HD – WEH – Pilot Operated Directional Valve
Master the control of massive hydraulic volumes with the HD WEH Series Pilot Operated Directional Valve. Available through Thm Hydraulics, this valve is engineered for heavy-duty industrial and mobile applications where standard direct-operated valves reach their physical flow limits. By utilizing a high-performance pilot valve to shift the main spool, the WEH series achieves smooth, precise control of fluid flows up to an incredible 1100 L/min and pressures up to 350 bar. Whether your system requires electro-hydraulic operation (WEH) or pure hydraulic piloting (WH), this series offers the modular flexibility and robust reliability needed for the world’s most demanding hydraulic circuits.
Core Technical Specifications:-
- Component Architecture: Pilot Operated Directional Spool Valve
- Actuation Type: Electro-Hydraulic (WEH) or Hydraulic (WH)
- Maximum Operating Pressure: Up to 350 bar
- Maximum Flow Capacity: Up to 1100 L/min
- Mounting Style: Subplate Mounting
- Standardization: Porting pattern to DIN 24 340 Form A, ISO 4401, and CETOP-RP 121H
Key Features & Engineering Advantages:-
- Massive Flow & High Pressure: Capable of managing up to 1100 L/min, making it the primary directional control choice for massive hydraulic cylinders and high-power industrial presses.
- Customizable Shifting Dynamics: Available with an optional shifting time adjustment. This allows engineers to "soften" the spool movement, effectively eliminating hydraulic shock and protecting the entire system from damaging pressure spikes.
- Versatile Centering & Offset: Offers multiple configuration options including spring-centered, pressure-centered, or hydraulic offset, ensuring the valve returns to your required safety position during a power or pressure loss.
- Advanced Monitoring & Safety: Can be outfitted with mechanical or inductive limit switches (proximity type) at the main spool. This provides real-time digital feedback to your PLC, confirming exact spool position for high-safety automation.
- Optional Stroke Adjustment: Features an optional stroke limiter for the main spool, allowing for precise mechanical tuning of the maximum flow rate in each direction.
- Wet-Pin Solenoid Technology: The pilot valve utilizes "wet-pin" DC or AC solenoids with removable coils, ensuring quiet operation, natural lubrication, and easy maintenance without opening the hydraulic lines.
Ideal Industry Applications:-
The monumental flow capacity and precision piloting of the HD WEH Valve make it the premier choice for:
- Heavy Industrial Presses: Managing the high-volume fluid transition required for large-scale metal forging and stamping operations.
- Marine & Offshore Engineering: Controlling high-capacity winches, heavy-duty deck cranes, and massive steering gear systems.
- Primary Metal Processing: Serving as the robust directional heart for rolling mills, furnace tilt systems, and continuous casting machinery.
- Large-Scale Construction: Operating the primary boom and auxiliary functions on massive mining excavators and specialized tunneling machines.
Why Choose the HD WEH Series?
- Smooth Control of Massive Power: Piloted operation allows you to shift thousands of pounds of fluid force with the simple flick of an electrical switch, all while maintaining a smooth, vibration-free response.
- Maintenance Made Simple: With the removable coil design and standardized mounting, your team can perform electrical or mechanical swaps in minutes, keeping your production line moving.
- Tailored to Your Machine: From stroke adjustment to proximity sensors, the WEH series is a modular platform that can be built to the exact safety and performance specifications of your project.
