Product Overview
The DSV-G03-2C-DC24-82, DSV-G03-6C-DC24-82, and DSD-G02-0C-A110-31 are wet-armature solenoid operated directional control valves from the Taiwan-based 7OCEAN (SEVEN OCEAN HYDRAULICS) group. Established in 1989, Seven Ocean Hydraulics has over 30 years of experience in hydraulic valve manufacturing, with products widely used in injection molding machines, die-casting machines, construction machinery, machine tools, and various industrial and mobile hydraulic systems.
DSV-G03-2C-DC24-82 & DSV-G03-6C-DC24-82:
Both products belong to the DSV-G03 series—G03 size corresponds to NG10 / CETOP 5 / ISO 4401-05 mounting standards. The valve body is constructed from high-strength iron castings with wide internal passages to minimize pressure drop. The DSV series features conduit terminal box connection (G1/2 thread with indicator light), with a compact valve body design that reduces system installation space requirements.
Both models feature double solenoid, spring centered configuration (C code), with the primary difference being the spool type:
2C: Closed center — all ports blocked in neutral position
6C: Closed center — P port blocked, A and B ports open to T in neutral position
DSD-G02-0C-A110-31:
The DSD-G02-0C-A110-31 belongs to the DSD-G02 series—G02 size corresponds to NG6 / CETOP 3 / NFPA D03 / ISO 4401-03 mounting standards. The DSD series features DIN 43650 type electrical connector (ISO 4400 standard). This valve features single solenoid, spring offset configuration (0C code), with Type 0 spool being open center — all ports interconnected in neutral position.
Both series employ wet-armature solenoid design—internal moving parts operate submerged in hydraulic fluid, providing a cushioning effect that ensures smooth, quiet operation even under high-pressure, high-frequency switching conditions. The products have passed 10 million cycle endurance testing for proven reliability.
As original 7OCEAN solenoid directional valves, these products offer complete interchangeability within the same series and size, requiring no modifications to mounting interfaces or piping layouts.
Model Code Breakdown:
DSV-G03-2C-DC24-82 / DSV-G03-6C-DC24-82:
DSV – Conduit terminal box connection (G1/2 thread, with indicator light)
G03 – G03 Series, NG10 / CETOP 5 / ISO 4401-05 mounting
2C / 6C – Spool type + Spring configuration (C = double solenoid, spring centered)
DC24 – Coil voltage (DC 24V)
82 – Factory internal configuration/design code
DSD-G02-0C-A110-31:
DSD – DIN 43650 type electrical connector
G02 – G02 Series, NG6 / CETOP 3 / NFPA D03 / ISO 4401-03 mounting
0C – Spool type (0 = open center, all ports open) + Spring configuration (C = double solenoid, spring centered)
A110 – Coil voltage (AC 110V, 50/60Hz)
31 – Factory internal configuration/design code
Technical Specifications
DSV-G03 Series (G03 / NG10 / CETOP 5) Common Specifications:
Brand: 7OCEAN / SEVEN OCEAN HYDRAULICS
Series: DSV-G03 Series
Mounting Standard: ISO 4401-05 / CETOP 5 / NFPA D05
Maximum Operating Pressure: 250 bar (3571 PSI)
Maximum Flow Rate: 160 L/min (42 GPM)
Maximum Permissible Back Pressure: 160 bar (2285 PSI)
Maximum Changeover Frequency: 180 cycles/min (AC/DC)
Protection Class: IEC 144 Class IP65
Ambient Temperature Range: -15°C ~ +50°C
Fluid Temperature Range: -15°C ~ +70°C
Viscosity Range: 15~400 mm²/s
Recommended Hydraulic Oil: ISO VG32, 46, 68
Recommended Filtration: 25 μm
Mounting Screws: M6 × 35L (4 pcs)
Tightening Torque: 12~15 N·m
Weight: Approx. 4.4 kg (DC type)
DSV-G03-2C-DC24-82 Specifications:
Model: DSV-G03-2C-DC24-82
Spool Configuration: 2C (double solenoid, spring centered; closed center — all ports blocked)
Coil Voltage: DC 24V
Electrical Connection: Conduit terminal box (G1/2 thread, with indicator light)
Solenoid Configuration: Double Solenoid
Spring Arrangement: Spring Centered
Body Material: High-strength cast iron
Design Code: 82
DSV-G03-6C-DC24-82 Specifications:
Model: DSV-G03-6C-DC24-82
Spool Configuration: 6C (double solenoid, spring centered; closed center — P blocked, A and B to T)
Coil Voltage: DC 24V
Electrical Connection: Conduit terminal box (G1/2 thread, with indicator light)
Solenoid Configuration: Double Solenoid
Spring Arrangement: Spring Centered
Body Material: High-strength cast iron
Design Code: 82
DSD-G02-0C-A110-31 Specifications:
Model: DSD-G02-0C-A110-31
Series: DSD-G02 Series
Mounting Standard: NG6 / CETOP 3 / NFPA D03 / ISO 4401-03
Maximum Operating Pressure: 350 bar (5000 PSI)
Maximum Flow Rate: 110 L/min (29 GPM)
Maximum Back Pressure: 220 bar (3190 PSI)
Spool Configuration: 0C (single solenoid, spring offset; open center — all ports open)
Coil Voltage: AC 110V, 50/60Hz
Electrical Connection: DIN 43650 type connector
Solenoid Configuration: Single Solenoid
Spring Arrangement: Spring Offset
Body Material: High-strength cast iron
Protection Class: IP65
Endurance Test: 10 million cycles
Design Code: 31
Key Technical Advantages
1. Wet-Armature Solenoid Design for Quiet, Long-Life Operation
The DSV/DSD series features wet-armature solenoid design—internal moving parts operate fully submerged in hydraulic fluid. This design provides a cushioning effect that ensures smooth, quiet operation even under high-pressure, high-frequency switching, while effectively extending solenoid service life. Coils are covered with BMC fireproof material for excellent insulation.
