norgren air drier

[volaredon]

I am looking to add a refrigerated air drier to my Emglo 2 stage upright 80 gallon compressor. 2 stage 4 cylinder pump, (I forget exactly) but its rated for 17-ish CFM at 175 PSI. so are these driers rated for max compressor output, or are they rated for usual CFM load?
The ones I am looking at are used, but working take outs. R-12 freon. Discontinued (probably due to the R12. Model number D-11-(something)

Thoughts were to run the tank outlet to my outlet hose. I don't have a plumbed shop (on my list for someday) They show a 10CFM drying capacity so if I keep my usage below that would it be sufficient? This is for my home shop, don't have much moisture issue in the line except in hottest days of summer. Not out there all day very often or every day. I thought of getting 2, one at tank outlet and the other just before my sandblast cabinet for that day when I get the garage plumbed for air.
anyone know anything about these units? Would I be better to plumb the outlet from the compressor head, between the head and the tank than on the tank outlet? If these are a bit undersized would it be OK to run a pair of them, in series? or as mentioned above, one at tank for general impact wrench, paint, die grinder etc use and one at the blast cabinet? I do plan on doing some painting in the garage in the not too distant future.

 

[PoorUB]

Just about every tool you mention uses more than 10 CFM so I would say the drier is too small.

Every drier I ever saw was connected after the tank, on the main line, or right before a critical tool.

 

[Jswain]

I would pass unless they are free and look at other means to accomplish what you would like to do ie: aftercooler between the pump/tank / filter / regulator / coalescing filter / dessicant filter of appropriate size(1/2"+) or a 20cfm+ refrigerated dryer.

If your air is already pretty dry start with the basic and go from there

 

[volaredon]

what do they mean "coalescing" filter? Ive heard the term before but never knew what it meant

 

[Jswain]

Alpha Coalescing & Particulate Filters

Coalescing & Particulate Filters remove liquid and particles down to 0.01 micron, ensuring high-quality compressed air with minimal pressure loss.

www.walkerfiltration.com

 

[Firstram]

Start with a Hayden oil cooler for an after cooler, then a water separator and coalescing filter before the tank. Well worth the effort and for a passive system it really strips some moisture.

 

[u3b3rg33k]

I've got the whole 9 yards at work. good enough for shop air:

full package compressor


water filter and coalescing filter in front of the dryer.



after a few thousand hours you'll see why you want filters in front.

if you skip the filters in front of the dryer, the inside of the dryer will end up looking like that, and my bet: it probably won't work well.

in the summer the aftercooler alone drops out gallons per day. the refrigerated dryer gets the last little bit. otherwise water continues to drop out as the air cools in the lines.

 

[metlmunchr]

A lot of refrigerated dryers have an upper limit on their entering air temperature that's well below the compressor's discharge temp, so placing it between the pump and primary tank isn't an option.

If using a pair of too small dryers, then you'd want to pipe them in parallel and not in series. Pushing 20 CFM thru a 10 CFM dryer doesn't imply that only a part of the water would be condensed. What's more likely is that the dryer can't get the volume of air down to the dew point, so most all the moisture just passes thru. Piped in parallel, each would be handling half the air, so the total capacity would be 20 CFM.

I'd agree with the above that R12 dryers wouldn't be worthwhile unless they're free. OEMs phased our R12 in new equipment 25 or more years ago due to the high tax on the gas. The gas itself was dirt cheap, but the high cost was a federal tax on each pound, and that was a cost that couldn't be mitigated by volume buying. 134A was a cheap and easy replacement in a product like a dryer where, unlike an automobile, no hoses or other components would present compatibility problems requiring major redesign. Anyway, any 25+ yr old compressorized equipment is a shot in the dark as regards additional remaining life, with short much more likely than long.

 

[u3b3rg33k]

a "high temp" dryer has a heat exchanger "in front" of the refrigerated section.


the one in the pictures I posted before is "high temp", and only uses 300W.

Atlas Copco 34 CFM Cycling Air Dryer Sized for 7.5 or 10 HP Air Compressor | FD15 115/1/60 Saver Cycle

<p><strong>BRAND NEW</strong> 34 CFM Cycling Refrigerated Dryer | Atlas Copco | FD15 115/1/60 Saver Cycle | 8102223396</p>

www.compressorworld.com

it pays for itself in reduced maintenance at least annually.