DSG-03-3C2/3C3/3C4/3C5/3C60 Yuken Solenoid Directional Valve 315 bar 120 L/min

Product Overview

The YUKEN DSG-03 series solenoid-operated directional control valves (models: DSG-03-3C2 / 3C3 / 3C4 / 3C5 / 3C60) represent over half a century of hydraulic control engineering excellence from YUKEN KOGYO, Japan. These 4/3-way (three-position, four-port) wet-type solenoid directional valves feature NG10 (CETOP 05 / NFPA D05) subplate mounting interfaces.

The DSG-03 series strictly conforms to ISO 4401-AC-05-4-A, CETOP R35H 4.2-4-05, and NFPA D05 standard mounting patterns. The valve body is manufactured from high-strength ductile cast iron with wet-type solenoids, delivering smooth shifting, low noise, long service life, and zero external leakage. The series achieves a maximum operating pressure of 31.5 MPa (315 bar / 4,570 psi) and a maximum flow rate of 120 L/min (31.7 GPM) .

The five spool configurations covered (3C2 / 3C3 / 3C4 / 3C5 / 3C60) address a comprehensive range of neutral position functions—from all-ports-blocked to pump-unloading configurations—making them suitable for injection molding machines, presses, construction equipment, machine tools, and automation systems.

Interchangeability Note: All five models belong to the DSG-03 series with identical mounting interface dimensions (ISO 4401-AC-05-4-A / CETOP 05 / NFPA D05), enabling seamless drop-in replacement for original YUKEN valves on identical mounting surfaces. Every unit undergoes 100% simulated in-service testing to ensure it meets design performance targets immediately upon installation.

Technical Specifications (Bulleted List)

DSG-03-3C2

• Brand / Series: YUKEN DSG-03

• Valve Type: 4/3-way solenoid-operated directional control valve

• Mounting Interface Size: NG10 (CETOP 05 / NFPA D05)

• Mounting Interface Standards: ISO 4401-AC-05-4-A / CETOP R35H 4.2-4-05

• Max. Operating Pressure (P, A, B ports): 31.5 MPa (315 bar / 4,570 psi)

• Max. Tank Line Pressure (T port): 16 MPa (160 bar / 2,320 psi)

• Max. Flow Rate: 120 L/min (31.7 GPM)

• Spool Configuration (Neutral): 3C2 — All ports blocked (P, A, B, T closed)

• Spool Type: 3-position, 4-way, spring centered

• Actuation: Solenoid-operated (wet-type)

• Housing Material: Ductile cast iron

• Hydraulic Fluid: Mineral oil-based or synthetic fluids with lubricating properties

• Viscosity Range: 15 – 400 mm²/s (cSt)

• Fluid Temperature Range: -15°C to +70°C (5°F to 158°F)

• Max. Changeover Frequency: 240 cycles/min

• Manual Override: Standard push pin

• Mounting Type: Subplate mounting

• Weight: Approx. 5.0 kg

• Country of Origin: Japan

DSG-03-3C3

• Brand / Series: YUKEN DSG-03

• Valve Type: 4/3-way solenoid-operated directional control valve

• Mounting Interface Size: NG10 (CETOP 05 / NFPA D05)

• Mounting Interface Standards: ISO 4401-AC-05-4-A / CETOP R35H 4.2-4-05

• Max. Operating Pressure (P, A, B ports): 31.5 MPa (315 bar / 4,570 psi)

• Max. Tank Line Pressure (T port): 16 MPa (160 bar / 2,320 psi)

• Max. Flow Rate: 120 L/min (31.7 GPM)

• Spool Configuration (Neutral): 3C3 — P→T open, A and B blocked

• Spool Type: 3-position, 4-way, spring centered

• Actuation: Solenoid-operated (wet-type)

• Housing Material: Ductile cast iron

• Hydraulic Fluid: Mineral oil-based or synthetic fluids with lubricating properties

• Viscosity Range: 15 – 400 mm²/s (cSt)

