Expello drain valves
Electronic Drain Valve
The Expello electronic drain valve replaces the manual petcock on any air tank, on a truck or trailer. It purges water, dirt and oil in a quick 1-second burst every 5 minutes the vehicle is on – so the air stays clean and dry.
- 1 spurge
- every 5 minof vehicle on-time
- straight-throughdesign
How it works
Why Drain the Air Tanks?
Water, oil and dirt ruin air systems.
Contamination Builds Up
Compressed air carries water, compressor oil, carbon and rust into the air tanks. No system removes all of it all of the time, and manual petcocks rely on someone pulling the chain.
What It Costs
Left in the tanks it freezes in winter, corrodes cylinders, sticks valves, washes out lubrication and damages brake components – and frozen air brakes stop the vehicle.
Drain Automatically
An Expello valve replaces the petcock and blows the contaminants out with a short, powerful burst – on a timer (electronic) or every time the compressor cycles (pneumatic). Its straight-through design means the valve itself doesn’t collect moisture or debris.
Why the electronic valve
Set and Forget
Cleaner, Drier Air
Regular purges stop contamination building up.
No Frozen Brakes
Moisture is gone before it can freeze.
More Uptime
Protects air brake components.
Easy to Install
Replaces the drain petcock; wire to ignition power.
Related
More Information
Not Sure Which One You Need?
Tell us about the job – the machine, the conditions and what it has to do – and we’ll help you choose the right Expello product.