Yuken EDG-01V EFBG-03 Proportional Valve | Injection Molding Machine Hydraulic Control

The EDG-01V and EFBG-03 series proportional valves from Chengyuan Hydraulic are high-precision control components fully compatible with Yuken industrial standards. The EDG-01V serves as a pilot-operated proportional pressure relief valve, while the EFBG-03 is a multi-function valve designed to control both system pressure and flow simultaneously. For specific models like EDG-01V-H-PNT13-60T and EFBG-03-250-H-5114, we utilize powerful proportional solenoids and contamination-resistant spool designs. Every valve undergoes 100% static and dynamic linearity testing to ensure exceptional repeatability in high-frequency injection molding cycles, guaranteeing 100% original-place interchangeability.

Technical Specifications :

• Series Model: EDG-01V (Pilot type) / EFBG-03 (Composite type)

• Design Number: 60 Series (EDG) / 51 Series (EFBG)

• Max Operating Pressure: 250 bar (25 MPa)

• Max Flow Rate (EFBG-03): 125 L/min or 250 L/min

• Pilot Flow (EDG-01V): 0.3 – 2.0 L/min

• Rated Current: 800 mA – 950 mA (DC)

• Coil Resistance: 10 Ω (@ 20°C)

• Hysteresis: < 1% (with high-quality power amplifier)

• Repeatability: < 1%

Key Technical Advantages:

• Superior Linearity & Low Hysteresis: The solenoid armature is treated with a precision low-friction coating. Combined with a premium amplifier, hysteresis is kept below 1%, ensuring extremely smooth pressure transitions during mold opening and injection phases.

• Differential Pressure Compensation (EFBG Series): The EFBG-03 integrates an internal compensator, making flow output independent of load pressure fluctuations. This guarantees consistent injection speeds and significantly reduces defective product rates.

• Rapid Dynamic Response: Optimized spool mass-to-spring ratios result in millisecond-level response times from zero to rated flow. This is critical for high-cycle automated injection molding machines.

• Contamination-Resistant Pilot Stage: The pilot filter in the EDG-01V is reinforced to catch micro-impurities, preventing pressure runaway caused by clogging and enhancing operational stability in harsh environments.

Application Areas:

• Precision Injection Molding Machines: Controlling multi-stage injection and holding pressures.

• Die-Casting Systems: Managing complex injection control logic.

• Rubber Processing Machinery: Precision pressure regulation for vulcanizing or extrusion.

Expert Maintenance Tips:

• Amplifier Synchronization: We recommend using Chengyuan digital amplifiers. The built-in “Dither” signal minimizes static friction, significantly enhancing valve sensitivity.

• Air Bleeding: After installation, run the system at low pressure and loosen the air bleed screw at the end of the solenoid to exhaust trapped air; otherwise, pressure hunting or vibration may occur.

• Temperature Monitoring: Proportional valves are sensitive to oil viscosity. Maintain system oil temperature between 35°C and 55°C for optimal control linearity.