R900727361 4WRKE16E-200L-3X/6EG24EK31/A1D3M Pilot operated proportional directional control valve from Rexroth Germany

FAQ:

1. Pilot Oil Configuration (/6EG24EK31)

   This valve uses external pilot oil supply (X port) and external pilot oil return (Y port). You must provide clean, filtered pilot oil to the X port (25–315 bar) and ensure the Y port drains directly to the tank with minimal backpressure (max 10 bar).

2. Control Signal (/A1)

   The /A1​ suffix indicates a ±10 V voltage input. This is ideal for high-precision control systems (e.g., servo controllers) where fine resolution and fast signal response are required.

3. Integrated Pressure Reducing Valve (/D3)

   The /D3​ option includes an integrated ZDR 6​ pressure reducing valve. It ensures the pilot stage receives a stable, reduced pressure (typically around 40 bar), protecting the sensitive pilot valve from high and fluctuating main system pressures.

4. Critical Installation Notes

   • Drain Line:​ The external pilot drain (Y port) must be connected directly to the tank with a dedicated line. Backpressure on Y must be < 10 bar.

   • Cleanliness:​ Maintain high oil cleanliness (recommended NAS 1638 Class 8 or ISO 4406 20/18/15 for the main stage).

   • Pilot Supply:​ Provide clean, regulated pilot pressure to the X port.