EF(C)G-02/03/06/10 is a proportional electro-hydraulic flow control (with check) valve of the 10Ω series produced by
Yuken (Japan), divided into two types: EFG (flow control only) and EFCG (flow control + check valve), which is widely used in hydraulic systems requiring precise flow control.
I. Product Overview
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Core Function: The spool position is controlled by a proportional solenoid to achieve continuous and proportional regulation of flow; a built-in pressure-temperature compensation mechanism ensures that the flow is not affected by changes in load pressure and oil temperature.
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Check Function: The EFCG type integrates a check valve, allowing free reverse flow, which is suitable for circuits requiring bidirectional flow control.
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Control Method: It must be used with a dedicated power amplifier, and remote flow control is realized by adjusting the output current of the amplifier.
II. Model Meaning Explanation
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Model Part
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Meaning
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E
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Electro-hydraulic proportional control
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F
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Flow control function
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(C)
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Optional, with check valve (EFCG)
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G
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Pressure-temperature compensated type
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02/03/06/10
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Valve specification size (corresponding to different flow levels)
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10Ω
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Series code (input impedance 10 kΩ)
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III. Main Features
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Proportional Control: The preset flow is proportional to the input current, enabling stepless speed regulation and remote precise control.
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Dual Compensation Mechanism: Built-in pressure compensation (not affected by load changes) and temperature compensation (not affected by oil temperature/viscosity changes) to ensure flow stability.
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Two Types Optional:
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EFG: Flow control only, suitable for one-way flow control circuits.
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EFCG: Flow control + check valve, suitable for circuits requiring free reverse flow.
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Flexible Installation: Complies with CETOP D05/D08 installation standards, facilitating integration into hydraulic systems.
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Fast Response: Driven by a proportional solenoid, with short response time and high control precision.
IV. Key Specification Parameters
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Model
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Maximum Flow (L/min)
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Minimum Flow (L/min)
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Maximum Working Pressure (MPa)
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Installation Standard
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EF(C)G-02
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30(60)
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0.5
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24.5(3,550psi)
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CETOP D05
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EF(C)G-03
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60(125)
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1
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24.5(3,550psi)
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CETOP D05
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EF(C)G-06
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250
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2.5
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24.5(3,550psi)
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CETOP D08
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EF(C)G-10
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280
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3
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24.5(3,550psi)
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CETOP D08
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Note: Data in parentheses are for high-flow versions.
Other Important Parameters:
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Input Signal: 0-10V DC or 4-20mA
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Input Impedance: 10kΩ (source of the 10Ω series name)
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Working Medium: Mineral oil, synthetic hydraulic oil (prefix "F-" is required for special seals)
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Working Temperature: -20℃~+70℃
V. Application Fields
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Injection Molding Machines: Control the speed of mold clamping, injection, ejection and other actions.
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Die Casting Machines: Precisely control the mold opening/closing speed and molten metal injection speed.
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Construction Machinery: Control the speed of actuators such as excavators and cranes.
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Machine Tools: Spindle speed control and worktable feed speed adjustment.
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Automated Production Lines: Synchronous control and speed adjustment of hydraulic actuators.
VI. Usage Notes
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It must be used with a Yuken dedicated power amplifier to ensure control precision and stability.
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The hydraulic system must be thoroughly cleaned before installation to avoid damage to the spool by impurities.
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Regularly check the oil cleanliness; it is recommended to use a filter with an accuracy of 10μm or less.
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Electrical connections must be shielded to prevent electromagnetic interference from affecting the control signal.
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If it is to be used with phosphate ester or water-glycol medium, a special seal version must be selected.
VII. Selection Suggestions
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Select the appropriate specification (02/03/06/10) according to the maximum flow of the system.
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Select the type (EFG/EFCG) according to the circuit requirements.
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Ensure that the working pressure does not exceed 24.5MPa.
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Select a matching power amplifier and control signal type.
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Consider the installation space and interface size (CETOP D05/D08).
Do you need me to determine the specific model and provide a recommended configuration based on your system parameters (maximum flow, working pressure, control signal type, whether a check function is needed)?
