EBG-03-C-R-20 EBG-03-H-R-20 EBG-06-C-R-20 Yuken Proportional Relief Valve 245 bar
| Model Number | EBG-03-C-R-20, EBG-03-H-R-20, EBG-06-C/H-R-20 |
|---|
Product Description
Product Overview
The EBG series proportional electro-hydraulic relief valves are pilot-operated proportional pressure control valves engineered by Yuken for industrial hydraulic systems. These valves combine a compact, high-performance 1/8 proportional electro-hydraulic pilot relief valve with a specially developed low-noise main relief valve, enabling system pressure to be controlled in direct proportion to the input current. The EBG series is widely used in injection molding machines, metal presses, and other industrial machinery requiring automated pressure cycling.
The EBG series covers EBG-03 (NG10) and EBG-06 (NG20) sizes, conforming to ISO standard mounting interfaces, with two pressure adjustment ranges: C-range (1.2–15.7 MPa) and H-range (1.5–24.5 MPa). Valve bodies are manufactured from high-strength cast iron with optimized internal flow paths, offering low noise, fast response, and low hysteresis.
Our complete range of Yuken EBG proportional valves strictly adheres to OEM technical standards, achieving 100% direct interchangeability with original components. Every unit undergoes 100% simulated operating condition bench testing prior to shipment, ensuring performance parameters are fully consistent with genuine Yuken products. Direct replacement significantly reduces equipment downtime and maintenance costs.
⚠️ Model Code Decoding (using EBG-03-C-R-20 as example) :
EB = Proportional Electro-Hydraulic Relief Valve
G = Subplate Mounting
03 = Valve size (03=NG10; 06=NG20)
C / H = Pressure adjustment range (C: 1.2–15.7 MPa; H: 1.5–24.5 MPa)
R = Safety valve configuration (R=with safety valve; T=without safety valve)
20 = Design series number
Technical Specifications
EBG Series General Specifications (Pilot-Operated Proportional Relief Valve)
Product Series: Yuken EBG series proportional electro-hydraulic relief valve
Product Type: Proportional electro-hydraulic relief valve
Brand: Yuken
Actuator Type: 1/8 proportional electro-hydraulic pilot relief valve + low-noise main valve combination
Maximum Operating Pressure: 24.5 MPa (245 bar / 3550 PSI)
Minimum Flow: 3 L/min (all sizes)
Coil Resistance: 10 Ω
Hysteresis: < 3% (with Yuken amplifier)
Repeatability: < 1%
Step Response Time: 30 – 50 ms
Mounting Type: Subplate mounting
Compatible Fluids: Mineral-based hydraulic oil ISO VG32–VG68
Recommended Cleanliness: NAS Class 7
Oil Temperature Range: -10°C to +70°C
Solenoid Voltage: DC24V
Input Signal: 0–5V / 0–10V
Compatible Amplifiers: AME-D, AMN-D series
EBG-03-C-R-20 (NG10, C Pressure Range)
Product Series: Yuken EBG series proportional electro-hydraulic relief valve
Model Code: EBG-03-C-R-20
Valve Size: 03 (NG10 / CETOP 5)
Maximum Operating Pressure: 24.5 MPa (245 bar)
Maximum Flow: 100 L/min
Minimum Flow: 3 L/min
Pressure Adjustment Range (C-range) : 1.2 – 15.7 MPa (12 – 157 bar)
Rated Current (C-range) : 770 mA
Coil Resistance: 10 Ω
Safety Valve: With (R-type)
Mass: 5.6 kg
Mounting Bolts: M12 × 70Lg (2 pcs) + M12 × 95Lg (2 pcs)
Subplate: BGM-03-20 / BGM-03X-20
EBG-03-H-R-20 (NG10, H Pressure Range)
Product Series: Yuken EBG series proportional electro-hydraulic relief valve
Model Code: EBG-03-H-R-20
Valve Size: 03 (NG10 / CETOP 5)
Maximum Operating Pressure: 24.5 MPa (245 bar)
Maximum Flow: 100 L/min
Minimum Flow: 3 L/min
