RD750 Robo-Drain Demand Drain

Robo-Drain RD750

External Pneumatic Operated High-Pressure Condensate Drain

A fully automatic, zero loss drain that protects compressed air systems with out the need for A fully automatic, High Pressure, zero loss drain that requires no electricity. Stainless Steel vessel for 750 PSIG design. Ideal for Oil/Water Separators.


  • Large 24 oz. capacity discharge 
  • Isolated trigger assembly 
  • Heavy duty industrial drain 
  • Horizontal low profile 
  • Stainless steel reservoir
  • Non clogging, full port drain valve
  • Fully pneumatic
  • Automatic design
  • NPT or BSPP connections available 


  • Ideal for high pressure compressor installations 
  • 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
  • Durable for high pressure capacity
  • Handles scale and rust without clogging
  • No electricity required
  • Operates on demand

How it Removes Condensate From Compressed Air 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 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″ NPT (BSPP Connections Available)
Outlet1/2″ NPT (BSPP Connections Available)
PowerClean, Dry Compressed Air 80 to 130 PSI
Pressure0 to 750 PSI
Operating Temperature32° to 180° F.
Weight22 lbs.
Discharge24 ounces per cycle


Reservoir 304 Stainless Steel
ValveStainless Steel w/S.S. Ball and Stem
FloatStainless Steel
SeatStainless Steel
*Consult factory for additional options


Ordering Information

Stock No.Description
RD750 Robo-Drain RD750

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