This document introduces 4WRA and 4WRAE type 4/2- and 4/3-way proportional directional valves. These valves are direct operated, without electrical position feedback, without/with integrated electronics (OBE).
This manual describes the 4/2‑ and 4/3‑way proportional directional valves (types 4WRA and 4WRAE) produced by Bosch Rexroth. It covers the valve function, optional integrated electronics (OBE), ordering details, and the available nominal sizes (NS 6 and NS 10).\n\nTechnical data such as maximum operating pressure, flow capacities, electrical connections, supply voltage, and installation dimensions are provided. The document also includes wiring diagrams, pin allocation for plug‑in connectors, and specifications for the optional digital or analogue amplifiers that can be used with the valves.
| Nominal size | NS 6, NS 10 |
|---|---|
| Maximum operating pressure | 315 bar |
| Weight (4WRA) | 2.0 kg |
| Supply voltage | 24 VDC |
| Command signal | 10 V or 4‑20 mA |
| Maximum current per solenoid | 2.5 A |
The valve can operate up to 315 bar.
The valve is offered in nominal sizes NS 6 and NS 10.
The integrated electronics require a nominal supply voltage of 24 VDC.
The NS6 version can deliver up to 42 l/min.