Best location of refrigerated air drier in system?

Post by hsolve » Sun Mar 20, 5:50 am

Goto NAILI to know more.

Good morning to all.
I have a rotary screw 3phase compressor, about 70cfm, It was ordered with the refrigerated dryer attached to the main body. The discharge from the compressor is plumbed to the receiver then through the dryer. The drier inlet line is fitted with a 5micron filter to stop 'crap' getting caught inside the cooling part of the refrigerated dryer. The refrigerated dryers are from what I have seen basically two stage. The incoming air is cooled by the refrigeration circuit then on it's way out is warmed by the hot air coming from the compressor. Please forgive me for the explanation which technically may not be correct but the schematics will explain. This cooling and subsequent warming reduces the relative humidity of the air out to the job or air users. My set up is as described, one thing to note that the dryer has an automatic drain, when the drain fills to the predetermined level, it lifts a float and opens the drain. Simple operation, the refrigerated dryer operates at 3Celcius due point. The air coming from the compressor when operating at full capacity is about 50 to 60 Celcius as the compressor is aftercooled, the air coming out from the dryer is about 16Celcius and quite dry. I also use the compressor to abrasive blast using smaller nozzels up to 1/4" and have not had any moisture in the system when the refrigerated dryer was operating.

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I run a pair of 2 stage compressors with the pressure switches slightly offset. 90% of the time only one compressor runs, if I am using a lot of air the second compressor will kick in and help. I have them tied into one feeder line that enters 2 stages of oil/water canister filters before going into a hankison refrigerated dryer. I am currently regulating pressure at the inlet of the dryer, about 120 psi. Out of the dryer my air splits off in different directions. I go 3/4" to my main feeders for shop tool air and I have a 1/2" that goes to my booth. Outside of my booth I have a sharpe 3 stage cleaner/dryer with desiccant. I follow the desiccant with a motorguard sub micronic filter, then I go through the wall into the booth with Milton V style fittings and a 3/8" hose.

I'm happy with my setup except I need to add one more regulator, then I can move my current regulator to the post dryer position along with another. (one for my booth feeder and one for my shop air lines.) I want to cut my shop air back to 100 psi but I'd like to leave my booth feeder at around 125.

I guess I'd only use enough flex to get from your tank to your hard lines.

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