2. Optimized Spool Design for Reduced Flow Forces
Optimized spool design effectively reduces flow forces generated within the valve. The five-chamber valve body design withstands high pressure and high back pressure. High-strength cast iron construction with wide internal passages minimizes pressure drop.
3. 10 Million Cycle Endurance Validation
Products have passed 10 million cycle endurance testing for proven reliability. Suitable for industrial and mobile applications requiring long life and high repetitive cycle rates.
4. Built-in Surge Suppression and Manual Override
DC terminal box type features built-in surge suppressor. All models are equipped with manual solenoid override for emergency directional control during power failure or emergency situations.
5. International Standard Compliance and High Installation Compatibility
DSV-G03 series mounting conforms to ISO 4401-05 / CETOP 5 / NFPA D05 standards. DSD-G02 series mounting conforms to NG6 / CETOP 3 / NFPA D03 / ISO 4401-03 standards. Fully compatible with globally adopted interfaces for direct replacement of same-series, same-specification products.
6. Flexible Electrical Connection and Voltage Options
DSV series features conduit terminal box connection (G1/2 thread with standard indicator light); DSD series features DIN 43650 type connector. Supports multiple AC/DC voltage options (AC100/110/120/220/240V, DC12/24V). DC terminal box type features built-in surge suppressor to protect solenoid coils and control circuits.
Application Areas
Injection Molding Machinery — Directional control and flow switching for injection molding machine hydraulic systems
Die-Casting Machines — Directional control for high-pressure casting equipment hydraulic systems
Hydraulic Presses and Forging Equipment — Directional control for presses and forming equipment
Construction and Mining Machinery — Hydraulic systems for excavators, loaders, and mobile equipment
CNC Machine Tools — Directional control for machine tool hydraulic systems
Hydraulic Power Units (HPU) — Directional control and system switching for hydraulic stations
Material Handling and Lifting Equipment — Hydraulic control for forklifts, lift platforms, and cranes
Woodworking Machinery and Cutting Machines — Hydraulic actuator control for specialty equipment
Expert Maintenance Tips
1. Installation Guidelines
DSV-G03 series mounting must conform to ISO 4401-05 / CETOP 5 / NFPA D05 standards. Use M6×35L mounting bolts (4 pcs) with tightening torque of 12–15 N·m.
DSD-G02 series mounting must conform to NG6 / CETOP 3 / NFPA D03 / ISO 4401-03 standards.
Thoroughly clean the mounting surface and all ports (P, A, B, T) before installation to prevent foreign particles from entering the valve and causing spool sticking or seal damage.
Both G02 and G03 series feature subplate/manifold mounting—pay attention to alignment with locating pins during installation.
2. Hydraulic Fluid Cleanliness
Recommended fluid cleanliness: 25 μm or better.
Use ISO VG32, 46, or 68 mineral hydraulic oil.
Install a return line filter with minimum 10 μm filtration rating to ensure fluid entering the valve meets cleanliness requirements.
3. Electrical Connection Specifications
DSV-G03-2C-DC24-82 and DSV-G03-6C-DC24-82 use DC 24V supply; DSD-G02-0C-A110-31 uses AC 110V supply (50/60Hz). Verify supply voltage matches coil rated voltage before connection.
DSV series features conduit terminal box connection (G1/2 thread); DSD series features DIN 43650 type connector. Ensure the connector is fully locked to prevent contact issues caused by vibration—IP65 protection is achieved with properly installed connector.
DC terminal box type features built-in surge suppressor to protect circuits from voltage spikes.
4. Operating Environment and Temperature Management
Ambient temperature range: -15°C~+50°C; fluid temperature range: -15°C~+70°C.
Viscosity range: 15~400 mm²/s. Select appropriate viscosity hydraulic fluid when operating in extreme temperature conditions.
5. Periodic Maintenance Inspection
Inspect the valve body for external oil leakage every 2,000 operating hours or at least annually.
Check electrical connectors for looseness, oxidation, or moisture ingress.
Wet-armature solenoid coils can be replaced quickly without disturbing hydraulic connections.
If response lag or unstable shifting is observed, first check system fluid cleanliness and verify the spool is not sticking.
Periodically test manual override function to ensure emergency availability.
