G-DSG Series Shockless Directional Valves (YUKEN)

G-DSG Series Shockless Directional Valves are advanced hydraulic control components manufactured by **YUKEN Kogyo Co., Ltd.** (油研工业株式会社), designed specifically to minimize hydraulic shock and vibration during valve actuation. These solenoid-operated directional valves feature an innovative electronic control system that allows precise adjustment of spool shifting time, providing smooth start-stop operation for hydraulic actuators.

  Core Features & Technology

1. **Adjustable Shifting Time**

   - Unique electronic circuit enables adjustment of spool movement duration (**0.1–1 second** range for both ON and OFF transitions)

   - Addresses limitation of conventional shockless valves with fixed shifting times

   - Micro-USB connector for easy programming of the on-board amplifier

2. **Shock Reduction Design**

   - Special spool profile minimizes pressure surges during direction changes

   - Significantly reduces noise and vibration caused by "oil hammering" effects

   - Enables smooth acceleration/deceleration of hydraulic cylinders and motors

3. **Electrical Interface**

   - Input voltage: **5–48 V DC** (stable power supply recommended)

   - Constant current operation: **10 mA** (via built-in constant-current circuit)

   - Compatible with both Sink Type and Source Type input interfaces

   - Power consumption at 24V: **36 W**

  Technical Specifications

| Parameter | Value | Notes |

|-----------|-------|-------|

| **Max. Operating Pressure** | 25 MPa (3,630 psi) | Lower than standard DSG series (31.5 MPa) due to shockless design |

| **Sizes Available** | D03 (ISO 4401-03), D05 (ISO 4401-05) | Common industry standard mounting patterns |

| **Flow Capacity** | Up to 120 L/min (31.7 US GPM) | Dependent on specific model variant |

| **Solenoid Type** | Wet armature | Longer service life (>10 million cycles) and lower noise |

| **Mounting** | Sub-plate mounting | Standard ISO 4401 interface for easy integration |

| **Fluid Compatibility** | Mineral oil, water-glycol emulsions | Standard hydraulic fluids within recommended viscosity range |

  Applications

G-DSG Series valves excel in applications where **smooth operation** and **shock reduction** are critical:

- Precision machine tools (CNC, grinding machines) requiring vibration-free motion

- Material handling equipment (cranes, lifts) to prevent load sway

- Injection molding machines for controlled mold opening/closing

- Presses and forming machines to reduce tool wear and noise

- Test rigs and simulation equipment needing precise motion control

- Any system where component longevity and operator comfort are priorities

  Model Nomenclature (Example: G-DSG-03-3C40-S-5090)

| Code | Meaning |

|------|---------|

| G | G-Series (Shockless, shifting time adjustable) |

| DSG | Solenoid Operated Directional Valve |

| 03 | Size (D03, ISO 4401-03) |

| 3C40 | Spool type (3-position, C-center, 40-series) |

| S | Solenoid specification (e.g., standard, low power) |

| 5090 | Additional features (e.g., coil type, voltage) |

  Key Advantages

1. **Customizable Performance**: Tailor shifting time to match specific system dynamics

2. **Extended Component Life**: Reduced shock loads protect pumps, hoses, and actuators

3. **Improved Process Control**: Precise start-stop minimizes product defects in manufacturing

4. **Lower Operating Costs**: Decreased maintenance and downtime from reduced mechanical stress

5. **Enhanced Safety**: Reduced vibration improves operator comfort and machine stability

 Installation & Setup

1. **Mounting**: Follow ISO 4401 sub-plate specifications for leak-free installation

2. **Electrical Connection**: Use stable DC power supply within 5–48V range

3. **Programming**: Connect via micro-USB to adjust shifting time (0.1–1s) using YUKEN software

4. **Maintenance**: Regular fluid filtration (ISO 18/15) recommended for optimal performance

5. **Troubleshooting**: Refer to YUKEN technical manual for diagnostic procedures

  Additional Information

- **Certifications**: CE certified for use in EU equipment; UL/CSA certified versions available

- **Accessories**: Coil protectors, DIN connectors, and mounting kits available

- **Technical Support**: YUKEN global network provides application engineering assistance

- **Replacement**: Directly interchangeable with standard DSG series valves in most installations

For complete specifications and detailed application guidelines, refer to the official YUKEN "G" Series Shockless Type Solenoid Operated Directional Valves catalog (EIC-E-1011-0).