WD Series Hydraulic Directional Control Valve | D03/D05 Solenoid Valve Replacement

Genlu Hydraulic proudly introduces our WD Series high-performance solenoid-operated directional control valves. Engineered for industrial automation and heavy-duty hydraulic circuits, these valves provide precise control over flow direction and termination. The WD series serves as a precise match for international technical standards, comprehensively covering WD-G02 (D03/NG6) and WD-G03 (D05/NG10) specifications, and offering perfect compatibility for configurations such as WD-G03-B3B-D2-N and WD-G02-B10B-D2-N. Genlu unequivocally guarantees 100% Drop-in Interchangeability in ISO 4401 mounting interfaces, solenoid wiring logic, port layouts, and pressure handling. Backed by our uncompromising 100% Simulation Load Testing, each unit is validated for shifting response, solenoid temperature stability, and sealing integrity before dispatch, ensuring relentless, shock-free, and precise control for your hydraulic systems.

Technical Specifications 

• Product Series: WD Series Solenoid Directional Control Valve (G02/G03)

• Representative Models: WD-G03-B3B-D2-N, WD-G02-B10B-D2-N

• Mounting Standard: ISO 4401 (NG6/D03 or NG10/D05)

• Max Operating Pressure: 315 bar (4500 PSI)

• Rated Flow: 50 – 120 L/min (Model-dependent)

• Standard Voltage: DC 24V (Optional AC 110V/220V)

• Fluid Compatibility: Mineral oils, water-glycol, etc.

• Seal Material: High-performance NBR or Viton

Key Technical Advantages:

• Wet-Armature Solenoid Design: Features an advanced wet-armature structure that utilizes the hydraulic fluid for constant cooling of the solenoid coils. This design drastically reduces operational noise and significantly extends coil service life.

• Soft-Shift Characteristics: Optimized spool notch geometry provides precise flow control during shifting, minimizing “hydraulic shock” and suppressing vibration in the hydraulic lines during rapid directional changes.

• High-Strength Cast Architecture: Valve bodies are manufactured from high-tensile ductile iron with precision phosphate coating, offering superior corrosion resistance and structural integrity under peak pressures up to 315 bar.

• 100% Drop-in Interchangeability: Strictly adhering to ISO 4401 mounting standards, our valves offer a 1:1 seamless replacement for industry-standard valves like the Vickers DG4V series, ensuring zero downtime during maintenance and upgrades.

Application Areas:

• CNC Machine Tools: Precision control for hydraulic clamping and tool-change mechanisms.

• Injection Molding Machines: Reliable switching for mold clamping and injection pressure sequences.

• Industrial Automation: Hydraulic drive control for automated lifting platforms, pushers, and robotic arms.

• Mobile Machinery: Flow control for hydraulic outriggers and auxiliary work tools.

Expert Maintenance Tips:

• Solenoid Service Protocol: Always ensure the hydraulic system is fully depressurized before attempting to remove or replace solenoid coils to prevent pressurized fluid leaks.

• Fluid Cleanliness Standards: Given the precision internal clearances, maintain ISO 4406 18/16/13 fluid cleanliness. Regular filter replacement is critical to prevent particulate contamination from jamming the spool.

• Electrical Connection Sealing: For DIN-type connectors (IP65), ensure the fastening screws are tightened securely after installation. A light application of anti-corrosion grease on the seal gasket is recommended to prevent moisture ingress in outdoor operating environments.