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EHFBG-06-250 Proportional Flow Control Valves

更新时间：2026-05-05 11:23:23

EHFBG-06-250 Proportional Flow Control Valves (YUKEN)

Quick Overview: The YUKEN EHFBG-06-250 is a proportional electro-hydraulic flow control and relief valve (often called a "power-saving valve") that combines precise flow regulation with pressure relief, designed to supply the minimum pressure and flow required for actuator operation while minimizing energy consumption.

1. Model Number Breakdown

Code	Meaning
EHFBG	Series: Proportional Electro-Hydraulic Flow Control and Relief Valve (Power-Saving Valve)
06	Valve Size (D06/D08 mounting interface)
250	Maximum Flow Rate: 250 L/min (66 US GPM)
C/H	Pressure Rating Variant (C: Standard, H: Higher)
50/61	Option Code (50: Standard, 61: Special)

2. Core Specifications

Parameter	Value
Type	Proportional electro-hydraulic flow control + relief valve (meter-in type)
Max. Operating Pressure	24.5 MPa (3,550 psi / 210 kgf/cm²)
Max. Flow Rate	250 L/min (66 US GPM)
Flow Adjustment Range	1-125 L/min (50% of max flow)
Ambient Temperature	0°C to +50°C
Fluid Medium	Hydraulic oil (ISO VG 32-68)
Electrical Interface	Proportional solenoid (typically 12V/24V DC, 750 mA rated current)
Mounting	D06/D08 standard hydraulic interface (板式安装)

3. Working Principle

This valve operates as an energy-saving proportional control unit with two integrated functions:

Flow Control: Adjusts flow proportionally to the input electrical current (0-10V or 4-20mA signal)
Pressure Relief: Maintains minimal differential pressure across the flow control orifice while following load pressure, minimizing power loss
Temperature Compensation: Built-in compensation ensures consistent flow control regardless of fluid temperature changes

The valve controls pump pressure by following load pressure, keeping differential pressure minimized, resulting in a low power-consumption, energy-efficient system.

4. Key Features

Dual Functionality: Combines proportional flow control and pressure relief in one compact unit
Energy Saving: Supplies only the minimum pressure and flow required for actuator operation
Precise Control: Linear response to input current with low hysteresis and high repeatability
Temperature Stability: Consistent performance across operating temperature range
High Pressure Rating: Up to 24.5 MPa (3,550 psi) for demanding industrial applications
Multiple Variants: Available in C/H pressure ratings and various electrical configurations

5. Common Variants

Model	Description
EHFBG-06-250-C-50	Standard pressure rating, standard option
EHFBG-06-250-H-50	Higher pressure rating, standard option
EHFBG-06-250-C-61	Standard pressure rating, special option
EHFBG-06-500	High-flow version (500 L/min, 132 US GPM)

6. Applications

The EHFBG-06-250 is ideal for:

Industrial machinery requiring precise speed control (injection molding, metal forming)
Automated production lines with variable actuator speeds
Hydraulic systems where energy efficiency is critical
Mobile equipment with multiple actuators needing independent control
Precision motion control applications (machine tools, testing equipment)

7. Installation & Operation Notes

Requires a proportional amplifier to convert control signals (0-10V/4-20mA) to solenoid current
Must be mounted on a clean, flat surface with proper torque specifications
Hydraulic fluid must be filtered to ISO 18/15 cleanliness standard
Electrical connections must be properly shielded to prevent electromagnetic interference
Calibration may be required for optimal performance in specific applications

8. Related Series

EHFBG High Flow Series: EHFBG-06-500 (500 L/min) for higher flow requirements
EFBG Series: Standard flow version (125 L/min for 06 size)
EHFBG-03-250: Smaller size (03) with 250 L/min flow rate

Would you like a concise side-by-side comparison of EHFBG-06-250 vs EFBG-06-250 and EHFBG-06-500, highlighting key differences in flow, pressure, and energy efficiency?

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