HD – 4WRZ – Proportional Directional valve
Achieve high-capacity motion control with integrated intelligence using the HD 4WRZ Series Proportional Directional Valve. Available through Thm Hydraulics, this pilot-operated valve is designed for systems that require smooth, variable control over both fluid direction and flow rate. By combining a high-response pilot stage with a robust main stage, the 4WRZ series allows for the precise management of hydraulic power with minimal electrical input. Capable of handling operating pressures up to 315 bar and flow rates up to 30 L/min (Size 10), this valve is the premier choice for industrial automation where integrated electronics and reliable performance are essential.
Core Technical Specifications:-
- Component Architecture: Pilot Operated Proportional Directional Valve
- Model Type: HD-4WRZ (Integrated Electronics)
- Maximum Operating Pressure: Up to 315 bar
- Maximum Flow Capacity: Up to 30 L/min (NG10)
- Actuation Type: Proportional Solenoid (Pilot Operated)
- Mounting Style: Sub-plate mounting
Key Features & Engineering Advantages:-
- Integrated Control Electronics: This model features built-on proportional control electronics, significantly reducing wiring complexity and eliminating the need for external amplifier cards in your control cabinet.
- Dual-Stage Control Logic: Uses a precise pilot valve to shift the main control spool. This ensures that even at high pressures, the valve responds smoothly and accurately to electrical command signals.
- Spring-Centered Reliability: Equipped with a robust spring-centering mechanism that ensures the main spool returns to a safe neutral position in the event of a power failure or signal loss.
- Unified System Source: For maximum performance and simplified commissioning, both the pilot-operated valve and the integrated proportional electronics are sourced from a single supplier, ensuring perfect factory-calibrated signal-to-flow mapping.
- Soft-Shift Dynamics: Unlike standard "on/off" solenoid valves, the 4WRZ allows you to ramp actuator speeds up and down, preventing the violent hydraulic "water-hammer" effect and protecting your system’s structural integrity.
- Universal Standard Compatibility: Designed for standardized sub-plate mounting (ISO 4401 / CETOP), allowing for a clean, professional, and leak-free "drop-in" installation on your manifold blocks.
Ideal Industry Applications:-
The integrated electronics and 315 bar endurance make the HD 4WRZ Valve the premier choice for:
- Automated Production Lines: Governing the variable speed and positioning of transfer arms, conveyor pushers, and indexing tables.
- Industrial Lifting Platforms: Providing smooth, jerk-free lifting and lowering for heavy-duty scissor lifts and material handling elevators.
- Machine Tooling Auxiliaries: Controlling the precise feed rates for secondary tooling functions, clamping circuits, and parts loaders on CNC machinery.
- Small-Scale Presses: Managing the approach and pressing velocities in automated assembly and component joining equipment.
Why Choose the HD 4WRZ Series?
- Plug-and-Play Automation: Integrated electronics mean you can connect your PLC signal directly to the valve, saving hours of installation time and reducing cabinet space requirements.
- Eliminate Hydraulic Shock: Protect your pumps, seals, and steel piping. By electronically ramping the flow, you eliminate the destructive pressure spikes caused by sudden valve shifts.
- Consistent, Reliable Performance: The pilot-operated design ensures that the valve shifts reliably even when the hydraulic fluid is cold or the system is operating under maximum load.
