DSG-03-3C6-24V DSG-03-3C3-A220-N1 Yuken Solenoid Valve 315 bar

Product Overview

The DSG-03 series solenoid directional valves are direct-acting wet-type solenoid directional valves engineered by Yuken for industrial hydraulic systems. Featuring wet armature (wet-type solenoid) design where the solenoid coil is fully immersed in hydraulic fluid, these valves deliver low noise, long service life, and zero external leakage.

The DSG-03 series conforms to NG10 (CETOP 5 / ISO 4401-05) mounting standards, with porting options including 3/8″ BSP and 1/2″ BSP. Valve bodies are manufactured from high-strength cast iron with optimized internal flow paths, delivering high-pressure, high-flow performance.

The DSG-03 series offers multiple spool types and multiple solenoid voltage options, covering mainstream voltages including DC24V, AC220V, and AC240V. Both Standard Type and Shockless Type are available to meet diverse application requirements.

⚠️ Model Code Decoding (using DSG-03-3C6-24V as example) :

• DSG = Direct-Acting Wet-Type Solenoid Directional Valve

• 03 = Valve size (NG10 / CETOP 5)

• 3C6 = Spool type code (3-position 4-way, C6 center condition)

• 24V = Solenoid voltage (DC24V)

• DL = With damping adjustment (reduces shock and noise)

Model Code Decoding (using DSG-03-3C3-A220-N1 as example) :

• DSG = Direct-Acting Wet-Type Solenoid Directional Valve

• 03 = Valve size (NG10 / CETOP 5)

• 3C3 = Spool type code (3-position 4-way, C3 center condition)

• A220 = Solenoid voltage (AC220V 50/60Hz)

• N1 = Electrical connection type (DIN 43650 connector with LED indicator)

⚠️ Model Notes:

• DSG-03-3C6-24V: 3-position 4-way valve, C6 center condition (Y-type), DC24V solenoid. Suitable for applications requiring center unload with smooth shifting.

• DSG-03-3C3-A220-N1: 3-position 4-way valve, C3 center condition (open center), AC220V solenoid, N1 DIN connector with LED indicator. Suitable for systems requiring P/A/B/T all open in center position.

• DSG-03-3C3-A220-DL: 3-position 4-way valve, C3 center condition (open center), AC220V solenoid, with damping adjustment (DL type) to reduce shifting shock and noise.

Technical Specifications 

DSG-03 Series General Specifications

• Product Series: Yuken DSG-03 series solenoid directional valve

• Product Type: Direct-acting wet-type solenoid directional valve

• Brand: Yuken

• Valve Size: 03 (NG10 / CETOP 5 / ISO 4401-05)

• Design Series: 50 Design Series (Standard) / 51 Design Series (Explosion Proof)

• Maximum Operating Pressure: 315 bar (31.5 MPa / 4,570 PSI)

• Maximum Flow Rate: 120 L/min (31.7 US GPM)

• Maximum T-Line Back Pressure: 160 bar (16 MPa / 2,320 PSI)

• Maximum Changeover Frequency: 240 cycles/min (DC solenoid); 120 cycles/min (R-type solenoid)

• Spool Types: 3C2 (closed center), 3C3 (open center), 3C4 (tandem center), 3C6 (Y-type center), 3C60 (float center), and more

• Mounting Type: Subplate mounting (ISO 4401-05 / CETOP 5)

• Mounting Bolts: M6 × 35 (4 pcs)

• Mounting Interface Standard: ISO 4401-05-02-0-05

• Hydraulic Fluid: Mineral oil (ISO VG 32-68)

• Fluid Temperature Range: -20°C to +80°C

• Fluid Cleanliness: ISO 4406 20/18/15 or better

• Ingress Protection: IP65 (with N1 connector installed)

• Weight: Approx. 3.6 kg (AC solenoid); Approx. 5.0 kg (DC/R/RQ solenoid)

Model Specifications Overview

• DSG-03-3C6-24V: 3-position 4-way, C6 center condition (Y-type), DC24V solenoid

• DSG-03-3C3-A220-N1: 3-position 4-way, C3 center condition (open), AC220V solenoid, N1 DIN connector with LED indicator

• DSG-03-3C3-A220-DL: 3-position 4-way, C3 center condition (open), AC220V solenoid, with damping adjustment (DL type)

Key Technical Advantages

1. Wet Armature Design – Low Noise, Long Life, Zero External Leakage

The DSG-03 series features wet armature (wet-type solenoid) design. The solenoid’s moving core operates fully immersed in hydraulic fluid, providing excellent heat dissipation and low noise characteristics. The wet-type construction eliminates the dynamic seal leakage risk found in traditional dry-type solenoids, ensuring zero oil leakage to the outside while significantly extending solenoid service life.

