4WE10D3X 4WE6G6X 4WE10E 4WE10J Rexroth Solenoid Valve 350 bar

Product Overview

The Bosch Rexroth 4WE series solenoid-operated directional valves — covering 4WE10D3X/CG24N9K4, 4WE10E, 4WE10J, 4WE10H (NG10 / CETOP 05 / Size 10) and 4WE6G6X/EG24N9K4, 4WE6D, 4WE6H (NG6 / CETOP 03 / Size 6) — represent the global benchmark in hydraulic directional control technology. These direct-acting solenoid spool valves are widely deployed across industrial hydraulic systems and mobile equipment.

Type WE directional valves consist of a housing, one or two solenoids, a control spool, and return springs. In the de-energized condition, the control spool is held in the central or initial position by the return springs. When the wet-pin solenoid is energized, the control spool moves to the required end position, releasing the corresponding flow direction according to the selected spool symbol. After the solenoid is de-energized, the control spool returns to its central or initial position.

The 4WE10 series features NG10 (CETOP 05) mounting interfaces, strictly conforming to ISO 4401-05-04-0-05, DIN 24340 Form A, and NFPA T3.5.1 R2 D05 standards. The 4WE6 series features NG6 (CETOP 03) interfaces compliant with ISO 4401-03-02-0-05, DIN 24340-A6, and CETOP R 35 H-03 standards. All models are equipped with wet-pin AC or DC solenoids with detachable coils that can be rotated 90° to accommodate tight installation spaces. Concealed manual override (N9 designation) is standard across all models, enabling manual valve shifting during power failure.

Interchangeability Note: All models strictly conform to international standard mounting interface dimensions (ISO 4401 / DIN 24340), enabling seamless drop-in replacement for original Rexroth valves on identical mounting surfaces. Every unit undergoes 100% simulated in-service testing to ensure it meets design performance targets immediately upon installation.

Technical Specifications (Bulleted List)

4WE10D3X/CG24N9K4 (NG10 / Size 10)

• Brand / Series: Bosch Rexroth 4WE10

• Valve Type: 4/2-way solenoid-operated directional valve

• Mounting Interface Size: NG10 (CETOP 05 / NFPA D05)

• Mounting Interface Standards: ISO 4401-05-04-0-05, NFPA T3.5.1 R2-2002 D05

• Component Series: 3X (30-39 series)

• Max. Operating Pressure (P, A, B ports): 315 bar (4,569 psi)

• Max. Flow Rate: 120 L/min (32 GPM)

• Hydraulic Fluid Temperature Range: -20°C to +80°C

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

• Spool Type: 4/2-way, single solenoid, mechanical spring return

• Actuation: Wet-pin solenoid with detachable coil

• Solenoid Voltage: DC 24V

• Solenoid Hold Current: 2A

• Electrical Connection: 3-pin DIN connector (43650)

• Seal Material: FKM

• Manual Override: Concealed

• Throttle Insert: Ø2mm (0.079″) at port P

• Enclosure Rating: IP65

• Weight: Approx. 5.5 kg

• Circuit Diagram: D

4WE10E (NG10 / Size 10)

• Brand / Series: Bosch Rexroth 4WE10

• Valve Type: 4/3-way solenoid-operated directional valve

• Mounting Interface Size: NG10 (CETOP 05 / NFPA D05)

• Mounting Interface Standards: ISO 4401-05-04-0-05, DIN 24340 Form A

• Component Series: 3X

• Max. Operating Pressure: 350 bar

• Max. Flow Rate: 120 L/min

• Spool Configuration (Neutral): E spool — P blocked, A and B connected to T

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

• Actuation: Wet-pin solenoid with detachable coil

• Solenoid Voltage: DC 24V (CG24) or AC 230V

• Electrical Connection: DIN EN 175301-803 standard connector

• Seal Material: NBR (standard) / FKM (optional)

• Ambient Temperature Range: -20°C to +70°C

• Fluid Temperature Range: -20°C to +80°C

• Viscosity Range: 2.8 – 500 mm²/s

• Recommended Fluid Cleanliness: ISO 4406 Class 20/18/15

• Enclosure Rating: IP65

• Weight (two solenoids): Approx. 5.5 kg

4WE10J (NG10 / Size 10)

• Brand / Series: Bosch Rexroth 4WE10

• Valve Type: 4/3-way solenoid-operated directional valve

• Mounting Interface Size: NG10 (CETOP 05 / NFPA D05)

• Mounting Interface Standards: ISO 4401-05-04-0-05, DIN 24340 Form A

• Component Series: 3X

• Max. Operating Pressure (P, A, B ports): 315 bar

• Max. Tank Line Pressure (T port): 160 bar

• Max. Flow Rate: 120 L/min

• Spool Configuration (Neutral): J spool — P blocked, A and B connected to T (optimized)

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

• Actuation: Wet-pin solenoid with detachable coil

• Solenoid Voltage: DC 24V (CG24)

