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

更新时间：2026-05-09 10:19:21

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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

Input Signal: 0–5V DC signal from a proportional amplifier controls the valve
Proportional Operation: Spool position changes proportionally to input current, adjusting flow area
Compensation: Internal pressure and temperature compensation mechanisms maintain constant flow despite load pressure changes or fluid viscosity variations
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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