2. High Pressure, High Flow – 315 bar / 120 L/min

The DSG-03 series supports maximum operating pressures up to 315 bar and flow rates up to 120 L/min. This performance positions the DSG-03 as a benchmark high-pressure, high-flow product in the NG10 solenoid valve category. Ports P, A, and B are rated at 315 bar, with T-port back pressure capacity up to 160 bar.

3. Wide Range of Spool Types and Voltage Options – Flexible System Adaptation

The DSG-03 series offers multiple spool types (3C2 closed, 3C3 open, 3C4 tandem, 3C6 Y-type, 3C60 float, etc.), covering applications from cylinder locking to center unloading. Voltage options include DC24V, AC220V (50/60Hz), AC240V, and more, accommodating power standards across global regions.

4. Shockless Type – Significantly Reduced System Shock and Noise

Beyond the standard DSG-03 series, Yuken offers the S-DSG-03 Shockless Type. This variant optimizes spool shifting speed to substantially reduce shifting shock and pipe vibration noise, making it particularly suitable for precision equipment and high-end mobile machinery where system smoothness is critical.

5. Explosion Proof Type – For Hazardous Environments

The DSG-03 series is available in an Explosion Proof (Flameproof) Type version (51 Design Series). Featuring a fully enclosed pressure-proof explosion-proof construction, this variant effectively contains any internal ignition and prevents flame propagation to the external environment. Certified for use in Danger Zones 1 & 2, it has obtained certification from the Technology Institution of Industrial Safety (TIIS) in Japan.

6. CETOP 5 Standard Mounting Interface – 100% Interchangeability

The DSG-03 series strictly conforms to ISO 4401-05 (CETOP 5 / NFPA D03) standard mounting interfaces. All solenoid valves of the same size across brands are physically and port-wise identical, enabling 100% direct interchangeability without any manifold modification or system adjustment. Every unit undergoes 100% simulated operating condition bench testing prior to shipment.

Application Areas

• Construction Machinery: Directional control for excavators, wheel loaders, cranes

• Injection Molding Machinery: Cylinder directional control for injection molding and die-casting machines

• Machine Tools & Automation: Directional control for CNC machines and hydraulic clamping systems

• Mobile Machinery: Hydraulic system control for agricultural machinery and specialty vehicles

• Metallurgical Equipment: Directional control for rolling mills and continuous casting equipment

• Explosion-Proof Environments: Petrochemical, mining, and other hazardous area hydraulic systems (requires Explosion Proof Type)

Expert Maintenance Tips

1. Verify Model and System Compatibility Prior to Installation

The DSG-03 series offers multiple spool types and voltage options. Confirm prior to installation:

• Spool type matches system control requirements (3C2 closed / 3C3 open / 3C6 Y-type, etc.)

• Solenoid voltage matches control system power supply (DC24V / AC220V / AC240V)

• Seal material is compatible with the hydraulic fluid type

2. Mounting Surface and Bolt Torque

The DSG-03 series conforms to ISO 4401-05 (CETOP 5) standard mounting interfaces. Ensure the mounting surface is clean, scratch-free, and meets flatness specifications prior to installation. Use M6×35 socket head cap screws (4 pcs) and tighten diagonally in sequence. Refer to Yuken technical manuals for recommended torque values.

3. Fluid Cleanliness Management

The DSG-03 series features precision spool construction and demands adequate fluid cleanliness. Recommended system cleanliness: ISO 4406 Code 20/18/15 or better. Install high-precision filters (filtration rating ≤10μm) in the system return line and inspect filter elements regularly.

4. Electrical Connection

• DC24V models: Voltage tolerance ±10% (20.4 – 26.4 VDC), rated current approx. 1.1A

• AC220V models: Voltage tolerance ±15%, 50/60Hz compatible

• N1 connector is DIN 43650 Form A standard with integrated LED indicator

• DL type (with damping adjustment) allows adjustment of damping screw to reduce shifting shock and noise

5. T-Port Back Pressure Limitation

The T-port (return port) maximum back pressure for the DSG-03 series is 160 bar. Ensure T-port return line back pressure does not exceed this value, as excessive back pressure may affect proper spool shifting.

6. Periodic Functional Checks

Perform functional checks every 2,000 operating hours or annually, including: shifting action verification, solenoid coil resistance check, spool shifting smoothness inspection, and external leakage inspection. If abnormalities are observed, arrange for servicing or replacement.