Pressure Adjustment Range (H-range) : 1.5 – 24.5 MPa (15 – 245 bar)
Rated Current (H-range) : 820 mA
Coil Resistance: 10 Ω
Safety Valve: With (R-type)
Mass: 5.6 kg
Mounting Bolts: M12 × 70Lg (2 pcs) + M12 × 95Lg (2 pcs)
Subplate: BGM-03-20 / BGM-03X-20
EBG-06-C-R-20 / EBG-06-H-R-20 (NG20, C/H Pressure Range)
Product Series: Yuken EBG series proportional electro-hydraulic relief valve
Model Code: EBG-06-C-R-20 / EBG-06-H-R-20
Valve Size: 06 (NG20)
Maximum Operating Pressure: 24.5 MPa (245 bar)
Maximum Flow: 200 L/min
Minimum Flow: 3 L/min
Pressure Adjustment Range (C-range) : 1.2 – 15.7 MPa
Pressure Adjustment Range (H-range) : 1.5 – 24.5 MPa
Rated Current (C-range) : 750 mA
Rated Current (H-range) : 800 mA
Coil Resistance: 10 Ω
Safety Valve: With (R-type)
Mass: 6.3 kg
Subplate: BGM-06-20 / BGM-06X-20
Key Technical Advantages
1. Pilot-Operated Two-Stage Design for Precise Pressure Control at High Flow
The EBG series features a pilot-operated two-stage design—a small-flow 1/8 proportional electro-hydraulic pilot relief valve as the first stage, and a specially developed low-noise main relief valve as the second stage. System pressure is precisely set via the pilot valve, with the main valve accurately relieving under high-flow conditions. Compared to direct-acting proportional valves, the pilot-operated design delivers superior regulation accuracy and stability under high-flow (100–200 L/min) conditions.
2. Low-Noise Design for Improved Factory Environment
The EBG series main valve features specially developed low-noise design, effectively reducing spool chatter and fluid noise. The unique vent restrictor structure enables more precise and stable pressure control, significantly improving the factory working environment.
3. Low Hysteresis and High Repeatability for Consistent Pressure Control
The EBG series delivers hysteresis < 3% and repeatability < 1% (when used with Yuken amplifiers). These performance metrics ensure precise, repeatable pressure control across the entire command signal range, making the EBG particularly suitable for automated pressure cycling applications in injection molding machines and presses.
4. Wide Pressure Adjustment Range with Flexible Configuration
The EBG series offers C-range (1.2–15.7 MPa) and H-range (1.5–24.5 MPa) pressure adjustment options. Safety valve configurations include R-type (with safety valve) and T-type (without safety valve). EBG-03 and EBG-06 sizes cover 100–200 L/min flow ranges, accommodating applications from injection molding machines to large presses.
5. Standard Subplate Mounting with 100% Interchangeability
The EBG series conforms to ISO standard mounting interfaces. Valves of the same size across different brands are physically and interface-wise identical, enabling 100% direct interchangeability without manifold modification or system adjustment. Compatible BGM series subplates (BGM-03/BGM-06) provide convenient installation solutions.
6. Wide Temperature Range and High Reliability
The EBG series supports an oil temperature range of -10°C to +70°C with recommended cleanliness of NAS Class 7. The design ensures long service life for 24/7 continuous industrial operation. The built-in safety valve (R-type) provides system overpressure protection in the event of electrical signal failure.
7. 100% Simulated Operating Condition Testing
Every unit undergoes 100% simulated operating condition bench testing prior to shipment, ensuring consistent, stable performance at rated pressure and flow.
