Condensate Is A Problem

Condensate is a problem in your air lines, for all kinds of reasons.

Free water and water vapor in your air lines could cost you thousands of dollars in maintenance to downstream air valves, air cylinders, air motors - all kinds of air operated actuators and equipment that have a negative reaction to water or water vapor in your compressed air.

Yes, water generated by compressing air can create huge problems. Here are what some of the problems are and how they can affect your air, your air-lines, and the tools, valves and actuators that you use in your plant.

Condensation

The air mains in your plant find themselves an ideal depository for the water vapour that condenses into free water as air from your compressor cools in those mains.

But, free water is not all that's likely to end up in your air-lines and into your air tools, valves and cylinders as a result of the water created by compressing your air. That water causes big problems!

Rust

Are your air mains black pipe? If I had made the decision for you, the higher cost of copper pipe as air lines could see payback over time, as black pipe rusts in contact with water or water vapour! Rust particles will travel along the mains with the water slurry, pour down your drop legs from the overhead mains, and slop into your air equipment.

It is when your equipment has been idle for a while, and that rust slurry dries, that the problems really start as your valves stick, insides of your cylinder barrels score with the abrasive rust, and so on. Rust is a real problem created by water in your black pipe air mains.

Oil

As your air compressor is working, the components that actually compress the air are often bathed in, or operate in, a bath of oil.

Despite the best efforts of air / oil separators, and particularly if the compressor has seen significant use, older piston types in particular, the amount of oil that carries over to your compressor tank and from there into your air lines grows.

Unless your compressor is an oil-less type, meaning that in this type of compressor no oil contacts the compressed air, lubricating oil inside the compressor will inevitably make it onto the compressed air side of the compressor.

What is the problem with compressor lubricating oil? We sometimes lubricate our air line components, don't we?

Oil Additives

There's a word we're sure you've heard before.

The additive chemicals that make up the formula for the lubricating oil for compressors are by and large negative to the Buna rubber type of seals found in most air line components. Compressor lubrication oil will either dissolve the Buna seals, or, cause them to bloat, creating problems for the valves and cylinders and other equipment downstream from the compressor.

I expect that the lubricating oil manufacturers would love to have lubricant formula for compressors that was Buna-N and seal-safe. I suspect that that nature of the environment inside the compressor requires the seal-aggressive additives to be in the lubricant to allow it to function properly, and the absence of those additives would prevent good lubrication of the compressor moving parts, and allow damage to the compressor, a cost problem of greater magnitude.

Crud Soup

Why is the water, and the other unwanted elements migrating into your air lines a problem?

The combination of water and the soup of contamination from the receiver, coupled with any contaminants in the main air lines (rust from the pipes / pipe dope, etc.) can send a slurry of crud down the air lines, possibly migrating through your air valves, to the actuators, or into your air tools.

When the equipment stops, and when the equipment cools, the soup dries. It hardens into a varnish-like consistency that effectively slows or stops the operation of some of your control and actuator equipment. Next time you want to start the machine, it won't go.

Expensive

This costs you money in lost production, labor for maintenance staff to diagnose and resolve the problem, and wasted air equipment due to shortened life expectancy.

Even if it's just straight water that's moving down the lines, that water tends to wash out factory lubrication in the various air line components, hastening their demise!

You can't stop your compressor from introducing gallons of water into the receiver. You do want to, and can, slow the compressor generated water from getting into your air lines. It is in your best interests to ensure that any water that does migrate to your lines from the receiver, gets taken out before it gets to air tools and other air driven equipment.

There's lots of information about dealing with that right here.