4WE6J50/AW11050NZ4 Rexroth Solenoid Valve 350 Bar

Product Overview

The Bosch Rexroth 4WE6J50/AW11050NZ4 and 4WE6L50/AW11050NZ4 belong to the WE6 family of direct-operated solenoid directional spool valves for industrial hydraulic flow-direction control.

Bosch Rexroth identifies the WE6 as an electric direct-operated directional valve, Size 6, with standardized subplate mounting according to ISO 4401-03-02-0-05. The family supports 3/2-, 4/2- and 4/3-way configurations and multiple spool symbols.

The supplied product strings represent older WE6 ordering conventions. Public historical records contain closely related configurations such as 4WE6J51/AW110-50NZ4 and 4WE6J53/AW110-50NZ4, confirming the AW110-50 electrical configuration within the historical WE6 product family. However, the exact complete strings supplied here are not directly indexed in the current Bosch Rexroth public configurator, so unsupported material numbers or exact weights are not stated.

The configuration can be understood at the family level as:

• 4WE6: 4-way WE valve, Size 6 / NG6
• J50: J50 spool configuration
• L50: L50 spool configuration
• AW110-50: 110 VAC, 50 Hz solenoid arrangement
• NZ4: historical Rexroth electrical connection designation

J50 and L50 must not be treated as interchangeable spool functions. The spool symbol determines the hydraulic connection logic between P, T, A and B and therefore must be matched to the original machine circuit.

For the WE6 family, the maximum operating pressure is 350 bar. Rexroth specifies maximum flow of 80 L/min for DC versions and 60 L/min for AC versions. Since the supplied models use the AW110 AC configuration, the appropriate series-level reference is 60 L/min rather than the 80 L/min DC figure.

Technical Specifications

4WE6J50/AW11050NZ4

• Manufacturer: Bosch Rexroth
• Valve Type: Direct-operated solenoid directional spool valve
• Series: WE6
• Nominal Size: Size 6 / NG6
• Valve Configuration: 4-way
• Spool Code: J50
• Actuation: Direct solenoid actuation
• Solenoid Voltage: 110 VAC
• Frequency: 50 Hz
• Mounting: Subplate mounting
• Mounting Standard: ISO 4401-03-02-0-05
• CETOP Interface: CETOP 3 / D03
• Maximum Operating Pressure: 350 bar, family-level rating
• Maximum Flow, AC Version: 60 L/min
• Maximum Flow, DC Version: 80 L/min, not applicable to the supplied AW110 AC configuration
• Displacement: Not applicable
• Maximum Speed: Not applicable
• Control Method: Direct electromagnetic spool control
• Seal Material: Not independently verified from the currently searchable exact legacy ordering string
• Weight: Exact weight for this legacy AW11050NZ4 configuration is not directly published in the current official configurator
• Peak Pressure: No separate peak-pressure rating is defined; engineering selection should use the specified maximum operating pressure of 350 bar.

4WE6L50/AW11050NZ4

• Manufacturer: Bosch Rexroth
• Valve Type: Direct-operated solenoid directional spool valve
• Series: WE6
• Nominal Size: Size 6 / NG6
• Valve Configuration: 4-way
• Spool Code: L50
• Actuation: Direct solenoid actuation
• Solenoid Voltage: 110 VAC
• Frequency: 50 Hz
• Mounting: Subplate mounting
• Mounting Standard: ISO 4401-03-02-0-05
• CETOP Interface: CETOP 3 / D03
• Maximum Operating Pressure: 350 bar, family-level rating
• Maximum Flow, AC Version: 60 L/min
• Maximum Flow, DC Version: 80 L/min, not applicable to the supplied AW110 AC configuration
• Displacement: Not applicable
• Maximum Speed: Not applicable
• Control Method: Direct electromagnetic spool control
• Seal Material: Not independently verified from the currently searchable exact legacy ordering string
• Weight: Exact weight for this legacy AW11050NZ4 configuration is not directly published in the current official configurator
• Peak Pressure: No independent peak-pressure value is specified; maximum operating pressure is the applicable engineering limit.

Common WE6 Engineering Data

• Hydraulic Valve Family: WE6
• Maximum Operating Pressure: 350 bar
• Maximum Flow, DC: 80 L/min
• Maximum Flow, AC: 60 L/min
• Mounting Interface: ISO 4401-03-02-0-05
• Nominal Size: Size 6 / NG6
• Electrical Architecture: High-power wet-pin solenoid with detachable coil
• Component Series: 6X; Rexroth states that the 60–69 series retains the corresponding installation and connection dimensions.
• Hydraulic Fluids: HL, HLP, HLPD, HVLP, HVLPD and other approved fluids depending on seal compatibility.
• Displacement: Not applicable
• Maximum Speed: Not applicable
• Peak Pressure: Not specified as a separate engineering parameter

Key Technical Advantages

1. Direct-operated electromagnetic switching

The WE6 uses a direct-operated solenoid mechanism to move the hydraulic spool without a separate hydraulic pilot stage.

