Industrial Air Compressor Problems

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Thank you very much. You helped alot.

Isn't -40 C below the freezing point? So why would some one want the dew point so low. The water would freeze up in the dryer. Which may cause damage or at least reduce efficiency. Most dryer have dew point of 40° F(4.5°C). Is the dryer large enough for the amount of air (cfm) going though it? When was the last time it was serviced and the freon checked? What type of compressors do you have?

The dew point indicates the dryness of the product air. -40deg dewpoint (it is the same in °F and °C, BTW) indicates that the air is so dry that no H₂O will begin to condense out of it until the temperature of the cold surface is -40deg and falling, at which point it will frost things. -40deg dewpoint is a common specification for the dryness of instrument air, and it is maintained at this dryness precisely because frosting is not wanted at temperatures above -40deg. If the temperature is below that point, then there's a whole heap of other problems to attend to and the dryness of the air is academic!

Our System runs like this. Compressor, condensate unit(looks like a filter just has vanes inside to spin out water), 1.0um filter, 0.01um filter, true cycling dryer running in the -36 to -40 dewpoint then on to the reciever tank. Then depending on the point of use requirements we use 40um, 20um or 5um filters. If it needs more we use a condensate filter after the particulate filter. If it is a real picky unit we go with a desecant filter.

Thank you we are now going to look at changing our dryer to a Adsorption (Desiccant) Dryers. To be able to reach the dew point required for our machines.

You need a "bekomat" condensate drain system... www.bekousa.com ask for John... they have everything you need...

Refrigerant air dryers typically only are capable of delivering a pressure dew-point of approximately +38*F. To go lower, such as -40*F, you will need a regenerative twin tower desiccant dryer. I have been selling and servicing compressed air equipment for over 30 years and have never seen a refrigerant dryer that gives a -40*F dew-point