Application Areas
Injection Molding Machinery: Stepless pressure regulation and automated pressure cycling control for injection molding and blow molding machines
Metal Presses: Proportional pressure control for hot and cold presses
Industrial Hydraulic Power Units: Stepless pressure regulation for hydraulic power units and stations
Construction Machinery: Proportional pressure regulation for excavators and wheel loaders
Metallurgical Equipment: Pressure control for rolling mills and continuous casting equipment
Wind Power: Proportional pressure control for wind turbine hydraulic systems
Test Equipment: Precision pressure control and simulation for hydraulic test benches
Expert Maintenance Tips
1. Must Use a Dedicated Proportional Amplifier
The EBG series proportional solenoid requires specific PWM current drive—PLC direct voltage output cannot drive the solenoid. A Yuken dedicated proportional amplifier (such as AME-D-10-*-20 or AMN-D-10 series) is required. Input signal standard is 0–5V or 0–10V.
2. Verify Model and System Compatibility Prior to Installation
The EBG series offers 03 (NG10) and 06 (NG20) sizes with C/H pressure ranges. Confirm prior to installation:
Valve size meets system flow requirements (03=100 L/min, 06=200 L/min)
Pressure adjustment range (C-range 1.2–15.7 MPa / H-range 1.5–24.5 MPa) covers system operating pressure
Safety valve configuration (R-type with safety valve / T-type without safety valve) meets system safety requirements
3. Mounting Surface and Bolt Torque
The EBG series conforms to ISO standard mounting interfaces. Use a torque wrench to tighten mounting bolts diagonally to the torque values specified in Yuken technical manuals—EBG-03 uses M12 × 70Lg (2 pcs) + M12 × 95Lg (2 pcs).
4. System Cleanliness Management
The EBG series features precision pilot-operated construction and demands adequate oil cleanliness. Recommended system cleanliness: NAS Class 7 or higher. Install high-precision filters in the system return line and inspect filter elements regularly.
5. Electrical Wiring and Signal Commissioning
EBG series solenoid requires DC24V power supply, coil resistance 10 Ω
During commissioning, start from low command signals and gradually increase, monitoring system pressure response for smooth operation
Input signal vs. output pressure exhibits a linear proportional relationship
Step response time: 30–50 ms
6. Periodic Functional Checks
Perform functional checks every 2,000 operating hours or annually: verify linearity between command signal and output pressure, response time testing, leakage inspection, and hysteresis/repeatability verification. If reduced control accuracy, sluggish response, or abnormal leakage is observed, arrange for servicing or replacement.
EBG-03-C-R-20 is a pilot-operated electro-hydraulic proportional relief valve, often used for high-precision pressure regulation in hydraulic systems. It is suitable for various medium and low-pressure hydraulic operating conditions. The following is a detailed explanation from multiple dimensions and lists the complete models of this series:
Model Analysis
EBG: Series code, representing pilot-operated electro-hydraulic proportional relief valve, which belongs to the category of hydraulic pressure control valves
03: Diameter specification code, corresponding to the valve’s diameter specification of the 03 series, determines the valve’s basic flow capacity and is suitable for medium and small flow hydraulic systems
C: Control mode or valve core type code, representing the conventional control type valve core, suitable for pressure regulation requirements under standard working conditions, and distinguished from other codes such as H for scenarios with different pressure response characteristics
R: Installation or interface form code, referring to a specific plate-type installation adaptation structure that can be attached to the corresponding standard installation base plate to ensure sealing and stability after installation
20: Pressure parametry-related code, representing the valve’s suitable pressure regulation range or rated pressure-related parameters. The maximum suitable pressure is approximately 20 mpa for hydraulic systems (fine-tuned according to actual working conditions).
Core attribute
The type is pilot-operated electro-hydraulic proportional relief valve. The main body material is mostly cast iron, which has good pressure resistance and resistance to hydraulic oil corrosion, and is suitable for mainstream hydraulic media such as petroleum-based hydraulic oil.
The nominal pressure can generally reach 31.5MPa, and the working temperature range is usually -20 to 60℃, making it suitable for hydraulic systems in normal temperature and general industrial environments.
The installation form is mainly plate installation, which meets the adaptation requirements of the standardized installation base plate in the hydraulic system and is convenient for integration and replacement.
The drive mode is electromagnetic drive and it needs to be used in conjunction with a power amplifier to achieve precise conversion between electrical signals and hydraulic pressure.