• Fluid Temperature Range: -15°C to +70°C

• Max. Changeover Frequency: 240 cycles/min

• Manual Override: Standard push pin

• Mounting Type: Subplate mounting

• Weight: Approx. 5.0 kg

• Country of Origin: Japan

DSG-03-3C4

• Brand / Series: YUKEN DSG-03

• Valve Type: 4/3-way solenoid-operated directional control valve

• Mounting Interface Size: NG10 (CETOP 05 / NFPA D05)

• Mounting Interface Standards: ISO 4401-AC-05-4-A / CETOP R35H 4.2-4-05

• Max. Operating Pressure (P, A, B ports): 31.5 MPa (315 bar / 4,570 psi)

• Max. Tank Line Pressure (T port): 16 MPa (160 bar / 2,320 psi)

• Max. Flow Rate: 120 L/min (31.7 GPM)

• Spool Configuration (Neutral): 3C4 — P blocked, A and B connected to T

• Spool Type: 3-position, 4-way, spring centered

• Actuation: Solenoid-operated (wet-type)

• Housing Material: Ductile cast iron

• Hydraulic Fluid: Mineral oil-based or synthetic fluids with lubricating properties

• Viscosity Range: 15 – 400 mm²/s (cSt)

• Fluid Temperature Range: -15°C to +70°C

• Max. Changeover Frequency: 240 cycles/min

• Manual Override: Standard push pin

• Mounting Type: Subplate mounting

• Weight: Approx. 5.0 kg

• Country of Origin: Japan

DSG-03-3C5

• Brand / Series: YUKEN DSG-03

• Valve Type: 4/3-way solenoid-operated directional control valve

• Mounting Interface Size: NG10 (CETOP 05 / NFPA D05)

• Mounting Interface Standards: ISO 4401-AC-05-4-A / CETOP R35H 4.2-4-05

• Max. Operating Pressure (P, A, B ports): 31.5 MPa (315 bar / 4,570 psi)

• Max. Tank Line Pressure (T port): 16 MPa (160 bar / 2,320 psi)

• Max. Flow Rate: 120 L/min (31.7 GPM)

• Spool Configuration (Neutral): 3C5 — A and P connected to T, B blocked

• Spool Type: 3-position, 4-way, spring centered

• Actuation: Solenoid-operated (wet-type)

• Housing Material: Ductile cast iron

• Hydraulic Fluid: Mineral oil-based or synthetic fluids with lubricating properties

• Viscosity Range: 15 – 400 mm²/s (cSt)

• Fluid Temperature Range: -15°C to +70°C

• Max. Changeover Frequency: 240 cycles/min

• Manual Override: Standard push pin

• Mounting Type: Subplate mounting

• Weight: Approx. 5.0 kg

• Country of Origin: Japan

DSG-03-3C60

• Brand / Series: YUKEN DSG-03

• Valve Type: 4/3-way solenoid-operated directional control valve

• Mounting Interface Size: NG10 (CETOP 05 / NFPA D05)

• Mounting Interface Standards: ISO 4401-AC-05-4-A / CETOP R35H 4.2-4-05

• Max. Operating Pressure (P, A, B ports): 31.5 MPa (315 bar / 4,570 psi)

• Max. Tank Line Pressure (T port): 16 MPa (160 bar / 2,320 psi)

• Max. Flow Rate: 120 L/min (31.7 GPM)

• Spool Configuration (Neutral): 3C60 — All ports blocked (P, T, A, B closed)

• Spool Type: 3-position, 4-way, spring centered

• Actuation: Solenoid-operated (wet-type)

• Housing Material: Ductile cast iron

• Hydraulic Fluid: Mineral oil-based or synthetic fluids with lubricating properties

• Viscosity Range: 15 – 400 mm²/s (cSt)

• Fluid Temperature Range: -15°C to +70°C

• Max. Changeover Frequency: 240 cycles/min

• Manual Override: Standard push pin

• Mounting Type: Subplate mounting

• Weight: Approx. 5.0 kg

• Country of Origin: Japan

Key Technical Advantages

1. Wet-Type Solenoid Technology – Low Noise & Extended Service Life
The DSG-03 series employs wet-type solenoid design, where the solenoid plunger operates directly within the hydraulic fluid. This delivers three core benefits: ① Fluid continuously dissipates heat generated by the solenoid, ensuring low temperature rise and extended coil life; ② The plunger benefits from fluid lubrication and damping, resulting in reduced shifting shock and low noise; ③ No dynamic seals between the solenoid and valve body, eliminating external leakage risks.

