Refrigerated air dryers

@Knick it does seem odd as the more i looked all the smaller units are non-cycling. Im like you in thinking high flow woukd just be on and cycling woukd be beneficial more on systems starting and stopping. I was thinking compresdor only runs a few times during say a slow day but dryer runs all day. I am assuming that the cost to make them cycling creates a price issue. But still does not make any sense. I am working on a controller to run mine so will cut it on when compressor starts snd then run it for a petiod of time after compressor shuts down so will cool itself down completely. Figured worth spending a 100 bucks to do the controller.

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But what about the air you use while compressor not running? It would need to be between compressor and tank right?

Well think like this, one that cycles would work like your A/C in your house. When the house gets hot A/C turns on and runs till it cools the house down. could be 30 mins if everything is shut up, might be 3 hours if people coming and going and so on.

Think of your air in the same way. Compressor pumps up and turns off. Drier turns off after so long.
you start using air and compressor remains off and you are using air, but drier is not running. compressor comes on and so does drier. Air flowing through drier, might make it take several mins to get cold. So all that air you used was not not conditioned.

A drier that cycles is just like your compressor that cycles.

Hope this makes sense it barley makes sense to me and I wrote it. :rofl:

You want it after the tank. That way the tank can help cool that air straight out of the compressor.

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That’s what I am saying if he puts a timer on it to come on when compressor runs then runs for so long after. What about the air used while compressor isn’t running. The only way to chill all the air would be to do it before 5he tank

@Phillipw still working out some of the details on usage such as time and also using flowmeter. Then i might just say scrap that and turn it on and let it run lol. I like tinkering with stuff and just making better mousetraps like that. Im building a new shop so lot of stuff is going in will be new so trying to make it the best on the first install. And one focal point is dry air beyond any doubt. That is why i kove this group. Lots of knowledge here and helps to get different perspectives and ideas as well as what people have tried with success and failure. My goal is to have success on everything first go round.

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True, But I don’t think a drier can handle the air temps straight out of the compressor.

Here is the brand of Drier I have. I do see anything about cycling? On mine there is a fan that cycles on and off so I thought mine was a cycling type, but I guess I cant say for sure. I guess you could call them and ask.
I think to set up a drier like you want to do, would require you to be able to sense ahead of time the starting of the compressor.
I would think that would be very hard to do, cant just do it by looking at air pressure.
I would think all driers would need a min or 2 to get down to temp.

https://eatoncompressor.com/product-category/air-dryers/
I have been very happy with both compressor and drier.

That was kinda what I meant with that statement not the best idea. Air dryers have a recommend inlet temp

The HF ones are no longer available. This week I tried calling three HF in my area and all said the same thing: “that item has been discontinued”.

One store did say that often means a new model is coming, but of course they have no more info on what/when.

I had to online order mine local store didn’t stock them.

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@Knick specs look pretty good on that dryer. What are you using to cool your tank air before the dryer? Once mine is all setup and done will have a cooler bwtween compresor and tank and between tank and dryer.

Just the finned round tube that is behind the fan/pulley that came on the compressor. My compressor is a 7.5HP Polar air should be on that same website.
I have the compressor with a auto drain, into the drier out to piping. I have a regulator and motor guard filter just in front of the Razor Weld.
Nothing fancy but it seems to work pretty well. Now will I get as much life out of my consumables as I could with a better system? probably not.
But consumables are pretty cheap and once I see how things work out I can make the call as if I need more drying equipment then I have.

I look at it like this, some people have had all kinds of trouble with using ethanol based fuel in small power equipment and only run Rec Gas. I on the other hand have never had any trouble and have never bought Rec Fuel. Some times I run all the fuel out before I store for winter and some times I add Stabil. Some times I forget to do both, and I still have had no problems. I have no idea as to why.
I also go 10,000 miles between oil changes :rofl:

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@Knick i totally understand how there can be so many different setups. That is what i am after just to gave a good system without overkill. I am going to be running a fan forced plate cooler before the compressor and monitor tank outlet temps before dryer and see what they run. Looking at the specs on the dryer you are using it has max 150 inlet temp which is pretty high so i doubt if you get that high. As long as mine cuts and dont kill the consumables with every cut will be good lol.

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Let us all know how you come out! And show some pics of your set up. I love pictures!

@Knick i will post as I get more going as waiting on the electrician to come wire the building so it has been slow go with everything. Only thing in the building is a new compressor and phase converter.


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American rotary is a good choice for your phase converter. Mine has worked flawlessly for 7 years now.

@Bigdaddy2166 i have heard nothing but good stuff with american rotary. An electrian built this one back in the 80s and has never missed a beat. If it ever gives up will replace it with American rotary. They had some killer sales for black friday. They were 25% off. I seriously thoight about buying a new one lol.

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Mines a 10hp version. I use it for an old cream puff three phase Bridgeport mill.
Very noisy thought . If I did it over, I would have mounted it outside in an enclosure.

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@Bigdaddy2166 mine is 15 hp and pretty quiet even with the idler motor being on it. No telling the hours on mine.

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