EHDFG Series Proportional Directional Valve Replacement | Vickers EHDG ELDFHG Valve

Genlu Hydraulic proudly introduces the EHDFG/EHDG/ELDFHG Series high-performance electro-hydraulic proportional directional valves. Engineered for precision control in demanding industrial hydraulic circuits, these valves provide a seamless, high-performance alternative to Vickers original units. We specifically highlight our supply capability for precision-tuned units such as the EHDFG-04-130-2E-10, EHDFG-04-130-40-E-10, and EHDFG-01-30-3C2-X-30.

The EHDFG series is renowned for its low-hysteresis control, elite dynamic frequency response, and industry-leading null-point stability. Genlu guarantees 100% Drop-in Interchangeability across mounting footprints, electrical connector specifications, valve spool dynamics, and sealing configurations compared to original Vickers EHDFG/EHDG assemblies. Every valve undergoes 100% dynamic response and pressure-load verification on our specialized test benches, certifying precise, reliable performance in critical closed-loop control systems.

Technical Specifications 

• Product Series: EHDFG / EHDG / ELDFHG Proportional Directional Valve

• Representative Models: EHDFG-04-130-2E-10, EHDFG-04-130-40-E-10, EHDFG-01-30-3C2-X-30

• Nominal Pressure: 350 bar

• Nominal Flow Rate: 30 L/min to 130 L/min (Model-dependent)

• Frequency Response: Up to 80-100 Hz (Application-dependent)

• Control Signal: Standard Analog Input (Voltage/Current)

• Mounting Style: Subplate Mounting (ISO 4406 Standard)

• Spool Feedback: Integrated LVDT (Linear Variable Differential Transformer)

Key Technical Advantages:

• Low Hysteresis & High Dynamic Response: Precision-machined spools paired with high-frequency electromagnetic drivers ensure near-instantaneous flow regulation, meeting the strict requirements of injection molding and metal-forming machinery.

• High-Precision Closed-Loop Control: Integrated displacement feedback ensures spool movement is perfectly synchronized with input signals, eliminating control drift caused by thermal expansion or load pressure fluctuations.

• Elite Contamination Tolerance: Advanced spool-to-sleeve shear edge design provides superior resistance to cavitation and particulate interference, significantly extending service life in harsh industrial environments.

• True Drop-in Compatibility: Strictly compliant with Vickers geometric mounting standards, allowing for seamless integration and replacement without requiring changes to existing control software or manifold hardware.

Application Areas:

• Plastics Machinery: Proportional speed and pressure control for injection and die-casting machines.

• Steel & Metallurgy: Position control systems for rolling mills and high-precision servo cylinders.

• Industrial Automation: Heavy-duty industrial robots and complex motion-trajectory hydraulic systems.

Expert Maintenance Tips:

• Electrical Shielding: Proportional valves are highly sensitive to electromagnetic interference. Always use shielded cabling and ensure junction boxes are IP65-rated to prevent moisture ingress and signal degradation.

• Strict Fluid Cleanliness: Due to extremely tight spool-to-sleeve tolerances, maintain fluid cleanliness at ISO 4406 17/15/12. A 5μm high-precision supply-side filter is highly recommended.

• Calibration Protocol: After initial installation, perform a simple Null Shift Calibration via the control system to match the valve’s dynamic response characteristics, ensuring optimal control accuracy.