SWH-G02-B2-D24-20-LS | Yuken Solenoid Valve 31.5MPa 63L/min DC24V

Product Overview

The SWH-G02-B2-D24-20-LS, SWH-G02-C8S-D24-20-LS, SWH-G02-C7-A110-20-LS, and SWH-G02-C5-D24-10 are wet-type solenoid-operated directional control valves from the Yuken SWH-G02 Series. Featuring a wet-type solenoid design—where the movable iron core operates in hydraulic fluid for lubrication and cushioning—this series delivers exceptional wear resistance and extended service life. The valve body features a 6mm port size (G02规格) and complies with industry-standard mounting interfaces.

The G02 Series is equipped with high-force wet-type solenoids and features an optimized oil passage design, capable of operating under high pressure (315 kgf/cm² / 31.5 MPa) and high flow (63 L/min) conditions. Coils are Class H insulated with insulation resistance exceeding 100MΩ and temperature resistance up to 180°C.

Every unit supplied undergoes 100% simulated real-world condition testing to guarantee reliable performance under rated pressure and flow. The product line carries CE (Europe) safety approvals.

Technical Specifications 

Model: SWH-G02-B2-D24-20-LS

• Series: Yuken SWH-G02 Series

• Valve Size: G02 (6mm port size)

• Spool Type: B2 (2-position, 4-way, spring return, solenoid a side)

• Max. Working Pressure (P, A, B ports): 31.5 MPa (315 kgf/cm²)

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

• Max. Flow Rate: 63 L/min

• Solenoid Type: DC wet-type

• Supply Voltage: DC24V

• Power Consumption: 28.8W

• Current Draw: 1.3A (DC24V)

• Allowable Voltage Range: Rated voltage ±10%

• Withstand Voltage: 1500V/sec

• Insulation Resistance: 100MΩ min.

• Insulation Class: Class H

• Protection Class: IP 67 equivalent

• Max. Switching Frequency: 250 cycles/min

• Switching Time: ON within 50ms, OFF within 100ms

• Operating Temperature Range: -25°C ~ +90°C

• Viscosity Range: 10 ~ 1000 cSt

• Max. Ambient Temperature: 50°C

• Design Number: 20

• Special Feature: LS (Low Shock)

• Weight: Approx. 1.5 kg (single solenoid)

• Mounting Bolts: M5 × 45L, 4 pcs, torque 70~80 kgf·cm

• Cleanliness Requirement: NAS Class 12 or better

• Certifications: CE

Model: SWH-G02-C8S-D24-20-LS

• Series: Yuken SWH-G02 Series

• Valve Size: G02 (6mm port size)

• Spool Type: C8S (3-position, 4-way, spring centered, special center condition)

• Max. Working Pressure (P, A, B ports): 31.5 MPa (315 kgf/cm²)

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

• Max. Flow Rate: 63 L/min

• Solenoid Type: DC wet-type

• Supply Voltage: DC24V

• Power Consumption: 28.8W

• Current Draw: 1.3A (DC24V)

• Allowable Voltage Range: Rated voltage ±10%

• Withstand Voltage: 1500V/sec

• Insulation Resistance: 100MΩ min.

• Insulation Class: Class H

• Protection Class: IP 67 equivalent

• Max. Switching Frequency: 250 cycles/min

• Switching Time: ON within 50ms, OFF within 100ms

• Operating Temperature Range: -25°C ~ +90°C

• Viscosity Range: 10 ~ 1000 cSt

• Max. Ambient Temperature: 50°C

• Design Number: 20

• Special Feature: LS (Low Shock)

• Weight: Approx. 2.0 kg (dual solenoid)

• Mounting Bolts: M5 × 45L, 4 pcs, torque 70~80 kgf·cm

• Cleanliness Requirement: NAS Class 12 or better

• Certifications: CE

Model: SWH-G02-C7-A110-20-LS

• Series: Yuken SWH-G02 Series

• Valve Size: G02 (6mm port size)

• Spool Type: C7 (3-position, 4-way, spring centered)

• Max. Working Pressure (P, A, B ports): 31.5 MPa (315 kgf/cm²)

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

• Max. Flow Rate: 63 L/min

• Solenoid Type: AC wet-type

• Supply Voltage: AC110V (50/60Hz)

• Allowable Voltage Range: -15% ~ +10% of rated voltage

• Insulation Class: Class H

• Protection Class: IP 67 equivalent

• Max. Switching Frequency: 250 cycles/min

• Switching Time: ON within 50ms, OFF within 100ms

• Operating Temperature Range: -25°C ~ +90°C

• Viscosity Range: 10 ~ 1000 cSt

• Max. Ambient Temperature: 50°C

• Design Number: 20

• Special Feature: LS (Low Shock)

• Weight: Approx. 2.0 kg (dual solenoid)

• Mounting Bolts: M5 × 45L, 4 pcs, torque 70~80 kgf·cm

• Cleanliness Requirement: NAS Class 12 or better

• Certifications: CE

Model: SWH-G02-C5-D24-10

• Series: Yuken SWH-G02 Series

• Valve Size: G02 (6mm port size)

• Spool Type: C5 (3-position, 4-way, spring centered)

• Max. Working Pressure (P, A, B ports): 31.5 MPa (315 kgf/cm²)

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

• Max. Flow Rate: 63 L/min

• Solenoid Type: DC wet-type

• Supply Voltage: DC24V

• Power Consumption: 28.8W

• Current Draw: 1.3A (DC24V)

• Allowable Voltage Range: Rated voltage ±10%

• Withstand Voltage: 1500V/sec

• Insulation Resistance: 100MΩ min.

