4WREE10W75-3X/V/24A1 | Rexroth Proportional Valve 350bar 75L/min NG10

4WREE10W75-3X/V/24A1

Product Overview

The 4WREE10W75-3X/V/24A1 (Material Number R901572017) is a Bosch Rexroth 4WREE series direct-operated proportional directional valve. NG10 (CETOP 5) size, with mounting pattern conforming to ISO 4401-05 standards. This 4/3-way proportional directional valve features Symbol W spool with direct-operated construction, actuated by proportional solenoids with central thread and detachable coil.

The 4WREE series features electrical position feedback and integrated on-board electronics (OBE) . The solenoids are controlled by the integrated electronics, enabling precise control of flow direction and size via electrical signals. Internal piston position feedback ensures extremely high control accuracy. This model features 3X Component Series (30–39 series) with a nominal flow of 75 L/min (@ Δp = 10 bar)and a maximum operating pressure of 350 bar.

Model Code Breakdown (4WREE10W75-3X/V/24A1):

• 4WREE: Direct-operated proportional directional valve with electrical position feedback and integrated electronics (OBE)

• 10: Nominal Size NG10 (10 mm)

• W: Spool Symbol W

• 75: Nominal flow rating — 75 L/min

• 3X: 3X Component Series (30–39 series)

• V: FKM seals

• 24A1: Power supply and control interface — 24V DC, ±10V / 4–20mA

Technical Specifications 

• Model: 4WREE10W75-3X/V/24A1

• Material Number: R901572017

• Brand: BOSCH REXROTH

• Series: 4WREE Series, 3X Component Series

• Product Type: Direct-operated proportional directional valve with electrical position feedback and integrated electronics (OBE)

• Spool Configuration: 4/3-way

• Spool Symbol: Symbol W

• Nominal Size: NG10 (10 mm)

• Mounting Standard: ISO 4401-05

• Mounting Type: Subplate Mounting

• Maximum Operating Pressure P/A/B: 350 bar (5075 psi) 

• Maximum Operating Pressure T: 210 bar (3045 psi) 

• Nominal Flow (@ Δp = 10 bar): 75 L/min

• Supply Voltage: 24V DC

• Command Value Input: ±10V / 4–20mA (with reference signal input)

• Position Feedback Output: ±10V / 4–20mA

• Seal Material: FKM (Fluoroelastomer) 

• Certifications: CE

4WREE10W1-75-2X/G24K31/A1V

Product Overview

The 4WREE10W1-75-2X/G24K31/A1V (Material Number R900927234) is a Bosch Rexroth 4WREE series direct-operated proportional directional valve. NG10 (CETOP 5) size, with mounting pattern conforming to ISO 4401-05-04-0-05. This 4/3-way proportional directional valve features Symbol W1 spool (overlap spool with positive overlap) with direct-operated construction, actuated by proportional solenoids with central thread and detachable coil.

The 4WREE series features electrical position feedback and integrated on-board electronics (OBE) . The solenoids are controlled by the integrated electronics, enabling precise control of flow direction and size via electrical signals. Internal LVDT spool position feedback ensures extremely high control accuracy. This model features 2X Component Series (20–29 series) with a nominal flow of 75 L/min (@ Δp = 10 bar)and a maximum operating pressure of 315 bar.

Model Code Breakdown (4WREE10W1-75-2X/G24K31/A1V):

• 4WREE: Direct-operated proportional directional valve with electrical position feedback and integrated electronics (OBE)

• 10: Nominal Size NG10 (10 mm)

• W1: Spool Symbol W1 (overlap spool with positive overlap)

• 75: Nominal flow rating — 75 L/min

• 2X: 2X Component Series (20–29 series)

• G24: DC 24V supply

• K31: 7-pin connector (6 + PE) per DIN EN 175201-804

• A1: Command signal type — ±10V

• V: FKM seals

Technical Specifications (Bulleted List)

• Model: 4WREE10W1-75-2X/G24K31/A1V

• Material Number: R900927234

• Brand: BOSCH REXROTH

• Series: 4WREE Series, 2X Component Series

• Product Type: Direct-operated proportional directional valve with electrical position feedback and integrated electronics (OBE)

• Spool Configuration: 4/3-way

• Spool Symbol: Symbol W1 (overlap spool with positive overlap)

• Nominal Size: NG10 (10 mm)

• Mounting Standard: ISO 4401-05-04-0-05

• Mounting Type: Subplate Mounting

• Maximum Operating Pressure P/A/B: 315 bar (4568 psi) 

• Maximum Operating Pressure T: 210 bar (3045 psi) 

• Nominal Flow (@ Δp = 10 bar): 75 L/min

• Maximum Flow: 180 L/min

• Spool Characteristic: Progressive

• Supply Voltage: 24V DC

• Command Value Input: ±10V

• Position Feedback: LVDT spool position sensor

• Electrical Connector: 7-pin (6 + PE) plug per DIN EN 175201-804

• Seal Material: FKM (Fluoroelastomer) 

• Media Temperature: -20°C to +80°C

• Viscosity Range: 20–380 mm²/s

• Weight: Approx. 6.26 kg

4WREE6W32-24/G24K31/F1V

Product Overview

The 4WREE6W32-24/G24K31/F1V (Material Number R900911004) is a Bosch Rexroth 4WREE series direct-operated proportional directional valve. NG6 (CETOP 3) size, with mounting pattern conforming to ISO 4401-03-02-0-05. This 4/3-way proportional directional valve features Symbol W spool with direct-operated construction, actuated by proportional solenoids with central thread and detachable coil.