2. High Pressure & High Flow – Superior Power Density
Within the compact NG10 (CETOP 05) mounting footprint, the DSG-03 series delivers 31.5 MPa (315 bar) maximum operating pressure and 120 L/min maximum flow capacity. Optimized flow path design minimizes internal pressure drop, ensuring excellent shifting performance even under high-flow conditions.

3. Multiple Spool Configurations – Versatile System Integration
The five spool configurations cover the most commonly required neutral position functions in hydraulic systems:

• 3C2 (All ports blocked): Ideal for pressure-holding circuits requiring positive shut-off

• 3C3 (P→T open, A/B blocked): Ideal for pump unloading in standby circuits

• 3C4 (P blocked, A/B to T): Ideal for actuator floating or unloading circuits

• 3C5 (A/P to T, B blocked): Ideal for special control requirements of asymmetric actuators

• 3C60 (All ports blocked, upgraded 3C2): Ideal for pressure-holding and locking applications with stricter sealing requirements

4. Internationally Standardized Mounting – Global Compatibility
The DSG-03 series mounting interface strictly conforms to ISO 4401-AC-05-4-A, CETOP R35H 4.2-4-05, and NFPA D05 international standards, enabling seamless integration with the vast majority of NG10 hydraulic systems worldwide—true drop-in interchangeability.

5. Standard Manual Override – Hassle-Free Commissioning
All models feature a standard manual override pin, allowing manual spool shifting during power loss or control system failure. This feature proves invaluable during system commissioning, emergency operations, and maintenance.

6. High-Frequency Shifting Capability – Ideal for High-Speed Automation
The DSG-03 series achieves a maximum changeover frequency of 240 cycles/min, meeting the demanding requirements of high-speed automation equipment such as injection molding machines and high-speed presses.

Application Areas

General Application Fields: Injection molding machinery, rubber machinery, presses and forging equipment, construction and mobile hydraulics, machine tools and automated production lines, marine hydraulic systems, metallurgical equipment, test benches and laboratory equipment.

Expert Maintenance Tips

1. Mounting Surface Verification & Port Identification
Before installation, verify that the system subplate conforms to ISO 4401-AC-05-4-A / CETOP 05 standards. Standard port designation: P (pressure), T (tank), A / B (working ports). Tighten mounting bolts (typically M6 × 40-45) to the manufacturer-recommended torque of 8-10 Nm to avoid housing distortion that could cause spool sticking.

2. Fluid Cleanliness Management
The DSG-03 series employs spool-type construction with extremely tight clearances between the spool and housing (typically 3-5 μm). A minimum fluid cleanliness level of ISO 4406 Class 21/18/15 is recommended to prevent contaminant particles from causing spool sticking. Install return-line filters with filtration rating ≤ 10 μm upstream of the valve.

3. Electrical Connection Practices
DSG-03 series solenoids use DIN 43650 standard electrical connectors. Always verify that the supply voltage matches the solenoid rated voltage (DC 24V or AC variants). N1-type connectors with indicator lights are recommended for quick visual diagnosis of solenoid energization status.

4. Manual Override Usage
The operating force and stroke of the manual push pin vary by model. Always perform manual override tests with the system fully depressurized. The manual override is intended for emergency and commissioning purposes only—not for continuous shifting operations.

5. Periodic Maintenance & Inspection
A comprehensive inspection of DSG-03 series valves is recommended every 12 months or 2,000 operating hours (whichever comes first): ① Measure solenoid coil resistance and insulation performance; ② Verify smooth spool movement (via manual override test); ③ Check mounting bolts for loosening; ④ Inspect electrical connectors for reliable connection, oxidation, or corrosion.