Maintaining Industrial Air Dryers: Troubleshooting Moisture and Dew Points

The Critical Role of Moisture Control in Heavy Industry

In manufacturing facilities using heavy-duty pneumatics, moisture is a system killer. Water droplets traveling down a high-pressure line cause corrosion in pneumatic tools, seize valves, and ruin fine powder coatings. This guide outlines how to maintain systems like the Atlas Copco F1670W Air Dryer.

1. Understanding the Dew Point

A refrigerated air dryer cools the compressed air to approximately 3°C to 5°C. This causes the water vapor to condense out of the air stream so it can be separated and ejected. If your live control panel indicates a dew point above 10°C, moisture will enter your assembly lines.

2. Top Causes of Dry Failure

• Fouled Heat Exchanger Coils: Industrial airborne particles choke the cooling fins, preventing the refrigerant circuit from dropping the incoming air temperature.
• Defective Timed Drain Valve: If the electronic drain valve fails to click open periodically, the collected water pools up inside the accumulator separator and gets re-entrained into the factory air flow.
• Refrigerant Undercharge: A slow leak drops the evaporator pressure, causing the unit to lose its thermal capacity.

Field PM Protocol

Technicians must inspect the auto-drain assembly weekly. Wash down the integrated strainer screens to clear any rust flakes traveling from old carbon-steel air tanks.

Keep your pneumatic lines bone dry. Book a preventative maintenance visit with Prime Cool.