Function and Role
Core function: Receive electrical signals and convert them into corresponding hydraulic control pressures. Adjust the opening degree of the main valve through the pilot mechanism to precisely control the maximum working pressure of the hydraulic system. It also has a pressure overflow function. When the system pressure exceeds the set value, it will automatically start the overflow to drain the excess oil back to the oil tank.
The main functions are as follows: Firstly, it provides stable pressure control for the hydraulic system, ensuring the smooth operation of the actuating elements and preventing abnormal equipment operation caused by pressure fluctuations. Second, it serves to provide overload protection, preventing the system pressure from being too high and damaging core components such as the pump body and pipelines. Thirdly, it can achieve stepless pressure regulation by adjusting the input electrical signal, adapting to the pressure requirements under different working conditions of the system.
Working principle
This valve adopts a pilot control structure and is divided into two parts: the pilot valve and the main valve. When in operation, an external electrical signal is input to the electromagnetic control terminal of the valve. The electromagnetic force drives the valve core of the pilot valve to act, thereby changing the pressure of the pilot oil circuit. The pressure change in the pilot oil circuit will drive the main valve core to move, adjusting the size of the overflow opening of the main valve. The system pressure is compared with the pressure corresponding to the set electrical signal through the feedback mechanism to form a closed-loop control. When the system pressure reaches the set value, the main valve remains stably open to achieve overflow pressure stabilization. If the system pressure is lower than the set value, the opening of the main valve will be reduced to decrease the overflow until the system pressure returns to the set range, thereby achieving precise and stable pressure control.
Installation Precautions
Before installation, the pipeline must be thoroughly flushed to remove iron filings, sealing residues and other impurities. At the same time, the cleanliness of the hydraulic oil should be checked to reach NAS level 7 or above. It is recommended to install a filter with a mesh size of ≥60 before the valve to prevent impurities from getting stuck in the valve core and affecting the regulation accuracy.
When installing the plate type, it is necessary to ensure that the surface finish of the installation is ≤4μm and the straightness is ≤0.01mm/mm. The bolts should be tightened with a rated torque wrench, and the force should be evenly distributed to avoid deformation of the installation surface and leakage.
When making electrical connections, a suitable power amplifier should be matched. The lead length should be controlled within 5 meters as much as possible. Check the voltage parameters and distinguish the positive and negative poles. The signal lines should be kept away from strong current circuits to prevent electromagnetic interference from causing signal distortion.
When connecting pipelines, avoid using sealing materials that are prone to fall off, such as sealing tapes. Instead, give priority to using suitable sealing gaskets. Keep the pipelines as short as possible and minimize the use of hoses to ensure system rigidity and reduce pressure response delay.
The installation position should preferably be close to the actuator or the pump outlet. It can be installed in any direction, but it is necessary to avoid the valve core axis being parallel to the acceleration direction of the equipment to prevent vibration from affecting the valve core’s operation.
Application scenarios and models used
Application scenarios: Widely used in hydraulic systems that require precise pressure regulation, such as injection molding, metal die-casting, machine tool processing, and hydraulic transmission equipment, etc. It is suitable for working environments with high requirements for pressure stability and the need to switch between multiple pressure conditions.
The types of machines used: Commonly found in injection molding machines, die-casting machines, CNC milling machines, hydraulic punch presses, small hydraulic testing machines, hydraulic baling machines and other equipment. It is also compatible with the auxiliary hydraulic circuits in some small construction machinery, such as the hydraulic control circuits of small loaders.
