FAQ: Rexroth ZDB6VA2-4X/200

What is it?​

A solenoid-controlled unloading valve in a stacked design. It uses a VA2-type pilot stage.

Key specs?​

• Type:​ Stacked, solenoid-controlled unloading valve.

• Pressure:​ Set to 200 bar.

• Flow:​ 60 L/min.

• Voltage:​ 24V DC.

How does it work?​

Mounted between a directional valve and its subplate. When the solenoid is energized, the valve opens to unload the pump to tank. De-energizing it restores system pressure to 200 bar.

Main use?​

Integrated pump unloading for energy saving in directional valve stacks (e.g., machine tools, test stands).

What is "VA2"?​

It refers to the design of the single-stage pilot valve, which influences the valve's response speed and stability compared to other types like VP2.

Common issues?​

• Valve doesn't unload:​ Check solenoid and electrical connections.

• Pressure drop/instability:​ Check pilot supply pressure and for contamination.

• External leakage:​ Check seals between stacked plates.