YUKEN EHDG series high frequency response proportional valve
YUKEN EHDG Series High-Response Proportional Valve Model and Parameters
1. Model Designation
The complete model format of YUKEN EHDG series high-response proportional valve is: EHDG-01V-B-S-1-PNT15M10-50. 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) |
| EHDG | Proportional electro-hydraulic pilot relief valve (series code) |
| -01 | Valve size |
| V | Vent control of relief valve (omit if not required) |
| -B/-C/-H | Pressure adjustment range: B (0.5-6.9 MPa / 70-1000 psi), C (1-15.7 MPa / 145-2275 psi), H (1.2-24.5 MPa / 175-3550 psi) |
| -S/-L | Control type: S (open-loop with sensor), L (closed-loop) |
| -1 | With safety valve (omit if without safety valve) |
| -PN | P-line orifice (without orifice if omitted, standard type) |
| T15/T13/T11 | T-line orifice: T15 (for B range), T13 (for C range), T11 (for H range) |
| M10 | Standard orifice for P-B line |
| -50 | Design number |
2. Technical Specifications (Taking EHDG-01 as an Example)
| Specification Item | Value |
|---|---|
| Maximum Operating Pressure | 24.5 MPa (3550 psi) |
| Maximum Flow Rate | 2 L/min (0.53 U.S. gpm) |
| Minimum Flow Rate | 0.3 L/min (0.08 U.S. gpm) |
| Hysteresis | 1% or less (3% or less for open-loop type; value in parentheses is for closed-loop type) |
| Repeatability | 1% or less (tested under conditions similar to original testing) |
| Frequency Response | B: 10 Hz (-90 degree), C: 10 Hz (-90 degree), H: 12 Hz (-90 degree) |
| Supply Electric Power | 24 V DC (21 to 28 V DC, including ripple) |
| Maximum Power Input | 28 W |
| Input Signal | B: 6.9 MPa (1000 psi) / 5 V DC; C: 15.7 MPa (2275 psi) / 5 V DC; H: 24.5 MPa (3550 psi) / 5 V DC |
| Input Impedance | 10 kΩ |
| Alarm Signal Output (Open Collector) | Voltage: Max. 30 V DC; Current: Max. 40 mA |
| Pressure Signal Output | B: 5 V DC / 6.9 MPa (1000 psi); C: 5 V DC / 15.7 MPa (2275 psi); H: 5 V DC / 24.5 MPa (3550 psi) |
| Ambient Temperature | 0 – 50 °C (32 – 122 °F) (with circulated air) |
| Coil Resistance | 10 Ω |
3. Product Overview
YUKEN EHDG series is a type of proportional electro-hydraulic pilot relief valve, specifically designed for hydraulic systems that require small flow and continuous pressure regulation. It can also be used as a pilot control unit for other proportional valves. The valve features high response speed, stable performance, and precise pressure control, making it suitable for various industrial hydraulic applications that demand high control accuracy.
