Yuken EHDFG-04 Proportional Valve | EHDFG-04-130-2-E-10 | EHDFG-04-130-40

EHDFG Series High Response Proportional Directional Valves

Product Overview:

The EHDFG Series represents the pinnacle of proportional valves designed for hydraulic systems requiring ultra-fast response and extreme precision. This series, particularly the EHDFG-04 size, integrates a high-performance On-Board Electronics (OBE) amplifier, allowing for continuous and proportional control of both hydraulic flow and direction via analog commands. Featuring an internal LVDT (Linear Variable Differential Transformer) for closed-loop spool position feedback, the EHDFG series ensures minimal hysteresis and exceptional linearity even during high-speed cycling. It is the critical driving component for high-speed injection molding machines, die-casting equipment, and sophisticated closed-loop industrial automation.

Featured models include the standard feedback version EHDFG-04-130-2-E-10 and the optimized EHDFG-04-130-40-E-10.

Key Technical Advantages:

• Integrated OBE Design: The built-in amplifier eliminates wiring interference, boosts Electromagnetic Compatibility (EMC), and arrives pre-calibrated for immediate deployment.

• Ultra-Fast Dynamic Response: Optimized coil architecture and driving circuitry allow for millisecond-level spool displacement, perfect for high-frequency pulse operations.

• Closed-Loop Precision: Real-time spool position monitoring via LVDT maintains hysteresis below 1%, guaranteeing superior repeatability for actuators.

• High Flow Capacity: The 04 nominal size supports a rated flow of up to 130 L/min, perfectly balancing power with micro-metering precision.

Detailed Specifications & Parameters:

• Core Series: EHDFG High Response Proportional Series.

• Featured Model Matrix:

  • EHDFG-04-130-2-E-10 (Size NG15, 130 L/min, Low hysteresis feedback type)

  • EHDFG-04-130-40-E-10 (Size NG15, 130 L/min, Type 40 command logic)

• Core Technical Specs:

  • Nominal Size: 04 (Compliant with ISO 4401-07 mounting standards).

  • Max Operating Pressure: Rated up to 24.5 MPa (250 Bar).

  • Rated Flow Rate: 130 L/min (at $\Delta p = 1.5$ MPa).

  • Input Signal: $\pm 10$ V DC or 4-20 mA (depending on model suffix).

  • Protection Level: Industrial-grade sealing for the integrated electronic housing.