YUKEN ESVG series servo proportional valve
YUKEN ESVG Series Servo Proportional Valve Model and Parameters
1. Model Designation
The complete model format of YUKEN ESVG series servo proportional valve is: ESVG-01-20-C-EH-50. Each segment of the model has a specific meaning, as detailed below:
| Model Segment | Description |
| F- | Special seals for phosphate ester type fluid (omit if not required) |
| ESVG | Electro-hydraulic servo proportional valve (series code) |
| -01/-03 | Valve size: 01 (small flow), 03 (medium flow) |
| -20/-40/-60 | Flow grade: 20 (20 L/min), 40 (40 L/min), 60 (60 L/min) (rated flow) |
| -C/-H | Pressure range: C (1.6-15.7 MPa / 232-2275 psi), H (1.8-24.5 MPa / 261-3550 psi) |
| -EH/-N | Control mode: EH (integrated amplifier), N (external amplifier) |
| -50/-51 | Design number (50: standard type, 51: enhanced anti-pollution type) |
| -R/-L | Installation direction: R (right-hand installation), L (left-hand installation, omit if standard) |
2. Technical Specifications (Taking ESVG-01 as an Example)
| Specification Item | Value |
| Maximum Operating Pressure | 31.5 MPa (4568 psi) |
| Rated Flow Rate | 20 L/min (5.28 U.S. gpm) |
| Minimum Flow Rate | 0.5 L/min (0.13 U.S. gpm) |
| Hysteresis | ±0.5% or less (under rated conditions) |
| Repeatability | ±0.3% or less (tested at 25℃ ambient temperature) |
| Frequency Response | 50 Hz (-90 degree), 100 Hz (-3 dB) |
| Supply Electric Power | 24 V DC (18 to 30 V DC, including ripple) |
| Maximum Power Input | 35 W (for EH type with integrated amplifier) |
| Input Signal | 4-20 mA DC or 0-10 V DC (selectable via wiring) |
| Input Impedance | 250 Ω (for 4-20 mA), 10 kΩ (for 0-10 V DC) |
| Position Feedback Signal | 4-20 mA DC (corresponding to 0-100% valve opening) |
| Ambient Temperature | -20 – 80 °C (-4 – 176 °F) (with circulated air) |
| Oil Cleanliness Requirement | NAS 7 class or higher (recommended NAS 6 class) |
| Coil Resistance | 15 Ω (at 25℃ ambient temperature) |
3. Product Overview
YUKEN ESVG series is a high-performance electro-hydraulic servo proportional valve, integrated with advanced servo control technology and precise hydraulic structure design. It is specially developed for hydraulic systems that require high-precision flow and pressure regulation, and can realize continuous and stepless adjustment of fluid flow or pressure according to the input electrical signal. The valve features ultra-high control precision, fast frequency response, strong anti-pollution ability and stable long-term operation, which is widely used in precision machine tools, injection molding machines, die-casting machines, metallurgical equipment and other industrial fields that demand high control accuracy and dynamic response performance. It can also be seamlessly connected with PLC, CNC and other control systems to realize intelligent and automated control of the hydraulic system.
