KSO-G02-2BP-30-E-2T | DAIKIN Solenoid Valve 35MPa 100L/min IP65

Product Overview

The KSO series is a solenoid pilot-operated directional control valve developed by DAIKIN, available in G02 (1/4 inch) and G03 (3/8 inch) nominal sizes. The series achieves an exceptional combination of 35 MPa (350 kgf/cm²) high-pressure operation and high flow rates—100 L/min for G02 and 160 L/min for G03. Constructed from high-strength cast iron, the valve body delivers superior rigidity and fatigue resistance. Designed to IEC Pub529 IP65 dust and water-proof standards and compliant with European CE safety regulations, this series is suitable for demanding industrial environments worldwide.

As original DAIKIN KSO series hydraulic solenoid valves, these products offer complete interchangeability within the same size (G02 or G03), requiring no modifications to mounting interfaces or piping layouts. Both G02 and G03 series support modular stack valve configurations for flexible integration into diverse hydraulic systems.

Model Code Breakdown (using KSO-G02-2BP-30-E-2T as an example):

• KSO – Solenoid Pilot-Operated Directional Control Valve Series

• G02 – Nominal Size (G02 = 1/4 inch, G03 = 3/8 inch)

• 2BP – Spool/Spring Configuration (4-way, 2-position, spring return, solenoid operated)

• 30 – Design Number

• E – Voltage Code (DC24V)

• 2T – Option Code (Terminal box type with indicator lamp)

Technical Specifications 

KSO-G02 Series General Specifications 

• Nominal Size: 1/4 inch

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

• Maximum Flow Rate: 100 L/min

• Allowable Back Pressure: 17.5 MPa (175 kgf/cm²)

• Maximum Shifting Frequency: 240 cycles/min

• Connection Type: Gasket Mount

• Protection Class: IEC Pub529 IP65 (Dust and Water-Proof)

• Compatible Fluids: Petroleum-based hydraulic oil

• Insulation Class: Class B (Coil: Class H)

• Dielectric Strength: AC1500V for 1 minute

• Insulation Resistance: 50 MΩ minimum

• Mounting Bolts: M5×45

• Tightening Torque: 6.5–8.5 N·m (65–85 kgf·cm)

KSO-G03 Series General Specifications 

• Nominal Size: 3/8 inch

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

• Maximum Flow Rate: 160 L/min (DC) / 130 L/min (AC)

• Allowable Back Pressure: 16 MPa (160 kgf/cm²)

• Maximum Shifting Frequency: 240 cycles/min

• Connection Type: Gasket Mount

• Protection Class: IEC Pub529 IP65 (Dust and Water-Proof)

• Compatible Fluids: Petroleum-based hydraulic oil

• Insulation Class: Class B (Coil: Class H)

• Dielectric Strength: AC1500V for 1 minute

• Insulation Resistance: 50 MΩ minimum

• Mounting Bolts: M6×35

• Tightening Torque: 12–15 N·m

Model-Specific Specifications

KSO-G02-2BP-30-E-2T:

• Model: KSO-G02-2BP-30-E-2T

• Spool Configuration: 2BP (4-way, 2-position, spring return, solenoid operated)

• Design Number: 30

• Voltage Code: E (DC24V)

• Holding Current: 1.22 A

• Holding Power: 29.2 W

• Permissible Voltage Fluctuation: 90–110%

• Option Code: 2T (Terminal box type with indicator lamp)

• Weight: Approx. 1.7–2.2 kg

KSO-G03-2BP-20-P-194:

• Model: KSO-G03-2BP-20-P-194

• Spool Configuration: 2BP (4-way, 2-position, spring return, solenoid operated)

• Design Number: 20

• Voltage Code: P (DC24V)

• Option Code: 194 (Factory internal configuration code)

• Weight: Approx. 4.4 kg

KSO-G02-2NP-30-E:

• Model: KSO-G02-2NP-30-E

• Spool Configuration: 2NP (4-way, 2-position, no-spring type, without detent)

• Design Number: 30

• Voltage Code: E (DC24V)

• Holding Current: 1.22 A

• Holding Power: 29.2 W

• Permissible Voltage Fluctuation: 90–110%

• Wiring Method: Terminal box type with indicator lamp, ground terminal

• Weight: Approx. 2.2 kg

KSO-G03-20BA-20-8:

