Moisture in gas lines

[tangaloomaflyer]

What's the best way to purge moisture from gas lines? Is any particular gas better than another? The line usually carries instrument air.

[aidnai]

Eliminate dead volume when possible. Elevated temp is very helpful, for small scale work I've used a heat gun to warm the tubing. Vacuum/pressure swinging can be very effective.

I tend to use nitrogen because it is so cheap and I'm not aware of any benefits of using a different gas. Basically you need to get adsorbed water molecules off the tubing walls and into the gas phase, then sweep them along and out.

[tangaloomaflyer]

Thanks