Robo Automatic Drain RD11

External Pneumatic Operated Condensate Drain

The Robo Drain RD11 is a fully automatic zero loss drain that doesn't require electricity. It has a translucent reservoir for visual assurance of operation and is an ideal choice for oil/water separators. It is a great fit for most compressor installations with a reliable design that is unaffected by contaminants.

Click the "Request FREE Quote" button or contact a specialist at ISC Sales today to discuss which condensate drain will work best for your application.

DownloadRobo Condensate Drain RD11 Brochure
DownloadRobo-Drain RD11 Installation and Operations Manual
DownloadRobo Drain RD11 Drawing

Features:Robo Automatic Drain RD11

  • Large 24 oz. discharge capacity
  • Isolated trigger assembly
  • Low profile
  • Nonclogging
  • Translucent reservoir
  • Full port drain valve
  • Fully pneumatic
  • Automatic design


  • Ideal for most compressor installations
  • Reliable design – unaffected by contaminants
  • Fits in tight spots
  • Saves valuable air. Saves money
  • Handles scale and rust without clogging
  • No electricity required
  • Operates on demand

How It Works

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 the valve actuator, which in turn opens a full-port drain valve.

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. The drain is then returned to the collection mode.


Inlets(2) 3/4″
Outlet1/2″ NPT
PowerClean, Dry Compressed Air 80 to 130 PSI
Pressure0 to 250 PSI
Operating Temperature32° to 180° F
Weight17 lbs.
Discharge24 Ounces per cycle


ReservoirAluminum and Composite
ValveBronze w/SS. Ball and Stem
FloatStainless Steel
SeatStainless Steel

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