SWH-G02-C4-D24-20 | Northman Solenoid Valve 210bar 250cpm IP65

Product Overview

The SWH-G02-C4-D24-20 and SWM-G02-C4-D12-30-H006 are Northman G02 series slide-type solenoid directional control valves, widely used for directional control in forklifts, construction machinery, and various industrial hydraulic systems.

SWH-G02-C4-D24-20:

The SWH-G02-C4-D24-20 is a Northman G02 series standard solenoid directional valve featuring a 4-way, 3-position spring-centered spool configuration (C4 spool type). The valve features subplate mounting with mounting pattern conforming to ISO 03 / NFPA D03 / CETOP 03 / NG6 standards. The valve body is constructed from carbon steel with a corrosion-resistant zinc phosphate compound treatment, and the coil offers IP65 protection. Designed for high-cycle applications, the valve delivers a maximum shifting frequency of 250 cycles/min.

SWM-G02-C4-D12-30-H006:

The SWM-G02-C4-D12-30-H006 is a Northman SWM series forklift-specific solenoid directional valve, engineered specifically for mobile hydraulic systems in forklift applications. Featuring the same 4-way, 3-position spring-centered spool configuration with ISO 03 / NFPA D03 / CETOP 03 / NG6 mounting pattern, the SWM series is optimized for the demanding operating conditions of forklifts and mobile equipment—maintaining stable control performance under vibration, temperature variation, and frequent shifting. The H006 suffix denotes the factory internal configuration code.

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

Model Code Breakdown:

SWH-G02-C4-D24-20:

• SWH – Slide-Type Solenoid Directional Control Valve

• G02 – G02 Series (NG6 / CETOP 3)

• C4 – Spool Type (4-way, 3-position, spring centered)

• D24 – Coil Voltage (DC 24V)

• 20 – Design Series Number (20 Series)

SWM-G02-C4-D12-30-H006:

• SWM – Slide-Type Solenoid Directional Control Valve (Mobile Equipment/Forklift Series)

• G02 – G02 Series (NG6 / CETOP 3)

• C4 – Spool Type (4-way, 3-position, spring centered)

• D12 – Coil Voltage (DC 12V)

• 30 – Design Series Number (30 Series)

• H006 – Factory Internal Configuration Code

Technical Specifications 

Common Specifications for SWH-G02-C4-D24-20 & SWM-G02-C4-D12-30-H006:

• Brand: NORTHMAN

• Valve Type: Slide-Type Solenoid Directional Control Valve

• Nominal Size: G02 (NG6)

• Mounting Standard: ISO 03 / NFPA D03 / CETOP 03 / NG6

• Spool Configuration: C4 (4-way, 3-position, spring centered)

• Maximum Operating Pressure: 210 kgf/cm² (Approx. 20.6 MPa / 3000 PSI)

• Maximum Tank Line Back Pressure: 70 kgf/cm² (Approx. 6.9 MPa / 1000 PSI)

• Maximum Frequency of Operation: 250 cycles/min

• Response Time: ≤ 50 ms (on) / ≤ 100 ms (off)

• Protection Class: IP65

• Insulation Class: Class H

• Body Material: Carbon Steel

• Corrosion Treatment: Zinc Phosphate Compound

• Compatible Hydraulic Fluids: Mineral oil, viscosity 10–400 CST

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

• Waterproof Tolerance: JIS 0203S2 (immersion in 30°C water at 100mm depth for 10 minutes)

• Vibration Tolerance: JIS D1601 Type-3 Class-D Stage-90 @ 0.4mm displacement @ 9.0G @ 67Hz × 3 directions

• Weight: Approx. 1.6 kg

SWH-G02-C4-D24-20 Specifications:

• Model: SWH-G02-C4-D24-20

• Coil Voltage: DC 24V

• Current: 1.1 A (DC 24V)

• Power Consumption: 26.4 W

• Permissible Voltage Change: -10% ~ +10% (continuous duty)

• Design Series: 20 Series

SWM-G02-C4-D12-30-H006 Specifications:

• Model: SWM-G02-C4-D12-30-H006

• Coil Voltage: DC 12V

• Current: 2.2 A (DC 12V)

• Power Consumption: 26.4 W

• Permissible Voltage Change: -10% ~ +10% (continuous duty)

• Design Series: 30 Series

• Configuration Code: H006

• Typical Application: Forklifts, loaders, excavators

Key Technical Advantages

1. High-Reliability Slide-Type Spool Design
The precision-machined slide-type spool configuration delivers excellent sealing performance and low internal leakage. The carbon steel valve body with zinc phosphate compound surface treatment provides superior corrosion resistance. The product maintains long-term stable operation in continuous heavy-duty industrial environments.