A complete list of EBG series models
This series of models forms multiple sub-models based on diameter, control mode, installation form, etc. The common complete models are as follows:
EBG – 03 – C – R – 20
EBG – 03 – H – 10
EBG – 03 – B – 50
EBG – 03 – C – T
EBG – 03 – H – T
EBG – 06 – C – 60T
EBG – 06 – H – 51
EBG – 06 – B – L
EBG – 10 – C – S – 30
EBG – 10 – H
EBG – 06 – C – R – 30
EBG – 10 – C – T
EBG – 06 – H – 61Y
EBG – 03 – A – 20
EBG – 10 – H – T
EBG-03 series
Ebg-03-c, EBG-03-H, EBG-03-C-T, EBG-03-H-T, EBG-03-C-R, EBG-03-H-R, EBG-03-C-L, EBG-03 -H-L, EBG-03-A45-R, EBG-03-B-50, EBG-03-H-10, EBG-03-C-R-20
EBG-06 series
EBG-06-C, EBG-06-H, EBG-06-C-T, EBG-06-H-T, EBG-06-C-L, EBG-06-H-R, EBG-06-B, EBG-06-BH -L, EBG-06-H-51, EBG-06-H-60T, EBG-06-H-61Y, EBG-06-C-T-51, EBG-06-C-R-30
EBG-10 series
EBG-10-C, EBG-10-H, EBG-10-C-T, EBG-10-H-T, EBG-10-H-R, EBG-10-C-S-30
Model Analysis
EBG: Series code, representing pilot-operated electro-hydraulic proportional relief valve, which belongs to the category of hydraulic pressure control valves
03: Diameter specification code, corresponding to the valve’s diameter specification of the 03 series, determines the valve’s basic flow capacity and is suitable for medium and small flow hydraulic systems
C: Control mode or valve core type code, representing the conventional control type valve core, suitable for pressure regulation requirements under standard working conditions, and distinguished from other codes such as H for scenarios with different pressure response characteristics
R: Installation or interface form code, referring to a specific plate-type installation adaptation structure that can be attached to the corresponding standard installation base plate to ensure sealing and stability after installation
20: Pressure parametry-related code, representing the valve’s suitable pressure regulation range or rated pressure-related parameters. The maximum suitable pressure is approximately 20 mpa for hydraulic systems (fine-tuned according to actual working conditions).
Core attribute
The type is pilot-operated electro-hydraulic proportional relief valve. The main body material is mostly cast iron, which has good pressure resistance and resistance to hydraulic oil corrosion, and is suitable for mainstream hydraulic media such as petroleum-based hydraulic oil.
The nominal pressure can generally reach 31.5MPa, and the working temperature range is usually -20 to 60℃, making it suitable for hydraulic systems in normal temperature and general industrial environments.
The installation form is mainly plate installation, which meets the adaptation requirements of the standardized installation base plate in the hydraulic system and is convenient for integration and replacement.
The drive mode is electromagnetic drive and it needs to be used in conjunction with a power amplifier to achieve precise conversion between electrical signals and hydraulic pressure.
Function and Role
Core function: Receive electrical signals and convert them into corresponding hydraulic control pressures. Adjust the opening degree of the main valve through the pilot mechanism to precisely control the maximum working pressure of the hydraulic system. It also has a pressure overflow function. When the system pressure exceeds the set value, it will automatically start the overflow to drain the excess oil back to the oil tank.
The main functions are as follows: Firstly, it provides stable pressure control for the hydraulic system, ensuring the smooth operation of the actuating elements and preventing abnormal equipment operation caused by pressure fluctuations. Second, it serves to provide overload protection, preventing the system pressure from being too high and damaging core components such as the pump body and pipelines. Thirdly, it can achieve stepless pressure regulation by adjusting the input electrical signal, adapting to the pressure requirements under different working conditions of the system.
Working principle
This valve adopts a pilot control structure and is divided into two parts: the pilot valve and the main valve. When in operation, an external electrical signal is input to the electromagnetic control terminal of the valve. The electromagnetic force drives the valve core of the pilot valve to act, thereby changing the pressure of the pilot oil circuit. The pressure change in the pilot oil circuit will drive the main valve core to move, adjusting the size of the overflow opening of the main valve. The system pressure is compared with the pressure corresponding to the set electrical signal through the feedback mechanism to form a closed-loop control. When the system pressure reaches the set value, the main valve remains stably open to achieve overflow pressure stabilization. If the system pressure is lower than the set value, the opening of the main valve will be reduced to decrease the overflow until the system pressure returns to the set range, thereby achieving precise and stable pressure control.
