External Pneumatic Operated Condensate Drain for Vacuum Systems

A fully automatic, zero loss drain for vacuum systems that requires no electricity. Translucent reservoir for visual assurance of operation. Vacuum to 26″ Hg.


  • Complete drain system
  • Isolated trigger assembly
  • Heavy duty industrial drain
  • Horizontal low profile
  • Translucent reservoir
  • Non clogging, full port drain valve
  • Fully pneumatic
  • Automatic design
  • NPT or BSPP connections available 


  • Designed for most vacuum systems
  • Reliable design – unaffected by contaminants
  • One unit works for multiple compressed air systems. Saves valuable air. Saves money
  • Fits in tight spots – can be mounted under equipment
  • Easy-to-see condensate level. “Quick check”
  • Handles scale and rust without clogging
  • No electricity required
  • Operates on demand

How it Removes Condensate From Vacuum Systems

Condensate enters the drain through one of two inlet connections. As condensate is collected and the translucent reservoir fills, a stainless steel float mechanism rises. When the condensate reaches a design level, the float mechanism actuates an isolated magnetic trigger assembly. The trigger assembly directs control air to close a pinch valve and balance line valve to isolate the drain from the vacuum system. Next air is directed to the drain valve actuator to open a full-port drain valve and to the drain reservoir to drive condensate from the reservoir.

Condensate will then exit the unit. As the float drops, the trigger assembly closes the control air line and the valve actuator closes the ball valve. At the same time, the pinch valve and balance line valves are opened and the drain is returned to the collection mode.


Inlets(2) 3/4″ NPT (BSPP Connections Available)
Outlet1/2″ NPT (BSPP Connections Available)
PowerClean, Dry Compressed Air 80 to 130 PSI
Pressure26″ Hg vacuum to 90 PSI
Operating Temperature32° to 180° F.
Weight17 lbs.
Discharge24 ounces per cycle


Reservoir Aluminum and Composite
ValveBronze w/S.S. Ball and Stem
FloatStainless Steel
SeatStainless Steel
*Consult factory for additional options


Ordering Information

Stock No.Description
RD11-VAC Robo-Vac

Support and Downloads

Robo-Drain RD11-VAC Installation Operating Manual

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