The 4WREE series features electrical position feedback and integrated on-board electronics (OBE) . The solenoids are controlled by the integrated electronics, enabling precise control of flow direction and size via electrical signals. Internal piston position feedback ensures extremely high control accuracy. This model features 24 Component Series with a nominal flow of 32 L/min (@ Δp = 10 bar)and a maximum operating pressure of 315 bar.

Model Code Breakdown (4WREE6W32-24/G24K31/F1V):

• 4WREE: Direct-operated proportional directional valve with electrical position feedback and integrated electronics (OBE)

• 6: Nominal Size NG6 (6 mm)

• W: Spool Symbol W

• 32: Nominal flow rating — 32 L/min

• 24: 24 Component Series (20–29 series)

• G24: DC 24V supply

• K31: 7-pin connector (6 + PE) per DIN EN 175201-804

• F1: Command signal type — 4–20mA

• V: FKM seals

Technical Specifications (Bulleted List)

• Model: 4WREE6W32-24/G24K31/F1V

• Material Number: R900911004

• Brand: BOSCH REXROTH

• Series: 4WREE Series, 24 Component Series

• Product Type: Direct-operated proportional directional valve with electrical position feedback and integrated electronics (OBE)

• Spool Configuration: 4/3-way

• Spool Symbol: Symbol W

• Nominal Size: NG6 (6 mm)

• Mounting Standard: ISO 4401-03-02-0-05

• Mounting Type: Subplate Mounting

• Maximum Operating Pressure: 315 bar (4568 psi) 

• Nominal Flow (@ Δp = 10 bar): 32 L/min

• Supply Voltage: 24V DC

• Command Value Input: 4–20mA (F1) 

• Seal Material: FKM (Fluoroelastomer) 

• Protection Class: IP65 (with properly installed connector)

Key Technical Advantages (4WREE Series Common)

1. Integrated On-Board Electronics (OBE) — No External Amplifier Required

The 4WREE series comes standard with integrated on-board electronics (OBE) , directly accepting ±10V or 4–20mA command signals. This significantly simplifies the electrical control architecture, reduces external component count, and minimizes system failure points.

2. Electrical Position Feedback for Extremely High Control Accuracy

The 4WREE series is equipped with electrical position feedback, enabling precise monitoring and control of spool position via internal LVDT spool position sensors. The feedback signal is continuously compared with the command value, ensuring extremely high repeatability and minimal hysteresis.

3. Direct-Operated Design for Fast Response

The direct-operated design employs proportional solenoids to directly actuate the control spool with no pilot stage delay. Solenoids feature central thread and detachable coil construction for easy maintenance.

4. 350 bar / 315 bar High Pressure with High Flow Capacity

4WREE10W75-3X/V/24A1 delivers 350 bar maximum operating pressure and 75 L/min nominal flow. 4WREE10W1-75-2X/G24K31/A1V delivers 315 bar maximum operating pressure and 75 L/min nominal flow (max. flow 180 L/min). 4WREE6W32-24/G24K31/F1V delivers 315 bar maximum operating pressure and 32 L/min nominal flow in an NG6 package.

5. FKM Seals for Broad Fluid Compatibility

All three models are equipped with FKM (fluoroelastomer) seals , compatible with HL, HLP, HLPD, HVLP, HVLPD, HETG, HEES, HEPG, HFDU, HFDR, and other hydraulic fluids. FKM seals offer superior heat and chemical resistance.

6. International Standard Compliance for High Installation Compatibility

4WREE series mounting conforms to ISO 4401 international standards. Fully compatible with globally adopted NG6/NG10 interfaces for direct replacement of same-series, same-specification products. The 7-pin device plug (6 + PE) conforms to DIN EN 175201-804.

Application Areas

• Injection Molding Machinery — Precise proportional control of injection speed and holding pressure

• Die-Casting Machines — Proportional regulation of injection speed and pressure

• CNC Machine Tools — Proportional control of spindle feed rates and worktable indexing

• Material Testing Machines — Precise proportional control of loading force and displacement

• Metallurgical Equipment — Precise position and speed control for rolling mill hydraulic systems

• Wind Turbine Systems — Hydraulic proportional control for pitch systems

• General Industrial Hydraulic Systems — Various high-precision applications requiring proportional directional and flow control

Expert Maintenance Tips

1. Installation Guidelines

• Mounting surface must conform to ISO 4401 standards (NG6 or NG10).

• 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.

• Tighten mounting bolts evenly to the specified torque to ensure proper sealing between the valve body and mounting surface.

• Important Notice: The PG fitting (11) must not be opened. Mechanical adjustment of the adjustment nut located below is prohibited and damages the valve.

2. Hydraulic Fluid Cleanliness

• Recommended fluids: Mineral oils per DIN 51524 (HL, HLP, HLPD, HVLP, HVLPD) or synthetic oils (HETG, HEES, HEPG, HFDU, HFDR).

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

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

• Media temperature range: -20°C to +80°C.

3. Electrical Connection Specifications

• All three models use 24V DC supply.

• 4WREE10W75-3X/V/24A1 command value input: ±10V / 4–20mA.

• 4WREE10W1-75-2X/G24K31/A1V command value input: ±10V.

• 4WREE6W32-24/G24K31/F1V command value input: 4–20mA (F1) .

• Electrical connector: 7-pin device plug (6 + PE) per DIN EN 175201-804. Ensure the connector is fully locked to prevent contact issues caused by vibration.

• Shielded cables are recommended for command signal connections to prevent electromagnetic interference.

4. Tank Line Precautions

• The tank line must not be allowed to run empty.

• With corresponding installation conditions, a preload valve (preload pressure approx. 2 bar) must be installed.

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.

• Periodically inspect OBE electronics status to confirm normal power supply and command signal.

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

• Solenoid coils can be replaced without disturbing hydraulic connections.

• Note: Due to the design principle, internal leakage which may increase over the life cycle is inherent to the valves.