• Electrical Connection: DIN EN 175301-803 standard connector

• Manual Override: Concealed (standard)

• Seal Material: NBR (standard) / FKM (optional)

• Ambient Temperature Range: -20°C to +80°C

• Viscosity Range: 2.8 – 500 mm²/s

• Recommended Fluid Cleanliness: ISO 4406 Class 20/18/15

• Enclosure Rating: IP65

• Switching Time (off): 50 ms

• Weight (two solenoids): Approx. 5.5 kg

4WE10H (NG10 / Size 10)

• Brand / Series: Bosch Rexroth 4WE10

• Valve Type: 4/3-way solenoid-operated directional valve

• Mounting Interface Size: NG10 (CETOP 05 / NFPA D05)

• Mounting Interface Standards: ISO 4401-05-04-0-05

• Component Series: 3X

• Max. Operating Pressure: 315 bar

• Max. Flow Rate: 120 L/min

• Spool Configuration (Neutral): H spool — P, A, B, T all open (fully open center)

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

• Actuation: Wet-pin solenoid

• Solenoid Voltage: DC 24V

• Electrical Connection: DIN 3-pin connector

• Manual Override: Standard

• Seal Material: NBR

• Ambient Temperature Range: -20°C to +80°C

• Viscosity Range: 2.8 – 500 mm²/s

• Recommended Fluid Cleanliness: ISO 4406 Class 20/18/15

• Enclosure Rating: IP65

• Weight (two solenoids): Approx. 5.5 kg

4WE6G6X/EG24N9K4 (NG6 / Size 6)

• Brand / Series: Bosch Rexroth 4WE6

• Valve Type: 4/3-way solenoid-operated directional valve

• Mounting Interface Size: NG6 (CETOP 03 / NFPA D03)

• Mounting Interface Standards: ISO 4401-03-02-0-05, DIN 24340-A6, CETOP R 35 H-03, NFPA-D03

• Component Series: 6X (60-69 series)

• Max. Operating Pressure: 350 bar

• Max. Flow Rate (DC): 80 L/min

• Max. Flow Rate (AC): 60 L/min

• Spool Configuration (Neutral): G spool

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

• Actuation: Wet-pin solenoid

• Solenoid Voltage: DC 24V (EG24)

• Solenoid Power: 30 W (DC)

• Electrical Connection: DIN EN 175301-803 standard connector (ST 03)

• Manual Override: Standard

• Housing Material: Spheroidal cast iron

• Internal Parts Material: Steel

• Seal Material: NBR

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

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

• Viscosity Range: 2.8 – 500 mm²/s

• Voltage Tolerance: ±10%

• Recommended Fluid Cleanliness: ISO 4406 Class 20/18/15

• Enclosure Rating: IP65

• Mounting Bolts: 4 × M5×50, strength class 12.9

• Weight: Approx. 2.0 kg

4WE6D (NG6 / Size 6)

• Brand / Series: Bosch Rexroth 4WE6

• Valve Type: 4/3-way solenoid-operated directional valve

• Mounting Interface Size: NG6 (CETOP 03 / NFPA D03)

• Mounting Interface Standards: ISO 4401-03-02-0-05

• Component Series: 6X

• Max. Operating Pressure: 350 bar

• Max. Flow Rate (DC): 80 L/min

• Max. Flow Rate (AC): 60 L/min

• Spool Configuration (Neutral): D spool — P→A, B→T open

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

• Actuation: Wet-pin solenoid

• Solenoid Voltage: DC 24V (EG24)

• Electrical Connection: DIN EN 175301-803 standard connector

• Seal Material: NBR

• Ambient Temperature Range: -20°C to +70°C

• Viscosity Range: 2.8 – 500 mm²/s

• Enclosure Rating: IP65

• Weight (one solenoid): 1.45 kg

• Weight (two solenoids): 1.95 kg

4WE6H (NG6 / Size 6)

• Brand / Series: Bosch Rexroth 4WE6

• Valve Type: 4/3-way solenoid-operated directional valve

• Mounting Interface Size: NG6 (CETOP 03 / NFPA D03)

• Mounting Interface Standards: ISO 4401-03-02-0-05

• Component Series: 6X

• Max. Operating Pressure: 350 bar

• Max. Flow Rate (DC): 80 L/min

• Max. Flow Rate (AC): 60 L/min

• Spool Configuration (Neutral): H spool — P, A, B, T all open

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

• Actuation: Wet-pin solenoid

• Solenoid Voltage: DC 24V

• Electrical Connection: DIN EN 175301-803 standard connector

• Seal Material: NBR

• Ambient Temperature Range: -20°C to +70°C

• Viscosity Range: 2.8 – 500 mm²/s

• Enclosure Rating: IP65

• Weight (two solenoids): Approx. 1.95 kg

Key Technical Advantages

1. Wet-Pin Solenoid Technology – Low Noise & Extended Service Life
The 4WE series employs wet-pin solenoid design throughout, where the solenoid plunger operates directly within the hydraulic fluid. This delivers three core benefits: ① Fluid continuously dissipates heat generated by the solenoid, ensuring low temperature rise and extended coil life; ② The plunger benefits from fluid lubrication and damping, resulting in reduced shifting shock and low noise; ③ No dynamic seals between the solenoid and valve body, eliminating external leakage risks.

