4WREE10E50-23/G24K31/F1V | Rexroth Proportional Valve 315bar 180L/min

4WREE10E50-23/G24K31/F1V

Product Overview

The 4WREE10E50-23/G24K31/F1V (Material Number R900943094) is a Bosch Rexroth 4WREE series direct-operated proportional directional valve, NG10 (CETOP 5 / NFPA D05) size, with mounting pattern conforming to ISO 4401-05-04-0-05. This 4/3-way proportional directional valve features Symbol E spool, direct-operated construction with proportional solenoids featuring central thread and detachable coil.

The 4WREE series is a direct-operated proportional directional valve with electrical position feedback and integrated electronics (OBE) . The solenoids are controlled by the integrated electronics, enabling precise control of flow direction and magnitude via electrical signals. Internal piston position feedback ensures extremely high control accuracy.

Model Code Breakdown (4WREE10E50-23/G24K31/F1V):

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

• 10: Nominal Size NG10 (10 mm)

• E: Spool Symbol E

• 50: Nominal flow rating (50 L/min @ Δp = 10 bar per control edge)

• 23: 2X Component Series (23 = 2X series)

• G24: DC 24V supply (G = DC)

• K31: Control electronics interface — DIN EN 175201-804 connector, 6 + PE

• F1: Command signal type — 4–20 mA

• V: Seal material — FKM (Fluoroelastomer) 

Technical Specifications (Bulleted List)

• Model: 4WREE10E50-23/G24K31/F1V

• Material Number: R900943094

• 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 E

• Nominal Size: NG10 (10 mm)

• Mounting Standard: ISO 4401-05-04-0-05 / CETOP 5

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

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

• Nominal Flow (@ Δp = 10 bar): 50 L/min

• Maximum Flow: 180 L/min

• Supply Voltage: 24V DC

• Command Value Input: 4–20 mA (F1) 

• Electrical Connector: DIN EN 175201-804, 6 + PE (K31)

• Seal Material: FKM (Fluoroelastomer) 

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

• Hydraulic Fluids: HL, HLP, HLPD, HVLP, HVLPD, HETG, HEES, HEPG, HFDU, HFDR

• Weight: 6.5 kg

4WREE6E16-23/G24K31/A1V-655

Product Overview

The 4WREE6E16-23/G24K31/A1V-655 (Material Number R900950342) 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 E spool, direct-operated construction with proportional solenoids featuring central thread and detachable coil.

The 4WREE series is a direct-operated proportional directional valve with electrical position feedback and integrated electronics (OBE) . Internal piston position feedback ensures extremely high control accuracy. The -655 suffix denotes a factory internal configuration code.

Model Code Breakdown (4WREE6E16-23/G24K31/A1V-655):

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

• 6: Nominal Size NG6 (6 mm)

• E: Spool Symbol E

• 16: Nominal flow rating (16 L/min @ Δp = 10 bar per control edge)

• 23: 2X Component Series (23 = 2X series)

• G24: DC 24V supply (G = DC)

• K31: Control electronics interface configuration

• A1: Command signal type — 0–10V

• V: Seal material — FKM (Fluoroelastomer) 

• 655: Factory internal configuration code

Technical Specifications (Bulleted List)

• Model: 4WREE6E16-23/G24K31/A1V-655

• Material Number: R900950342

• 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 E

• Nominal Size: NG6 (6 mm)

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

• Maximum Operating Pressure: 350 bar (5075 psi) 

• Maximum Flow: 16 L/min

• Supply Voltage: 24V DC

• Command Value Input: 0–10V (A1) 

• Electrical Connector: Per EN standards

• Seal Material: FKM (Fluoroelastomer) 

• Hydraulic Fluids: HL, HLP, HLPD, HVLP, HVLPD, HETG, HEES, HEPG, HFDU, HFDR

• Weight: 2.2 kg

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 4–20 mA (F1) or 0–10V (A1) 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 piston position feedback. 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. Coils can be replaced without opening the pressure-tight chamber.

4. FKM Seals for Broad Fluid Compatibility

Both 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.

5. 315–350 bar High Pressure with High Flow Capacity

4WREE10E50-23/G24K31/F1V delivers 315 bar maximum operating pressure and 180 L/min maximum flow in an NG10 package. 4WREE6E16-23/G24K31/A1V-655 delivers 350 bar maximum operating pressure in an NG6 package. These are among the highest-performing direct-operated proportional directional valves in their respective classes.

6. International Standard Compliance for High Installation Compatibility

4WREE series mounting conforms to ISO 4401, DIN 24340 Form A, CETOP-RP 121H, and NFPA T3.5.1M R1 international standards. Fully compatible with globally adopted interfaces for direct replacement of same-series, same-specification products.

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

• 4WREE10E50-23/G24K31/F1V mounting must conform to ISO 4401-05-04-0-05.

• 4WREE6E16-23/G24K31/A1V-655 mounting must conform to ISO 4401-03-02-0-05.

• 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.

• 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 or synthetic oils.

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

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

3. Electrical Connection Specifications

• Both models use 24V DC supply.

• 4WREE10E50-23/G24K31/F1V command value input: 4–20 mA (F1) .

• 4WREE6E16-23/G24K31/A1V-655 command value input: 0–10V (A1) .

• Electrical connector per DIN EN 175201-804. Ensure the connector is fully locked during installation.

• 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.

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