4WE6J63/EG24N9K4 | Rexroth Solenoid Valve 350bar 80L/min NG6

Product Overview

The 4WE6J63/EG24N9K4 is a Bosch Rexroth 4WE6 series direct-operated solenoid directional valve, NG6 (CETOP 3 / NFPA D03) size, subplate mounting, with mounting pattern conforming to ISO 4401-03-02-0-05. This 4/3-way directional valve features J spool type with direct-operated wet-armature solenoid construction. The valve body is constructed from high-strength cast iron, delivering superior rigidity and fatigue resistance.

About 4WE6 Series:

The 4WE6 series is Bosch Rexroth’s most iconic solenoid directional valve product line, widely recognized as the “gold standard” in global industrial hydraulics. The series offers multiple spool types including E, J, G, H, D, and Y, covering 3/2-way, 4/2-way, and 4/3-way configurations.

Model Code Breakdown (4WE6J63/EG24N9K4):

• 4WE: 4-way solenoid directional valve (4/3- or 4/2-way version)

• 6: Nominal Size NG6 (6 mm)

• J: Spool Type J — P blocked in neutral; A, B, and T interconnected

• 63: Design/Configuration Series (60–69 series)

• E: With wet-type solenoid

• G24: DC 24V supply (G = DC)

• N9: With manual override

• K4: Without connection box / mating connector

About Multi-Voltage Options:

The 4WE6J63 series offers complete voltage coverage:

• 12V DC (model code EG12)

• 24V DC (model code EG24)

• 110V AC (model code EW110)

• 220V AC (model code EW230)

Users can select the appropriate voltage specification based on control system power supply conditions.

Technical Specifications 

4WE6J63 Series Common Specifications:

• Brand: BOSCH REXROTH

• Series: 4WE6 Series

• Product Type: Direct Operated Solenoid Directional Valve

• Spool Configuration: 4/3-way

• Spool Type: J (P blocked in neutral; A, B, T interconnected)

• Nominal Size: NG6 (6 mm)

• Mounting Standard: ISO 4401-03-02-0-05 / CETOP 3 / NFPA D03

• Maximum Operating Pressure: 350 bar (5075 psi) 

• Maximum Flow Rate (DC): 80 L/min 

• Maximum Flow Rate (AC): 60 L/min 

• Power Consumption (DC): 30 W 

• Solenoid Type: Wet-Pin Solenoid

• Coil Rotation: 90° rotatable

• Electrical Connector: 3-pin device plug (2 + PE) per EN 175301-803 / DIN 43650

• Seal Material: NBR

• Hydraulic Fluids: HL, HLP, HLPD, HVLP, HVLPD, HFC

• Mounting Type: Subplate Mounting

• Manual Override: Equipped (concealed)

• Weight: Approx. 1.99 kg 

• Certifications: CE compliant (Low Voltage Directive 2014/35/EU)

Voltage Variants:

• 4WE6J63/EG24N9K4 (24V DC) : Voltage 24V DC

• 4WE6J63/EG12N9K4 (12V DC) : Voltage 12V DC

• 4WE6J63/EW110N9K4 (110V AC) : Voltage 110V AC

• 4WE6J63/EW230N9K4 (220V AC) : Voltage 220V AC

Key Technical Advantages

1. Direct-Operated Wet-Armature Solenoid Design for Quiet, Long-Life Operation

The 4WE6J63 series features a wet-armature solenoid directly actuating the control spool. The movable iron core operates fully submerged in hydraulic oil, providing lubrication to reduce wear and cushioning against switching impact and vibration. The solenoid coil can be rotated 90° for flexible electrical connection orientation.

2. J Spool Type — Combines Pressure Holding and Relief Functions

The J spool type (P port blocked in neutral; A, B, and T ports interconnected for pressure relief) is one of the most commonly used spool types in the 4WE6 series. In neutral position, the P port is blocked to maintain system pressure without leakage, while A and B ports are open to T for actuator pressure relief—ideal for applications requiring neutral pressure holding with free actuator movement.

3. High-Pressure High-Flow Performance in Compact NG6 Size

Delivers 350 bar peak operating pressure with 80 L/min (DC) flow capacity in a compact NG6 valve body. Optimized internal flow passages effectively minimize pressure drop, meeting the directional control requirements of diverse medium-to-high pressure industrial hydraulic systems.

4. Complete Voltage Coverage

The 4WE6J63 series offers 12V DC, 24V DC, 110V AC, and 220V AC voltage options, accommodating control system power supply conditions across global regions. Whether for low-voltage DC systems in mobile equipment or AC-powered industrial systems, a matching model is available.

5. Reliable Manual Override and IP65 Protection

Features a concealed manual override for emergency operation—in case of power failure or emergency, the spool can be manually actuated for emergency directional control. IP65 protection is achieved with properly installed connector, effectively resisting dust and water ingress.

6. International Standard Compliance for Global Interchangeability

Mounting conforms to ISO 4401-03-02-0-05 / CETOP 3 / NFPA D03 international standards. The 4WE6 series offers complete interchangeability with Parker, Eaton/Vickers, Atos, Yuken, and other major brands. CE certification ensures compliance with EU safety regulations.

7. Extended Service Life and High Reliability

The 4WE6 series has passed fatigue life and endurance testing exceeding 10 million cycles, suitable for industrial and mobile applications requiring long life and high repetitive cycle rates.

Application Areas

• Turboexpander Emergency Shutdown Systems — Safety-related emergency shutoff control

• Molecular Sieve System Switching — Hydraulic directional switching for process industries

• 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

• Compressor Hydraulic Systems — Hydraulic directional control for compressors

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

Expert Maintenance Tips

1. Installation Guidelines

• Mounting surface must conform to ISO 4401-03-02-0-05 / CETOP 3 / NFPA D03 standards.

• Use 4 M5×50 mounting bolts—refer to manufacturer specifications for tightening torque.

• Thoroughly clean the mounting surface and all ports (P, A, B, T) before installation to prevent foreign particles from entering and causing spool sticking or seal damage.

• The solenoid coil can be rotated 90°—adjust coil orientation according to wiring requirements during installation.

2. Voltage Selection Confirmation

• 4WE6J63 series offers 12V DC (EG12), 24V DC (EG24), 110V AC (EW110), and 220V AC (EW230) voltage options.

• Verify supply voltage matches coil nameplate voltage before connection.

• AC models (EW110/EW230) are suitable for 50/60Hz AC supply systems.

• DC models (EG12/EG24) are suitable for DC supply systems, offering lower power consumption and smoother switching characteristics.

3. Hydraulic Fluid Cleanliness

• Compatible fluids: HL, HLP, HLPD, HVLP, HVLPD, HFC.

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

• Seal material is NBR—for phosphate ester or other specialty fluids, select FKM seal option.

4. Electrical Connection Specifications

• Electrical connector: 3-pin device plug (2 + PE) per EN 175301-803 / DIN 43650 standard.

• Ensure the connector is fully locked to maintain IP65 protection.

• K4 suffix indicates no connection box—users must separately select a compatible mating connector.

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 the manual override function to ensure emergency availability.