• Insulation Class: Class H

• Protection Class: IP 67 equivalent

• Max. Switching Frequency: 250 cycles/min

• Switching Time: ON within 50ms, OFF within 100ms

• Operating Temperature Range: -25°C ~ +90°C

• Viscosity Range: 10 ~ 1000 cSt

• Max. Ambient Temperature: 50°C

• Design Number: 10

• Weight: Approx. 2.0 kg (dual solenoid)

• Mounting Bolts: M5 × 45L, 4 pcs, torque 70~80 kgf·cm

• Cleanliness Requirement: NAS Class 12 or better

• Certifications: CE

Key Technical Advantages

1. Wet-Type Solenoid Design – Extended Service Life & Silent Operation

The wet-type solenoid design immerses the movable iron core in hydraulic fluid, which simultaneously provides lubrication and cushioning. Compared to conventional dry-type solenoids, this design drastically reduces wear, extending service life significantly while delivering exceptionally low switching noise.

2. High-Hardness Precision-Machined Spool – Wear-Resistant & Reliable

The spool is manufactured from high-hardness material exceeding 60HRC, precision-machined on high-precision CNC lathes with tight dimensional control for consistent, reliable quality. Exceptional wear resistance under high-frequency operation ensures stable, reliable performance under high-pressure conditions and extended service life in medium-to-low pressure applications.

3. Optimized Flow Passage Design – Reduced Temperature Rise & Enhanced Efficiency

The internally optimized flow passage design ensures smooth flow under high-flow conditions, effectively reducing hydraulic fluid temperature rise. This design significantly mitigates issues caused by elevated oil temperatures, including fluid degradation and reduced machine efficiency.

4. Class H Insulation & IP67 Protection – Safe & Durable

Coils feature Class H insulation (temperature resistance up to 180°C) with insulation resistance exceeding 100MΩ. The protection class meets IP 67 equivalent standards, delivering excellent water and dust resistance. The product line carries CE certification, meeting international safety standards.

5. Low Shock (LS) Function – System Protection & Smooth Operation

Models with the LS suffix feature a low-shock function that optimizes solenoid energization and de-energization switching characteristics. This effectively suppresses hydraulic shock, protecting system piping and actuators while extending the overall service life of the hydraulic system.

Application Areas

• Injection Molding Machines – Clamping, ejection, and injection directional control

• Die-Casting Machines – High-pressure casting hydraulic system directional control

• Metal Forming Equipment – Presses, bending machines, shears

• Construction & Mobile Machinery – Excavators, wheel loaders hydraulic systems

• Machine Tool Hydraulics – Machining centers, CNC equipment auxiliary functions

• Packaging Machinery – Automated packaging equipment hydraulic drive systems

• Custom Test Circuits – Hydraulic test benches and custom hydraulic systems

Expert Maintenance Tips

Installation Guidelines:

1. Fluid Cleanliness Control – Maintain system fluid cleanliness at NAS 1638 Class 12 or better to protect spool-to-body clearances and prevent sticking failures. Media containing particulate contaminants must be filtered prior to use.

2. Mounting Surface Preparation – Thoroughly clean the valve base and manifold mounting surface before installation. Tighten the 4 M5×45L mounting bolts in a cross pattern using a torque wrench; recommended torque is 70–80 kgf·cm.

3. T-Port Back Pressure Limitation – Maximum allowable T-port back pressure is 16 MPa (160 kgf/cm²). Exceeding this limit may impair shifting performance. Consider a dedicated return line for high-back-pressure systems.

4. Voltage Verification – D24 type requires DC24V with allowable range of ±10% (21.6–26.4V); A110 type requires AC110V with allowable range of -15% to +10%. Confirm supply voltage is within specified range—over-voltage will burn out the coil, while under-voltage will cause unreliable shifting.

5. LS Model Special Note – Models with the LS suffix feature Low Shock functionality. No special installation treatment is required, but it is recommended to verify switching characteristics during system commissioning.

Routine Maintenance:

• Periodically inspect coil terminal connections and verify indicator lights are functioning

• Check spool shifting smoothness every 2,000 operating hours or per equipment maintenance schedule

• Always disconnect power before coil replacement and verify new coil matches the original specification (pay special attention to DC24V vs. AC110V differentiation)

• If shifting delay or abnormal noise is observed, first inspect fluid cleanliness and system pressure