WRTE10 4WRTE16 4WRTE25 Proportional Valve | R900954239
| Model Number | R900954239 4WRTE 10 V50L-4X/6EG24ETK31/A1M, 4WRTE10 |
|---|
Product Description
The Bosch Rexroth 4WRTE Series from LIC Hydraulic is a pilot-operated, high-performance proportional directional valve with integrated electronics (OBE) and position feedback. These valves, spanning sizes 10, 16, 25, and 32, are designed for closed-loop control systems requiring superior dynamic response and flow linearity. Models like the 4WRTE 10 V50L-4X/6EG24ETK31/A1M (R900954239) utilize a high-frequency pilot stage to drive the main spool, with an LVDT sensor providing sub-millimeter positioning accuracy. We offer 100% mechanical and functional interchangeability with original Rexroth units. Every valve undergoes 100% dynamic step-response and leakage testing to ensure zero-ripple control in precision industrial applications.
Technical Specifications (Bulleted List)
Series: 4WRTE (Size 10, 16, 25, 32)
Material Number: R900954239
Full Model Code: 4WRTE 10 V50L-4X/6EG24ETK31/A1M
Max Operating Pressure: $350\text{ bar}$ ($5075\text{ psi}$)
Rated Flow: Up to $1000\text{ L/min}$ (Size 32)
Electronics: Integrated OBE with LVDT position feedback
Input Signals: $\pm 10\text{ V}$ or $4\text{–}20\text{ mA}$ (Configuration dependent)
Seals: FKM (Viton) for high-temperature and chemical resistance
Key Technical Advantages
Advanced Pilot-Operated Stage: By utilizing a high-response pilot valve, the 4WRTE series achieves rapid main-spool shifting times that are impossible for direct-operated valves of similar flow capacities.
Plug-and-Play OBE: The integrated on-board electronics eliminate the need for external amplifier cards and long sensor cables, reducing electromagnetic interference (EMI) and simplifying electrical cabinet wiring.
Zero-Drift LVDT Feedback: The main spool position is continuously monitored by a high-resolution LVDT. This ensures exceptional repeatability and minimizes hysteresis, allowing for precise control of actuator speeds and positions.
Fail-Safe Spool Positioning: Features a defined safety position in the event of power loss or signal failure, ensuring the machinery remains in a controlled state to protect personnel and equipment.
Application Areas
Plastic & Die Casting: Precise injection speed profiling and mold-close pressure control.
Steel Mills & Metal Forming: AGC (Automatic Gauge Control) systems and heavy forging presses.
Testing Equipment: High-frequency material testing rigs and flight simulators.
Heavy Industrial Pressing: Synchronized movement of multi-cylinder pressing platforms.
Expert Maintenance Tips
Critical Filtration: Proportional valves are highly sensitive to particle contamination. Maintain system oil at ISO 16/13/10 or better. We recommend dedicated $3\text{-micron}$ pressure filtration directly upstream of the valve.
Pilot Drain Pressure: Ensure the pilot drain line (Port Y) is plumbed directly to the tank with zero restriction. Excessive backpressure in the drain line will cause the pilot stage to malfunction, resulting in spool instability.
OBE Protection: The electronics are rated for industrial environments but should be shielded from direct high-pressure washing or extreme temperature gradients. Always verify the integrity of the 11-pin or 6-pin connector seals during routine inspections.
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