HD – 4WRE – Proportional Directional valves
Achieve high-dynamic response and closed-loop precision with the HD 4WRE Series Proportional Directional Valve. Available through Thm Hydraulics, this direct-actuated valve is specifically engineered for advanced hydraulic systems that require absolute accuracy in both direction and flow rate. By integrating an internal electrical position feedback (LVDT), the 4WRE continuously monitors the spool position and corrects for flow disturbances in real-time. Capable of handling operating pressures up to 315 bar and flow rates up to 180 L/min, this series is the premier choice for high-performance automation where repeatable, pinpoint velocity and position control are mandatory.
Core Technical Specifications:-
- Component Architecture: Direct Actuated Proportional Directional Valve
- Model Type: HD-4WRE
- Maximum Operating Pressure: Up to 315 bar
- Maximum Flow Capacity: Up to 180 L/min
- Feedback Mechanism: Integrated Electrical Position Feedback (Closed-Loop)
- Actuation Type: Wet-pin DC Proportional Solenoids
- Mounting Style: Sub-plate mounting
Key Features & Engineering Advantages:-
- Closed-Loop Precision: The integrated electrical feedback (LVDT) ensures that the control spool stays exactly where it is commanded, even under varying flow forces. This provides a level of repeatability and precision that standard open-loop valves cannot achieve.
- High Flow Capacity (Size 6 & 10): Optimized internal galleries allow for a high volume flow of up to 180 L/min, making it versatile enough for both compact precision tasks and larger industrial power requirements.
- Wet-Pin Solenoid Technology: The DC proportional solenoids operate within the hydraulic fluid. This "wet-pin" design provides constant lubrication and heat dissipation, significantly extending the valve’s life during high-cycle industrial shifts.
- Spring-Centered Failsafe: Equipped with a robust spring-centering mechanism that returns the spool to a safe neutral position in the event of a power failure, preventing dangerous actuator drift.
- Unified Control Solutions: For maximum performance, both the high-accuracy valve and the matched electronic control amplifiers are sourced from a single supplier, ensuring perfect signal-to-spool calibration.
- Standardized Sub-Plate Mounting: Adheres to global mounting patterns, allowing for a seamless, high-performance "drop-in" upgrade for any existing manifold block.
Ideal Industry Applications:-
The high-dynamic response and 315 bar endurance make the HD 4WRE Valve the premier choice for:
- High-Speed CNC Machining: Governing the ultra-precise, variable feed rates of cutting heads where part quality depends on perfect velocity control.
- Synchronized Multi-Cylinder Systems: Ensuring multiple heavy hydraulic cylinders move in perfect unison for lifting or pressing applications.
- Advanced Injection Molding: Precisely modulating the injection speed and holding pressure phases to ensure zero-defect part production.
- Material Handling & Robotics: Enabling smooth, jerk-free movement for high-speed industrial robotic arms and delicate transfer systems.
Why Choose the HD 4WRE Series?
- Master the Nuance: Closed-loop feedback eliminates mechanical hysteresis. If you command 50% flow, you get exactly 50% flow, every single time, regardless of oil temperature.
- Protect Your Mechanical Assets: By using electronic ramping to eliminate hydraulic shock, you significantly reduce the stress on your pumps, hoses, and structural welds.
- Ready for Advanced Automation: These valves bridge the gap between heavy fluid power and digital PLC control, allowing your software to dictate every subtle nuance of the hydraulic cycle.
