ABAC QDT 115 Electronic Automatic Tank Drain for Air Receivers

The ABAC QDT 115 is an electronic automatic tank drain for compressed air receivers. It replaces the manual petcock at the bottom of the tank and clears condensate on a timer, so the water that collects in the receiver goes out on its own instead of waiting for somebody to remember to crack the valve.

Key details

• Model: QDT 115
• Part number: 8102048377
• Type: electronic timer operated automatic tank drain
• Fits: the ABAC vertical air receiver range
• Brand: ABAC, part of the Atlas Copco group

Why an automatic drain is worth fitting

Every compressor makes water. Air going into a receiver is warm and wet, it cools in the tank, and the moisture drops out and sits in the bottom. Left there it rusts the vessel from the inside, shortens the life of the tank, and carries downstream into air lines, tools and finishing work the moment the level gets high enough. A manual drain only works if it gets opened, and in most shops it does not get opened often enough.

An electronic timer drain takes the job off the operator. It opens on a set interval, discharges the collected condensate, and closes again. Fit one and the receiver drains whether anyone thinks about it or not, including over a weekend or a shutdown when the tank is sitting full of water and nobody is near it.

Installation notes

The drain goes into the bottom port of the receiver, which is usually the lowest point of the vessel so condensate collects there. Give the discharge somewhere to go. Condensate off a compressor carries oil, so in most places it cannot go to a floor drain untreated, and an oil water separator or a collection container is the normal answer.

If the drain is replacing a plugged or seized manual petcock, check the port thread before ordering fittings, and fit an isolation valve ahead of the drain so it can be serviced without depressurising the whole receiver.

What to pair it with

See our air receiver tanks and the rest of our condensate drains, including zero loss and demand style drains for larger systems. For treating the discharge, look at our oil water separators. Call us if you want the published electrical supply and timer settings for this drain confirmed against your receiver before you order.