When an electrical signal is sent to the proportional solenoid, it generates a force that moves the spool proportionally. This adjusts the opening of flow paths between ports P (pressure), A/B (actuator lines), and T (tank), enabling continuous control of flow direction and volume. The spool returns to center via springs when de-energized.

This valve suits applications requiring precise hydraulic control, such as:

• Industrial machinery (e.g., presses, plastic injection molding)
• Mobile equipment (e.g., cranes, excavators)
• Systems needing directional and flow control without integrated electronics

Model codes indicate specifications (e.g., 4WRA6E07-2X/G24N9K4/V):

• 4WRA6: Series and size (NG6)
• E07: Spool type and control configuration
• G24N9K4: 24V DC supply, corrosion-resistant coating

Consult REXROTH datasheets or suppliers for exact requirements like flow rate, spool type, and electrical inputs.

• Use the specified subplate (ISO 4401) to avoid leakage
• Ensure the tank line is never unloaded; a pre-load valve (~2 bar) may be required
• Verify electrical connections (e.g., 24V DC) and coil compatibility

• Regularly check for spool sticking or contamination
• Clean filters and monitor hydraulic fluid quality
• Replace coils or seals if movement is sluggish