DSG-03 Series Solenoid Operated Directional Valves
The DSG-03 Series is a widely recognized family of 3/8″ (NG10/CETOP 5) solenoid operated directional control valves primarily manufactured by YUKEN and other hydraulic component suppliers. These valves are designed for precise control of hydraulic fluid flow direction, pressure, and flow rate in industrial hydraulic systems.
Core Features & Advantages
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Feature
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Description
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High Performance
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Operates at 31.5 MPa (4500 PSI) max pressure and 120 L/min (31.7 USgpm) max flow rate for demanding applications
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Wet Solenoid Technology
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Long service life (up to 50 million spool shifts), low noise, and zero external leakage
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Versatile Configurations
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Available in 4/3 (three-position, four-way) and 4/2 (two-position, four-way) spool types with various neutral functions
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Stable Operation
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High absorption and powerful return springs ensure reliable performance even with minor contamination
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Global Compliance
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UL/CSA certified and CE marked options for international equipment compatibility
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Low Noise Design
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Special DL-type coils with damping reduce shock and operational noise
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Technical Specifications
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Parameter
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Value
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Nominal Size
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3/8″ (NG10, CETOP 5)
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Max Operating Pressure
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31.5 MPa (315 bar, 4500 PSI)
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Max Flow Rate
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120 L/min (31.7 USgpm) standard; 240 L/min for 3C60 models
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Max T-Line Back Pressure
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0.5 MPa (5 bar, 72.5 PSI)
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Operating Temperature
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-20°C to +80°C (-4°F to +176°F)
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Voltage Options
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AC: 110V, 220V, 240V; DC: 12V, 24V, 48V
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Mounting Standard
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ISO 4401-05, DIN 24340 A5, NF E 49-008-5
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Seal Material
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Nitrile rubber (NBR) standard; Viton available for high-temperature applications
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Model Number Breakdown (YUKEN Standard)
DSG-03-3C2–D24–50–DL
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Component
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Meaning
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DSG
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Series designation: Solenoid Operated Directional Valve
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03
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Nominal size: 3/8″ (NG10)
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3C2
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Spool type: 3-position, 4-way, C2 (Y-type) neutral function
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D24
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Coil voltage: DC 24V (A=AC, D=DC)
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50
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Series version: Standard 50 series
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DL
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Coil type: With indicator light and damping function
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Common spool functions:
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3C2 (Y-type): P-T connected (system unload), A-B blocked in neutral
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3C4 (O-type): All ports blocked in neutral (load holding)
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3C6: With adjustable damping for smooth transitions
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2B2: 2-position, 4-way, spring return
Operational Principles
DSG-03 valves use solenoid actuation to shift a spool within the valve body, redirecting hydraulic fluid between ports P (pressure), T (tank), A, and B (work ports):
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De-energized State: Spring returns spool to neutral position
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Energized State: Solenoid force overcomes spring resistance, shifting spool to desired position
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Flow Control: Spool position determines which ports are connected, controlling actuator movement (cylinder extension/retraction, motor rotation direction)
Applications
These valves are extensively used in:
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Injection Molding Machines: Control mold clamping, injection unit positioning
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Hydraulic Presses: Manage ram movement and pressure cycles
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Machine Tools: Table positioning, spindle control
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Plastic Processing Equipment: Extruder screw drive, die head movement
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Construction Machinery: Boom, arm, and bucket control (in some applications)
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Material Handling Systems: Conveyor positioning, lift control
Installation & Maintenance Tips
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Mounting: Ensure proper alignment with ISO 4401-05 standard mounting surface
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Fluid Cleanliness: Maintain ISO 4406 Class 18/15/12 or better for extended service life
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Voltage Check: Verify coil voltage matches system specifications before energization
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Leakage Prevention: Use proper torque on mounting bolts (refer to manufacturer guidelines)
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Regular Inspection: Check for abnormal noise, overheating, or external leaks
Key Variations
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Standard Type: 31.5 MPa, 120 L/min, basic spool functions
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High Flow Type (3C60): 240 L/min flow capacity for high-demand systems
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Flameproof Type: For hazardous environments (certified by Japanese Industrial Safety Institute)
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Low Power Consumption Type: Energy-efficient coils for battery-powered systems
DSG-03 series valves offer a balance of performance, reliability, and versatility, making them a preferred choice for industrial hydraulic systems worldwide. Specific details may vary by manufacturer, so always consult the official product documentation for your application.
