The refrigerated dryer was the only non redundant element due to expense, but I had a bypass around it to allow for maintenance. The jars were redundant with valves to allow maintenance while the other one was in use. A large filter jar is mounted there to collect the water.įrom the top of the coil, it goes to another jar with desiccant and then to a refrigerated dryer. It is fed from the bottom of the spiral so that any condensate will drain back towards to the tank. A 50 or 100 foot coil/spiral of copper pipe works well. Everything was drained on a regular schedule using manual valves: auto dump valves can be counted on to fail.įrom the tank, I would add a section of cooling pipe, also in an air conditioned space. Everything was redundant, 2 or 3 compressors, 2 air tanks, dual jars at multiple points, etc. First, I always piped the air intake into an air conditioned space so there was as little moisture as possible to start. I've designed and installed systems that ran 24/7/365.25 where even a single drop of water would cause intolerable damage (2" video tape machines running air bearing headwheels). I would put this directly off the compressor and have a drain on it but no fan. These can be reasonably cheap (half the price of a used dryer) and are on ebay every so often. I thought about making my own aftercooler using stainless steel or copper coils 3/4" 50' to 70' in length that come in compact round or rectangles shapes, etc. I know compressors can generate a ton of moisture, mine has an intercooler and aftercooler as part of the pump, but do I need further drying and if so what? A small refridgerated unit is not cheap and then you have running expenses. 5 micron filter feeding a similar large size 3 stage (oil,dirt and moisture) 0.01 micron with a regulator on each 3 stage. Probably two sets of 2 filters: a general large size. The compressor will have it's own shut-off and drain (auto or manual). The drops will have ball valve drains on the bottoms. One goes to to a retractable reel and two will have spring coil hoses. Probably a short 1" main pipe with 3 drops coming off the top of it. Puts out 16+ cfm at 175 psi and 17+ at 100 psi. I'm in the process of getting a 5hp, 2 stage, reciprocating compressor.
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