Proportional and Servo Valves Hydraulic Directional Control 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. Data Sheet (PDF) RA 29 057 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 Data Sheet (PDF) RE 29 055 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 Data Sheet (PDF) RE 29 047 RE 29 049 RE 29 051 Model 4WRBA..EA, 4WRBA..E.W. and 4WRBAE..E./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..E./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) Data Sheet (PDF) RE 29 061 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 Data Sheet (PDF) RE 29 020 RA 29 022 Models 4WRP..EA and 4WRP..E./W. Proportional Directional Control Valves Hydraulics Application: Servo solenoid valves with positive overlap and position feedback (Lvdt AC/AC) Key features: Size 6 and 10 Series 1X Maximum operating pressure P, A, B 315 bar (4600 psi) Download 4WRP..EA and 4WRP..E./W. Proportional Directional Control Valves Data Sheets 4/2 servo solenoid valves (4WRP ..EA..) 4/2 servo solenoid valves (4WRP ..E.. / ..W..) Data Sheet (PDF) RA 29 024 RE 29 025 Models 4WRPE..EA and 4WRPE..E./W. Proportional Directional Control Valves Hydraulics Application: Servo solenoid valves with on-board electronics, positive overlap and position feedback Key features: Size 6 and 10 Series 1X Maximum operating pressure P, A, B 315 bar (4600 psi) Download 4WRPE..EA and 4WRPE..E./W. Proportional Directional Control Valves Data Sheets 4/2, with on-board electronics (4WRPE ..EA..) 4/3, with on-board electronics (4WRPE ..E.. / ..W..) Data Sheet (PDF) RA 29 043 RE 29 045 Model 5WRP and 5WRPE Proportional Control Valves Hydraulics Application: High-response directional valves, direct operated, with electrical position feedback Key features: Size 10 Porting pattern to DIN 24340 form A and ISO 4401 Control of flow P – A / A – T Application for closed-loop velocity and pressure controls Actuation through control solenoid Position sensing of the control spool via an inductive position transducer Integrated control electronics (OBE) for type 5WRPE Linear characteristic curve Download 5WRP and 5WRPE High Response Directional Control Valves Data Sheets Servo solenoid valves with electrical position feedback (Lvdt DC/DC ±10 V) (WRP) Servo solenoid valves with on-board electronics (OBE) (WRPE) Data Sheet (PDF) RE 29 115 Model 4WRH, 4WRZ, 4WRZE Proportional Directional Control 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 Control Valves Data Sheets Data Sheet (PDF) RA 29 075 Model 4WRKE Proportional Directional Control Valve 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 Proportional Directional Control Valve Data Sheet For more information or to order brochures and catalogs, contact your nearest distributor.