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Yuken EHF(C)G-03/06: Proportional Flow Control and Check Valves

更新時(shí)間：2026-08-15 10:25:13??

油研YUKEN閥門(mén)
Quick Overview: The EHF(C)G-03/06 series from Yuken are electro-hydraulic proportional flow control (and check) valves with built-in pressure and temperature compensation, enabling remote, precise flow control independent of load pressure or fluid viscosity changes.

Key Features

  • Proportional Remote Control: Flow rate varies proportionally with input current/voltage, allowing remote adjustment via amplifier signal
  • Pressure & Temperature Compensation: Preselected flow remains stable regardless of load pressure changes or fluid viscosity variations (temperature effects)
  • Check Valve Option: EHFCG models include an integral check valve for free reverse flow (EHFG: flow control only)
  • Smooth Operation: Enables shock-free actuator startup, stopping, and speed changes
  • CETOP Mounting: Standard CETOP D05 (03 size) and D08 (06 size) mounting interfaces

Technical Specifications

Parameter
EHFG-03 / EHFCG-03
EHFG-06 / EHFCG-06
Unit
Max. Operating Pressure
24.5
24.5
MPa (3,550 psi)
Max. Flow Rate
125
250
L/min (33/66 US gal/min)
Min. Flow Rate
1
2.5
L/min
Supply Voltage
24V DC (21–28V DC, includes ripple)
24V DC (21–28V DC, includes ripple)
V
Max. Power Input
28
28
W
Input Signal
0–5V DC (max. metered flow at 5V)
0–5V DC (max. metered flow at 5V)
V
Input Impedance
10
10
kΩ
Ambient Temperature
0–50°C (with circulated air)
0–50°C (with circulated air)
°C
Mounting Standard
CETOP D05
CETOP D08
—

Model Number Breakdown

Example: F-EHFCG-03-60-E-50
Code
Meaning
F-
Special Seals Option
EHF
Series Number (Electro-Hydraulic Flow control)
C
Check Valve (EHFCG = with check; EHFG = without check)
G
Type of Valve (Flow control with compensation)
03/06
Valve Size (CETOP D05/D08)
60
Max. Metered Flow (L/min)
E
Mounting Type (Standard: E=CETOP)
50
Design Number

Working Principle

  1. Input Signal: 0–5V DC signal from a proportional amplifier controls the valve
  2. Proportional Operation: Spool position changes proportionally to input current, adjusting flow area
  3. Compensation: Internal pressure and temperature compensation mechanisms maintain constant flow despite load pressure changes or fluid viscosity variations
  4. Check Function (EHFCG only): Allows free reverse flow while maintaining controlled forward flow

Applications

Ideal for systems requiring precise, remote flow/speed control with stability against varying conditions:
  • Plastic Machinery: Injection molding machines (screw speed, mold movement)
  • Machine Tools: CNC machines (axis movement control)
  • Material Handling: Conveyor speed control, lift systems
  • Presses: Speed control of ram movement
  • Any application needing smooth, shock-free actuator operation with accurate speed regulation

Installation & Usage Notes

  • Requires a proportional amplifier (not included) for operation
  • Mount on CETOP D05/D08 standard interface
  • Use clean hydraulic fluid (ISO 4406 class 18/15 or better)
  • Maintain recommended ambient temperature range (0–50°C)
  • Follow proper electrical connections (24V DC power, 0–5V control signal)

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