DFA-03-3C60-DC24-35 | DAIKIN Solenoid Valve 35MPa 160L/min NG10

Product Overview

The DFA-03-3C60-DC24-35 and DFA-03-3C60-A220-35 are DAIKIN DFA series wet-type solenoid directional valves, G03 size (3/8 inch), with mounting pattern conforming to ISO 4401 / CETOP 5 / NG10 standards. The DFA series delivers an exceptional combination of 35 MPa (350 kgf/cm² / 5000 psi) high pressure and 160 L/min (42 GPM) high flow capacity. Constructed from high-strength cast iron, the valve body delivers superior rigidity and fatigue resistance. The product is designed to IEC IP65 dust and water-proof standards, with coil insulation rated Class H (180°C), insulation resistance exceeding 100 MΩ, and CE certification.

DFA-03-3C60-DC24-35 & DFA-03-3C60-A220-35:

Both models are 4-way, 3-position solenoid directional valves featuring spring centered configuration with 3C60 spool type. The primary difference is the supply voltage:

• DFA-03-3C60-DC24-35: DC24V supply

• DFA-03-3C60-A220-35: AC220V supply (50/60Hz)

Model Code Breakdown:

• DFA: Wet-Type Solenoid Directional Valve Series

• 03: G03 Size (NG10 / CETOP 5 / ISO 4401-05)

• 3C60: Spool Function (4-way, 3-position, spring centered, 3C60 type)

• DC24 / A220: Coil Voltage (DC24V / AC220V)

• 35: Design Number (High-pressure high-flow type, allowable back pressure 210 bar)

About DFA/DFB/DFC Series:

DFA, DFB, and DFC are sub-series within the same product family, sharing identical mounting dimensions and performance specifications—differing primarily in electrical connection methods:

• DFA Series: Hirschmann/DIN type connector

• DFB Series: Terminal box type connection

• DFC Series: Lead wire type connection

As original DAIKIN DFA series solenoid directional valves, these products offer complete interchangeability within the same series and size, requiring no modifications to mounting interfaces or piping layouts.

Technical Specifications 

DFA/B/C-03 Series Common Specifications:

• Brand: DAIKIN / DOFLUID

• Series: DFA / DFB / DFC Series

• Nominal Size: G03 (3/8 inch)

• Mounting Standard: ISO 4401 / CETOP 5 / NG10 / NFPA D05

• Mounting Type: Subplate Mounting

• Maximum Operating Pressure: 35 MPa (350 kgf/cm² / 5000 psi)

• Maximum Flow Rate: 160 L/min (42 GPM)

• Allowable Back Pressure: 210 bar (Design Number 35)

• Spool Configuration: 4-way, 3-position

• Spring Arrangement: Spring Centered

• Spool Type: 3C60

• Coil Insulation Class: Class H (180°C)

• Insulation Resistance: >100 MΩ

• Dielectric Strength: AC1500V / minute

• Protection Class: IP65

• Compatible Fluids: Petroleum-based hydraulic oil

• Operating Temperature Range: -20°C to +70°C

• Solenoid Type: Wet-Type (Oil-Immersed Armature)

• Certifications: CE Certified

DFA-03-3C60-DC24-35 Specifications:

• Model: DFA-03-3C60-DC24-35

• Coil Voltage: DC24V

• Electrical Connection: Hirschmann/DIN Type Connector

• Indicator Lamp: Not equipped (Design Number 35)

• Weight: Approx. 4.5–5.0 kg (Reference only)

DFA-03-3C60-A220-35 Specifications:

• Model: DFA-03-3C60-A220-35

• Coil Voltage: AC220V (50/60Hz)

• Electrical Connection: Hirschmann/DIN Type Connector

• Indicator Lamp: Not equipped (Design Number 35)

• Weight: Approx. 4.5–5.0 kg (Reference only)

Key Technical Advantages

1. High-Pressure High-Flow Performance

The DFA-03 series delivers an exceptional combination of 35 MPa (5000 psi) operating pressure and 160 L/min (42 GPM) flow capacity. Allowable back pressure at the tank port reaches 210 bar (Design Number 35). This performance places it at the forefront of NG10 size solenoid directional valves, making it suitable for demanding high-pressure, high-flow hydraulic systems.

2. Wet-Type (Oil-Immersed) Solenoid Design for Quiet, Long-Life Operation

The wet-type (oil-immersed) armature design features moving parts fully submerged in hydraulic oil. The hydraulic oil lubricates moving parts to reduce wear and cushions switching impact and vibration. The wet-type design ensures stable and quiet operation under high-pressure and high-frequency conditions, significantly extending valve service life.

3. Dual Return Flow Path Design — Reduced Pressure Drop and Heat Generation

The dual return flow path design substantially reduces return line pressure drop and minimizes system temperature rise. This optimization improves system efficiency and reduces operating costs.

4. Superior Electrical Insulation and Safety Performance

Coil insulation is rated Class H (180°C), with insulation resistance exceeding 100 MΩ and dielectric strength of AC1500V/minute. The product is CE certified, meeting international safety standards.

5. Low Noise and Reduced Voltage Surge Design

AC/DC coils feature reduced voltage surge characteristics, providing quieter operation and extended relay contact life. Optional surge-free coils further suppress voltage spikes to protect control systems.

6. International Standard Compliance for Global Interchangeability

Mounting conforms to ISO 4401, CETOP, DIN 24340, and NFPA international standards. Fully compatible with globally adopted NG10 size interfaces for direct replacement of same-series, same-specification products.

Application Areas

DFA-03-3C60-DC24-35 / DFA-03-3C60-A220-35 (4-way, 3-position, spring centered):

• Injection Molding Machinery — Directional control for clamping, injection, and ejection cylinders

• Hydraulic Presses and Forging Equipment — Directional control for presses and forming equipment

• CNC Machine Tools — Directional control for machine tool hydraulic systems

• Die-Casting Machines — Directional control for high-pressure casting equipment

• Construction Machinery — High-flow hydraulic directional control for excavators, loaders, and mobile equipment

• Industrial Automation Production Lines — Hydraulic actuator control for automated production lines

• Steel and Mining Equipment — Directional control for rolling mills and heavy-duty hydraulic systems

• Marine and Port Machinery — High-flow load control for winches and cranes

Expert Maintenance Tips

1. Installation Guidelines

• G03 size mounting surface must conform to ISO 4401 / CETOP 5 / NG10 / NFPA D05 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.

• Tighten mounting bolts evenly to the specified torque to ensure proper sealing between the valve body and mounting surface.

2. Hydraulic Fluid Cleanliness

• Recommended fluid: Petroleum-based hydraulic oil. For other fluid types, verify seal material compatibility.

• Install a return line filter with minimum 10 μm filtration rating upstream of the valve.

3. Electrical Connection Specifications

• DFA-03-3C60-DC24-35 uses DC24V supply. DFA-03-3C60-A220-35 uses AC220V supply (50/60Hz). Verify supply voltage matches coil rated voltage before connection.

• DFA series features Hirschmann/DIN type electrical connector. Ensure the connector is fully locked to achieve IP65 protection.

• Class H insulation (180°C) provides excellent heat resistance, but prolonged operation at extreme temperatures may shorten coil life.

4. Back Pressure Control

• Design Number 35 allows back pressure up to 210 bar. If back pressure is excessive, consider using a dedicated return line or routing the valve return port directly to the tank.

• The dual return flow path design effectively reduces return line pressure drop.

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-type 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.