• Model: KSO-G03-20BA-20-8

• Spool Configuration: 20BA (3-way, 2-position, spring offset type with SOL.b)

• Design Number: 20

• Voltage Code: 8 (AC100V, 50/60Hz)

• Starting Current: 5.7 A (50Hz) / 4.9 A (60Hz)

• Holding Power: 37 W (50Hz) / 33 W (60Hz)

• Permissible Voltage Fluctuation: 80–110% (50Hz) / 90–121% (60Hz)

• Shifting Time (Energized): 0.005–0.025 sec

• Shifting Time (Spring Return): 0.005–0.03 sec

• Weight: Approx. 3.7 kg

Key Technical Advantages

1. High-Pressure High-Flow Performance
The KSO series delivers an exceptional combination of 35 MPa operating pressure and flow rates of 100 L/min (G02) and 160 L/min (G03). This performance places it at the forefront of solenoid directional control valves in its class, making it suitable for demanding high-pressure, high-flow hydraulic systems. Note: Certain KSO-G02 spool configurations have a reduced maximum operating pressure of 25 MPa—verify the complete model code for the specific pressure rating.

2. Rugged Environmental Protection
Designed to IEC Pub529 IP65 standards, the valve features dust-tight construction and protection against water jets from any direction. CE compliance makes it suitable for export to European markets and equipment requiring CE certification.

3. High-Reliability Solenoid System
The solenoid coil utilizes Class H insulation material for excellent heat resistance. Under DC24V supply (E/P voltage codes), holding current is only 1.22 A with 29.2 W holding power, and the valve accommodates 90–110% voltage fluctuation. The solenoid supports continuous duty rating.

4. Precision Machining and Long Service Life
The valve body is manufactured from high-strength cast iron, with spool and bore surfaces precision-ground to ensure minimal internal leakage and long-term shifting accuracy. With a maximum shifting frequency of 240 cycles/min, the valve is ideal for high-cycle applications.

5. Flexible Installation Options
Multiple solenoid connection configurations are available (terminal box type, direct lead type, etc.), with optional indicator lamps. Both G02 and G03 series support modular stack valve configurations for flexible integration into diverse hydraulic systems. The design prioritizes installation convenience and maintenance visibility across diverse operating conditions.

Application Areas

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

• Die-Casting and Forging Equipment — Directional switching in high-pressure, high-flow hydraulic systems

• Construction Machinery Hydraulics — Pilot control and main valve control for excavators, loaders, and mobile equipment

• Machine Tool Hydraulics — Hydraulic directional control for CNC machines and machining centers

• Metallurgical and Mining Equipment — Directional control for rolling mills, crushers, and heavy-duty machinery

• Marine and Port Machinery — Hydraulic control for steering gears, winches, and cranes

Expert Maintenance Tips

1. Installation Guidelines

• G02 size: Use 4 M5×45 mounting bolts with recommended tightening torque of 6.5–8.5 N·m (65–85 kgf·cm). G03 size: Use M6×35 mounting bolts with recommended tightening torque of 12–15 N·m.

• Thoroughly clean the mounting surface and ports before installation to prevent foreign particles from entering the valve and causing spool sticking or seal damage.

2. Hydraulic Fluid Cleanliness

• Recommended fluid: Petroleum-based hydraulic oil. For phosphate ester or water-glycol fluids, select models with appropriate seal materials.

• Install a return line filter with minimum 25 μm filtration rating upstream of the valve.

3. Electrical Connection Specifications

• For DC24V supply (E/P voltage codes), ensure voltage fluctuation remains within 90–110% of rated value (21.6V–26.4V). For AC100V supply (KSO-G03-20BA-20-8), verify voltage fluctuation is within allowable range (50Hz: 80–110%, 60Hz: 90–121%).

• Solenoid coil polarity is not specified, but follow standard wiring diagrams to ensure proper indicator lamp function.

4. Back Pressure Control

• G02 size: System return line back pressure must not exceed 17.5 MPa (175 kgf/cm²). G03 size: Must not exceed 16 MPa (160 kgf/cm²). If back pressure is excessive, consider using a dedicated return line or routing the valve return port directly to the tank.

5. Periodic Maintenance Inspection

• Inspect solenoid coil insulation resistance (should be ≥50 MΩ) every 2,000 operating hours or at least annually.

• Check for external oil leakage and inspect terminal connections for looseness or oxidation.