Proportional and Servo Valves
Hydraulic Directional Control
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Improving Performance and Accuracy
Standard directional proportional valves are perfect for many hydraulics applications. There are low cost designs without spool feedback for manual and open loop control applications. These can be direct or pilot operated. General purpose valves have better axis performance and accuracy, and Rexroth has implemented valve design improvements that have reduced cost. Consequently, these standard proportional directional valves work well in many closed loop applications.
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Model 4WRA(E)B Proportional Directional Control Valve
Hydraulics Application: 4/2 and 4/3-Way Proportional Directional Control Valve, Direct-Operated
Key features:
- Size 6
- Electrically operated, mechanical feedback
- Listen to PodCast for In-depth Technical Benefits
Download 4WRA(E)B Proportional Directional Control Valve Data Sheet
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Model 4WRA and 4WRAE Proportional Directional Control Valves
Hydraulics Application: 4/2- and 4/3-way proportional directional valves, direct operated, without electrical position feedback
Key features:
- Sizes 6 and 10
- Porting pattern to ISO 4401
- Control of the direction and magnitude of a flow
- Proportional solenoid operation
- Spring-centered control spool
- Different spool overlaps possible
- Integrated control electronics (OBE) for type 4WRAE
- Listen to PodCast for In-depth Technical Benefits
Download 4WRA and 4WRAE Proportional Directional Control Valve Data Sheet
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Model 4WRE and 4WREE Proportional Directional Control Valves
Hydraulics Application: 4/2 and 4/3-way proportional directional valves, direct operated, with electrical position feedback
Key features:
- Sizes 6 and 10
- Series 2x
- Maximum operating pressure 315 bar (4600 psi)
- Maximum flow 80 L/min (21 GPM) Size 6
- Maximum flow 180 L/min (47 GPM) Size 10
- Listen to PodCast for In-depth Technical Benefits
Download Model 4WRE and 4WREE Proportional Directional Control Valves Data Sheets
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Model 4WRBA-EA, 4WRBA-E-W and 4WRBAE../..W Proportional Directional Control Valves
Hydraulics Application: Proportional directional valves, without position control
Key features:
- Sizes 6 and 10
- Series 2x
- Maximum operating pressure P, A, B 315 bar, T 250 bar
- Options include 4/2 and 4/3-way
Download 4WRBA-EA, 4WRBA-E-W and 4WRBAE../..W Proportional Directional Control Valves Data Sheets
4/2 proportional directional control valve, without position control
4/3 proportional directional control valve, without position control
4/3 proportional directional control valve, without position control, with on-board electronics (OBE)
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Model KKDSR1 and KBPS.9 Proportional Directional Pressure Relieve Valves
Hydraulics Application: Proportional pressure relief valves, direct operated
Key features:
- Pilot valve
- T8A cavity
- Maximum operating pressure 350 bar (5076 psi)
- Maximum flow 2 L/min (0.53 GPM)
Download KKDSR1 Proportional Directional Pressure Relieve Valve Data Sheets
2/2-way proportional valves (cartridge valve), direct operated
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Model 4WRH, 4WRZ, 4WRZE Proportional Directional Valves
Hydraulics Application: 4/2, 4/3 and 5/2, 5/3 proportional directional valves, pilot operated, without electrical position feedback
Key features:
- Sizes 10 to 52
- Porting pattern to ISO 4401
- Control of the direction and magnitude of a flow
- Pilot control via 3-way pressure reducing valve
- Spring centering and anti-rotation feature of the main spool
- Different spool overlaps possible
- Integrated control electronics (OBE) for type 4WRZE
- Listen to PodCast for In-depth Technical Benefits
Download 4WRH, 4WRZ, 4WRZE Proportional Directional Valves Data Sheets
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Model 4WRK and 4WRKE Proportional Directional Valves
Hydraulics Application: Proportional directional valves, pilot operated, with integrated control electronics (OBE) and electrical position feedback
Key features:
- Sizes 10 to 35
- Porting pattern to ISO 4401
- Control of the direction and magnitude of a flow
- Pilot control via 3-way proportional directional valve without position feedback
- Spring-centering of the main spool
Download 4WRK and 4WRKE Proportional Directional Valve Data Sheets
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Model ZDC Pressure Reducing Valves
Hydraulics Application: Meter-in pressure compensator, direct operated
Key features:
- Sizes 6,10, 16, 25 and 52
- Meter-in pressure compensators
Download ZDC Pressure Reducing Val Data Sheet
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For more information or to order brochures and catalogs, contact your nearest distributor.
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