This produces a compact control architecture and is well suited to NG6/CETOP 03 hydraulic circuits. Bosch Rexroth’s official CAD data explicitly classifies the actuator as electric direct operated.

2. 350 bar high-pressure capability

The WE6 family is specified for up to 350 bar maximum operating pressure, allowing the compact Size 6 valve to be used in demanding industrial hydraulic control systems.

The 350 bar figure should be treated as the maximum specified operating pressure rather than a guarantee that every spool can continuously operate at 350 bar and maximum flow simultaneously.

3. 110 VAC industrial solenoid configuration

The AW110-50 arrangement is intended for 110 VAC, 50 Hz control systems.

This is fundamentally different from the common 24 VDC EG24 configuration, so replacement engineering must verify:

• Control voltage
• AC/DC type
• Frequency
• Coil rating
• Electrical connector
• Machine control architecture

Historical Rexroth records confirm AW110-50 configurations within the WE6 family.

4. Correct AC flow limit selection

Rexroth differentiates WE6 flow capability by solenoid type:

• DC: 80 L/min
• AC: 60 L/min

Because the supplied valves use AW110 AC solenoids, 60 L/min should be used as the series-level reference limit for SEO and engineering discussions.

5. Standard ISO 4401-03 mounting

The standardized ISO 4401-03 / CETOP 03 / D03 mounting interface simplifies integration into existing manifold blocks, subplates and compact hydraulic power units.

For true interchangeability, however, the mounting pattern alone is insufficient. The spool logic and electrical configuration must also match.

6. Wet-pin solenoid with detachable coil

Bosch Rexroth specifies a high-power wet-pin solenoid with detachable coil for the WE6 architecture.

This arrangement supports modular service of the electrical actuator and is advantageous when troubleshooting coil, connector and spool-actuation faults in the field.

7. Precision spool engineering

Long-term directional-valve performance depends on spool-to-bore clearance, metering-edge geometry, surface finish, solenoid force and hydraulic cleanliness.

For replacement manufacturing, simply duplicating the external housing is therefore insufficient. The internal spool geometry and hydraulic flow paths must reproduce the functional behavior of the original valve.

8. Suitable for OEM interchangeability programs

For legacy 4WE6J50/AW11050NZ4 and 4WE6L50/AW11050NZ4 replacement projects, interchangeability should be verified across four layers:

• Mechanical interface
• Hydraulic spool function
• Electrical configuration
• Dynamic switching performance

Our replacement engineering can focus on Interchangeability at both mechanical and functional levels, followed by 100% simulated operating-condition testing for pressure, flow, switching behavior, thermal stability and continuous operation.

Application Areas

Typical applications include:

• Industrial hydraulic power units
• Hydraulic presses
• Injection molding auxiliary circuits
• Machine-tool hydraulics
• Metal-forming machinery
• Hydraulic clamping systems
• Automated hydraulic actuators
• Hydraulic lifting systems
• Material-handling machinery
• Steel and metallurgical auxiliary hydraulic systems
• OEM hydraulic manifolds
• Legacy machine replacement programs

The J50 and L50 versions should always be selected according to the original hydraulic circuit symbol.

Expert Maintenance Tips

1. Confirm the J50 or L50 spool function

Do not order a replacement based only on “4WE6”.

The spool symbol defines the hydraulic routing logic, so J50 and L50 must be individually matched against the original circuit. Rexroth makes spool-symbol selection a fundamental part of the WE6 ordering structure.

2. Do not connect AW110 to a 24 VDC circuit

The AW110-50 configuration is an AC 110 V / 50 Hz solenoid.

Before installation, confirm:

• Supply voltage
• AC/DC type
• Frequency
• Coil identification
• Connector configuration

Incorrect electrical matching can result in failure to actuate or overheating.

3. Do not use the 80 L/min DC value for AC selection

For AW110 AC configurations, the WE6 family specifies a 60 L/min maximum flow, while 80 L/min applies to DC versions.

Applications approaching the 60 L/min limit should be checked against the relevant spool-specific pressure-drop characteristics.

4. Protect the CETOP mounting surface

Before installation:

• Clean the mounting face
• Inspect all O-rings
• Check the mounting holes
• Prevent contamination from entering the ports
• Inspect the subplate for distortion
• Tighten the valve according to the applicable fastening requirements

5. Check the solenoid and spool separately during troubleshooting

When the coil is energized but the valve does not shift, inspect:

• Actual coil voltage
• Electrical connector
• Solenoid mechanical condition
• Spool contamination
• Spool-to-bore friction
• Hydraulic oil cleanliness
• System pressure

Do not immediately replace the entire valve before separating electrical and hydraulic causes.

6. Perform functional testing after replacement

Recommended replacement validation includes:

• P-to-A / P-to-B flow-path verification
• A/B return-path verification
• Neutral-position verification where applicable
• Pressure-drop evaluation
• 110 VAC actuation test
• Repeated switching
• Thermal stabilization
• Continuous operation

For OEM replacement programs, 100% simulated operating-condition testing is recommended before shipment.