Rexroth 4WRREH6 4WRREH10 Proportional Valve | 0811404720 | 4WRREH6VB40L-10/G24K0/B5M
| Model Number | 4WRREH6VB40L-10/G24K0/B5M |
|---|
Product Description
LIC Hydraulic specializes in providing the Rexroth 4WRREH Series, a state-of-the-art proportional directional valve designed for high-performance hydraulic axes. Featuring Integrated Electronics (OBE) and a built-in LVDT (Linear Variable Differential Transformer), the 4WRREH series offers precise spool position control with minimal hysteresis. Available in sizes 6 and 10, these valves (such as the specific 0811404720) act as a bridge between standard proportional technology and high-end servo control, providing the dynamic response necessary for complex closed-loop positioning and velocity applications.
Technical Specifications
Series: Rexroth 4WRREH (High Dynamic Proportional Valve)
Sizes: NG6 (Size 6) and NG10 (Size 10)
Material Number Example: 0811404720
Feedback: Spool position feedback via LVDT for closed-loop accuracy.
Electronics: On-Board Electronics (OBE) for “Plug & Play” integration.
Supply Voltage: $24\text{ VDC}$
Flow Capacity: Up to $40\text{ L/min}$ (Size 6) or $100\text{ L/min}$ (Size 10) depending on spool selection.
Key Technical Advantages
Exceptional Repeatability: The closed-loop spool control ensures the valve performs consistently regardless of temperature fluctuations or changing oil viscosities.
Fast Response Times: Optimized for applications requiring rapid switching or high-speed oscillation, rivaling traditional servo-valve performance.
Simplified Installation: With the amplifier integrated onto the valve, there is no need for external rack-mounted electronics, saving space and reducing EMI risks.
Diagnostic LEDs: Many models include status LEDs on the OBE housing for immediate troubleshooting of power and signal errors.
Application Areas
Injection Molding: High-speed control of injection and clamping units.
Metalworking Presses: Precise control of the slide and cushion movements.
Synchronous Lifting: Maintaining precise alignment in multi-cylinder lifting systems.
Expert Maintenance Tips
Power Supply Quality: The OBE requires a stable $24\text{V}$ power source. Voltage drops or excessive noise on the line can cause the LVDT feedback to drift or trigger a fault mode.
Zero-Point Calibration: Although pre-calibrated, minor zero-point adjustments can sometimes be made on the OBE to compensate for specific system offsets.
Avoid External Vibration: While designed for industrial use, mounting the valve on a highly vibrating structure without dampening can shorten the life of the internal LVDT sensor.
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