4WE6J53/AG24NK4 | Rexroth Solenoid Valve 350bar 80L/min NG6

The 4WE6J53/AG24NK4 is a Bosch Rexroth 4WE6 series direct-operated solenoid directional valve, NG6 (CETOP 3 / NFPA D03) size, subplate mounting, with mounting surface conforming to ISO 4401-03-02-0-05. This 4/3-way solenoid directional valve features a wet-armature solenoid directly actuating the control spool. The valve body is constructed from high-strength materials, delivering superior rigidity and fatigue resistance.

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.

As an original Bosch Rexroth 4WE6 series solenoid directional valve, this product offers complete interchangeability within the same series and size, requiring no modifications to mounting interfaces or piping layouts. Bosch Rexroth’s 4WE series part numbering system has become the de facto industry standard, enabling direct interchangeability with Parker, Eaton/Vickers, Atos, Yuken, and other major brands.

Model Code Breakdown (4WE6J53/AG24NK4):

• 4WE – 4-way Solenoid Directional Valve (4/3- or 4/2-way version)

• 6 – Nominal Size NG6 (6 mm)

• J – Spool Type J (P port blocked in neutral; A, B, and T ports interconnected for pressure relief)

• 53 – Design/Configuration Series (53 Series)

• AG24 – Coil Voltage — AC/DC 24V

• NK4 – Electrical Connection and Option Code

• GU35-4-A 114 – Associated Solenoid Coil Model (Hydronorma Rexroth)

Technical Specifications 

4WE6J53/AG24NK4 Specifications:

• Model: 4WE6J53/AG24NK4

• Brand: BOSCH REXROTH / MANNESMANN REXROTH

• Series: 4WE6 Series

• Product Type: Direct Operated Solenoid Directional Valve

• Spool Configuration: 4/3-way

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

• Rated Operating Pressure: 315 bar (4570 PSI)

• Maximum Flow Rate (DC): 80 L/min

• Maximum Flow Rate (AC): 60 L/min

• Coil Voltage: 24 V DC

• Power Consumption: 26 W

• Associated Coil Model: HYDRONORMA GU35-4-A 114

• Body Material: High-strength material

• Hydraulic Connection: Sub-plate Mounting

• Ambient Temperature Range: -20°C to +50°C

• Fluid Temperature Range: -30°C to +80°C

• Viscosity Range: 10 to 500 mm²/s

• Recommended Cleanliness: ISO 4406 18/16/13 or better

• Minimum Cleanliness: ISO 4406 20/18/15

• Mounting Bolts: M5 × 45 mm (4 bolts)

• Tightening Torque: 6 N·m

• Weight: Approx. 1.6–1.8 kg

Key Technical Advantages

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

The 4WE6J53/AG24NK4 features a wet-armature solenoid directly actuating the control spool. Internal moving parts operate fully submerged in hydraulic fluid, providing a cushioning effect that ensures smooth, quiet operation even under high-pressure, high-frequency switching. 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, such as hydraulic cylinder floating positioning.

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. International Standard Compliance for Global Interchangeability

Mounting conforms to ISO 4401-03-02-0-05 / CETOP 3 / NFPA D03 international standards. Bosch Rexroth’s 4WE series part numbering system has become the de facto industry standard, enabling direct interchangeability with Parker, Eaton/Vickers, Atos, Yuken, and other major brands.

5. Reliable Manual Override

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, ensuring system safety.

6. 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.

7. Flexible Voltage and Configuration Options

Supports multiple voltage options including DC 12V, 24V and AC 110V, 230V. A wide range of spool types (E, J, G, H, D, Y, etc.) and electrical connection options cover the majority of industrial application requirements.

Application Areas

• 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 — Hydraulic directional control for excavators, loaders, and mobile equipment

• Industrial Automation Systems — Hydraulic actuator control for automated production lines

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

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

Expert Maintenance Tips

1. Installation Guidelines

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

• Use 4 M5×45 mounting bolts with recommended tightening torque of 6 N·m.

• 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.

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

2. Hydraulic Fluid Cleanliness

• Recommended fluid cleanliness: ISO 4406 18/16/13 or better.

• Minimum cleanliness requirement: ISO 4406 20/18/15.

• Use mineral oil with viscosity range of 10–500 mm²/s.

• Install a return line filter with minimum 10 μm filtration rating.

3. Electrical Connection Specifications

• 4WE6J53/AG24NK4 uses DC 24V supply with 26 W power consumption.

• Verify supply voltage matches coil rated voltage before connection.

• Ensure the electrical connector is properly installed and locked to prevent contact issues caused by vibration.

4. Operating Environment and Temperature Management

• Ambient temperature range: -20°C to +50°C.

• Fluid temperature range: -30°C to +80°C.

• Select appropriate viscosity hydraulic fluid when operating in extreme temperature conditions.

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.