Installation Precautions
Before installation, the pipeline must be thoroughly flushed to remove iron filings, sealing residues and other impurities. At the same time, the cleanliness of the hydraulic oil should be checked to reach NAS level 7 or above. It is recommended to install a filter with a mesh size of ≥60 before the valve to prevent impurities from getting stuck in the valve core and affecting the regulation accuracy.
When installing the plate type, it is necessary to ensure that the surface finish of the installation is ≤4μm and the straightness is ≤0.01mm/mm. The bolts should be tightened with a rated torque wrench, and the force should be evenly distributed to avoid deformation of the installation surface and leakage.
When making electrical connections, a suitable power amplifier should be matched. The lead length should be controlled within 5 meters as much as possible. Check the voltage parameters and distinguish the positive and negative poles. The signal lines should be kept away from strong current circuits to prevent electromagnetic interference from causing signal distortion.
When connecting pipelines, avoid using sealing materials that are prone to fall off, such as sealing tapes. Instead, give priority to using suitable sealing gaskets. Keep the pipelines as short as possible and minimize the use of hoses to ensure system rigidity and reduce pressure response delay.
The installation position should preferably be close to the actuator or the pump outlet. It can be installed in any direction, but it is necessary to avoid the valve core axis being parallel to the acceleration direction of the equipment to prevent vibration from affecting the valve core’s operation.
Application scenarios and models used
Application scenarios: Widely used in hydraulic systems that require precise pressure regulation, such as injection molding, metal die-casting, machine tool processing, and hydraulic transmission equipment, etc. It is suitable for working environments with high requirements for pressure stability and the need to switch between multiple pressure conditions.
The types of machines used: Commonly found in injection molding machines, die-casting machines, CNC milling machines, hydraulic punch presses, small hydraulic testing machines, hydraulic baling machines and other equipment. It is also compatible with the auxiliary hydraulic circuits in some small construction machinery, such as the hydraulic control circuits of small loaders.
A complete list of EBG series models
This series of models forms multiple sub-models based on diameter, control mode, installation form, etc. The common complete models are as follows:
EBG – 03 – C – R – 20
EBG – 03 – H – 10
EBG – 03 – B – 50
EBG – 03 – C – T
EBG – 03 – H – T
EBG – 06 – C – 60T
EBG – 06 – H – 51
EBG – 06 – B – L
EBG – 10 – C – S – 30
EBG – 10 – H
EBG – 06 – C – R – 30
EBG – 10 – C – T
EBG – 06 – H – 61Y
EBG – 03 – A – 20
EBG – 10 – H – T
EBG-03 series
Ebg-03-c, EBG-03-H, EBG-03-C-T, EBG-03-H-T, EBG-03-C-R, EBG-03-H-R, EBG-03-C-L, EBG-03 -H-L, EBG-03-A45-R, EBG-03-B-50, EBG-03-H-10, EBG-03-C-R-20
EBG-06 series
EBG-06-C, EBG-06-H, EBG-06-C-T, EBG-06-H-T, EBG-06-C-L, EBG-06-H-R, EBG-06-B, EBG-06-BH -L, EBG-06-H-51, EBG-06-H-60T, EBG-06-H-61Y, EBG-06-C-T-51, EBG-06-C-R-30
EBG-10 series
EBG-10-C, EBG-10-H, EBG-10-C-T, EBG-10-H-T, EBG-10-H-R, EBG-10-C-S-30
Company Profile
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Yes, we are a manufacturer with our own factory.
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We accept T/T, L/C, PayPal, VISA, Western Union, Apple Pay, Google Pay, Afterpay (Clearpay), Klarna, and Trade Assurance.
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All products are tested before shipment to ensure perfect working condition.
We offer a 12-month warranty — if a product fails due to quality issues, we provide free spare parts or repair support.
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If you encounter any problem during use, please contact your sales manager or our support team at any time.
We will respond quickly and help solve the issue efficiently.
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- Hydraulic systems
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Yes. We offer competitive wholesale prices and try our best to give benefits to long-term partners.
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