2. Excellent Response Characteristics
With response time ≤ 50 ms (on) and ≤ 100 ms (off), and maximum shifting frequency of 250 cycles/min, the valve delivers fast response ideal for high-cycle applications and hydraulic control systems requiring precise timing.

3. Rugged Environmental Durability
IP65 protection class ensures effective resistance against dust ingress and water jets from any direction. Operating temperature range covers -25°C to +90°C, suitable for diverse extreme climate conditions. The valve has passed JIS D1601 Type-3 Class-D vibration testing and JIS 0203S2 waterproof testing, ensuring reliable operation in mobile equipment vibration and moisture-prone environments.

4. Flexible Voltage Configurations with Low Power Consumption
The SWH-G02-C4-D24-20 operates on DC 24V, while the SWM-G02-C4-D12-30-H006 operates on DC 12V. Both consume only 26.4 W, delivering strong solenoid force with low power consumption. Permissible voltage fluctuation range is -10% ~ +10%.

5. Transient Voltage Suppression Protection
Optional built-in diode transient voltage suppression limits surge voltage to < 1V. Effectively protects solenoid coils and control circuits from voltage spikes, extending product service life.

6. International Standard Compliance and High Installation Compatibility
Mounting pattern conforms to ISO 03 / NFPA D03 / CETOP 03 / NG6 international standards. Fully compatible with globally adopted G02 size interfaces, enabling direct replacement of same-series, same-specification products. The G02 series manifold offers strong versatility with convenient installation and replacement.

Application Areas

• Forklift Hydraulic Systems — SWM-G02-C4-D12-30-H006 is specifically designed for forklifts, controlling mast lift/lower, tilt, and attachment functions

• Construction Machinery — Directional control for excavators, loaders, and mobile equipment

• Injection Molding Machinery — Directional switching and control for injection molding machine hydraulic systems

• CNC Machine Tools — Hydraulic directional control for actuators

• Die-Casting Machines — Directional control for high-pressure hydraulic systems

• Automated Production Lines — Hydraulic systems requiring fast fluid directional switching

• Material Handling Equipment — Directional control for lift platforms, conveyors, and handling equipment

Expert Maintenance Tips

1. Installation Guidelines

• Mounting surface must conform to ISO 03 / NFPA D03 / CETOP 03 / NG6 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 (typically M5 bolts at 6–8 N·m) to ensure proper O-ring sealing between the valve body and mounting surface.

• The G02 series manifold offers strong versatility—pay attention to alignment with locating pins during installation.

2. Hydraulic Fluid Cleanliness

• Recommended fluid cleanliness: NAS 1638 Class 12 or ISO 21/18 (or better).

• Use mineral oil with viscosity range of 10–400 CST.

• Install a return line filter with minimum 10 μm filtration rating to ensure fluid entering the valve meets cleanliness requirements.

3. Electrical Connection Specifications

• SWH-G02-C4-D24-20 uses DC 24V supply; SWM-G02-C4-D12-30-H006 uses DC 12V supply. Verify supply voltage matches coil rated voltage before connection.

• Permissible voltage fluctuation range is -10% ~ +10%. Voltage fluctuation beyond this range may affect normal valve shifting or shorten coil life.

• The built-in diode transient voltage suppression feature effectively protects the circuit. Verify correct polarity during wiring.

4. Operating Environment and Temperature Management

• Operating temperature range: -25°C to +90°C. Select appropriate viscosity hydraulic fluid when operating in extreme temperature conditions.

• IP65 protection class is achieved—ensure the electrical connector is properly locked during installation to maintain effective protection.

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.

• Inspect coil surfaces for signs of overheating (normal temperature rise should remain within allowable limits).

• If response lag or unstable shifting is observed, first check system fluid cleanliness and verify the spool is not sticking.

• Coils can be replaced without disturbing hydraulic connections.