2. 90° Rotatable Coils – Flexible Installation
Solenoid coils are detachable and can be replaced without opening the pressure-tight chamber. Coils can be rotated 90° during installation, greatly facilitating layout and maintenance in confined or complex installation spaces.

3. Multiple Spool Configurations – Versatile System Integration
The spool configurations covered address the most commonly required neutral position functions in hydraulic systems:

• D spool (P→A, B→T): Standard actuator control, the most common 4WE6 configuration

• E spool (P blocked, A/B to T): Ideal for actuator floating or unloading circuits

• G spool (P→A, B→T): Suited for specific actuator motion requirements

• H spool (P/A/B/T all open): Ideal for fully unloading the system in neutral

• J spool (P blocked, A/B to T, optimized): Similar to E with optimized flow characteristics

• D3X (4/2-way, single solenoid): Suited for two-position directional applications

4. Internationally Standardized Mounting – Global Compatibility
The 4WE10 series mounting interface strictly conforms to ISO 4401-05-04-0-05, DIN 24340 Form A, and NFPA T3.5.1 R2 D05 international standards; the 4WE6 series conforms to ISO 4401-03-02-0-05, DIN 24340-A6, and CETOP R 35 H-03 standards, enabling seamless integration with the vast majority of NG10/NG6 hydraulic systems worldwide — true drop-in interchangeability.

5. Standard Manual Override – Hassle-Free Commissioning
All models feature a standard concealed manual override (N9 / N designation), allowing manual spool shifting during power loss or control system failure. This feature proves invaluable during system commissioning, emergency operations, and maintenance.

6. High-Power Solenoids & Fast Response
The 4WE series is equipped with high-power wet-pin solenoids. The 4WE10J series achieves a switching time (off) of just 50 ms, meeting the demanding requirements of high-speed automation equipment. Optimized solenoid design ensures fast, reliable shifting response.

Application Areas

General Application Fields: Injection molding machinery, presses and forging equipment, construction and mobile hydraulics, machine tools and automated production lines, metallurgical equipment, test benches and laboratory equipment, marine hydraulic systems, wind turbine hydraulic systems, material handling equipment.

Expert Maintenance Tips

1. Mounting Surface Verification & Port Identification
Before installation, verify that the system subplate conforms to ISO 4401 and DIN 24340 standards. Standard port designation: P (pressure), T (tank), A / B (working ports). Tighten mounting bolts to manufacturer-recommended torque (4WE10 series: typically M6 × 40-45, torque 8-10 Nm; 4WE6 series: M5 × 50, torque 20-25 Nm, strength class 12.9) to avoid housing distortion that could cause spool sticking.

2. Fluid Cleanliness Management
The 4WE series employs spool-type construction with extremely tight clearances between the spool and housing (typically 3-5 μm). A minimum fluid cleanliness level of ISO 4406 Class 20/18/15 is recommended to prevent contaminant particles from causing spool sticking. Install return-line filters with filtration rating ≤ 10 μm upstream of the valve.

3. Electrical Connection Practices
Electrical connections use DIN EN 175301-803 standard connectors. Always verify that the supply voltage matches the solenoid rated voltage (4WE10 series CG24 = DC 24V; 4WE6 series EG24 = DC 24V). Voltage tolerance is ±10%. Connectors with indicator lights (e.g., K4 designation) are recommended for quick visual diagnosis of solenoid energization status.

4. Manual Override Usage
The concealed manual override (N9 designation) is actuated via a push pin. Always perform manual override tests with the system fully depressurized. The manual override is intended for emergency and commissioning purposes only — not for continuous shifting operations.

5. Seal Material Selection
4WE10D3X/CG24N9K4/B20V is equipped with FKM seals as standard, compatible with a wide range of hydraulic fluids including HL, HLP, HLPD, HVLP, HVLPD, HETG, HEES, HEPG, HFDU, and HFDR. Standard NBR seals are suitable for mineral oil-based hydraulic fluids. Confirm seal material compatibility with the actual hydraulic fluid type before selection.

6. Periodic Maintenance & Inspection
A comprehensive inspection of 4WE series valves is recommended every 12 months or 2,000 operating hours (whichever comes first): ① Measure solenoid coil resistance and insulation performance; ② Verify smooth spool movement (via manual override test); ③ Check mounting bolts for loosening; ④ Inspect electrical connectors for reliable connection, oxidation, or corrosion; ⑤ Inspect seals for aging or leakage.