EHFBG-10-500 Proportional Flow Control Valves (
YUKEN)
Quick Overview: The
YUKEN EHFBG-10-500 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. It is a large-size, high-flow variant suitable for heavy-duty industrial hydraulic systems requiring large flow output.
1. Model Number Breakdown
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Code
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Meaning
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EHFBG
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Series: Proportional Electro-Hydraulic Flow Control and Relief Valve (Power-Saving Valve)
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10
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Valve Size (32通径，D10 standard mounting interface)
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500
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Maximum Flow Rate: 500 L/min (132 US GPM)
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C/H
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Pressure Rating Variant (C: Standard 1.4-14 MPa, H: Higher 1.4-21 MPa)
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50/61/S
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Option Code (50: Standard, 61: Special, S: Special configuration)
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2. Core Specifications
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Parameter
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Value
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Type
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Proportional electro-hydraulic flow control + relief valve (meter-in type), energy-saving design
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Max. Operating Pressure
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24.5 MPa (3,550 psi / 210 kgf/cm²) (consistent with series standard)
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Max. Flow Rate
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500 L/min (132 US GPM)
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Flow Adjustment Range
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5-500 L/min (1-100% of max flow, consistent with 10通径 high-flow design)
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Ambient Temperature
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0°C to +50°C
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Fluid Medium
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Hydraulic oil (ISO VG 32-68)
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Electrical Interface
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Proportional solenoid (typically 12V/24V DC, 750 mA rated current; compatible with 0-10V/4-20mA control signal)
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Mounting
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D10 standard hydraulic interface (板式安装, 32通径 matching)
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3. Working Principle
This valve operates as an energy-saving proportional control unit with two integrated functions, consistent with the EHFBG series design logic:
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Flow Control: Adjusts flow proportionally to the input electrical current (0-10V or 4-20mA signal), adapting to high-flow demand with stable regulation
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Pressure Relief: Maintains minimal differential pressure across the flow control orifice while following load pressure, minimizing power loss even under large flow conditions
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Temperature Compensation: Built-in compensation ensures consistent flow control regardless of fluid temperature changes, critical for high-flow system stability
The valve controls pump pressure by following load pressure, keeping differential pressure minimized, resulting in a low power-consumption, energy-efficient system, especially suitable for large-flow hydraulic circuits that require both precision and energy saving.
4. Key Features
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Dual Functionality: Combines proportional flow control and pressure relief in one compact unit, integrating two core functions to simplify system design
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Energy Saving: Supplies only the minimum pressure and flow required for actuator operation, reducing power consumption significantly in high-flow systems
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Precise Control: Linear response to input current with low hysteresis and high repeatability, ensuring stable flow regulation even at maximum 500 L/min output
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Temperature Stability: Consistent performance across operating temperature range, avoiding flow deviation caused by oil temperature changes
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High Flow & Pressure Rating: Up to 24.5 MPa (3,550 psi) pressure and 500 L/min flow, suitable for heavy-duty, high-demand industrial applications
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Multiple Variants: Available in C/H pressure ratings and various electrical/configuration options (e.g., S-type special configuration) to meet diverse application needs
5. Common Variants
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Model
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Description
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EHFBG-10-500-C-50
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Standard pressure rating (1.4-14 MPa), standard option
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EHFBG-10-500-H-50
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Higher pressure rating (1.4-21 MPa), standard option
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EHFBG-10-500-C-61
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Standard pressure rating, special option
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EHFBG-10-500-H-S-50
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Higher pressure rating, special configuration option (S-type)
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6. Applications
The EHFBG-10-500 is ideal for high-flow, heavy-duty hydraulic systems, including:
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Large-scale industrial machinery requiring high flow and precise speed control (large injection molding machines, heavy metal forming equipment)
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Automated production lines with large-scale actuators and variable speed requirements
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Hydraulic systems where energy efficiency is critical despite high flow demand (reducing pump power consumption significantly)
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Heavy-duty mobile equipment with multiple large actuators needing independent control
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High-precision large-flow motion control applications (large machine tools, industrial testing equipment)
7. Installation & Operation Notes
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Requires a proportional amplifier to convert control signals (0-10V/4-20mA) to solenoid current, ensuring stable high-flow regulation
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Must be mounted on a clean, flat surface with proper torque specifications; ensure the D10 mounting interface is properly aligned for high-flow stability
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Hydraulic fluid must be filtered to ISO 18/15 cleanliness standard to prevent clogging and damage to the valve core under high-flow conditions
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Electrical connections must be properly shielded to prevent electromagnetic interference, which may affect proportional control accuracy
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Calibration may be required for optimal performance in specific high-flow applications; initial exhaust of pressure and flow coils is recommended before use
8. Related Series
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EHFBG Standard Flow Series: EHFBG-06-250 (250 L/min) and EHFBG-03-125 (125 L/min) for smaller flow requirements
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EFBG Series: Corresponding standard series (EFBG-10-500) with similar functions, compatible with EHFBG-10-500 in high-flow systems
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EHFBG-10-300: Medium-flow variant (300 L/min) of the 10-size series, suitable for medium-to-high flow applications
Would you like a concise side-by-side comparison of EHFBG-10-500 vs EHFBG-06-250 and EFBG-10-500, highlighting key differences in flow, size, and application scenarios?
