If you compare that to paying $6/fill, you are saving maybe 50%. If you load your own cartridges, you might be able to knock about a buck to a buck & a half off of that. If you figure in a $600 valve kit every 500 hours, along with a quart or two of oil & a little time, that’s about $700/500 = $1.40 per hour or maybe $0.50-0.75 per fill. If you run a 120vac motor for 30 minutes at 30 amps, that’s 120 x 30 / 2 = not a big difference. Depending on where you live & what time of day you run the compressor, that might be anywhere from $0.11 - $0.60 at current prices that I am aware of. If you run a 13 amp 220 single phase motor for 20 minutes, that’s 13 x 220 / 3 = about 1Kwh. If we look at a $50 cartridge every 20 tanks, that comes out to $2.50 per fill. If you refill the cartridges yourself, the cost looks to be more like half of that, perhaps less. Cartridge prices vary, but for these little machine, $50 seems to be a common price point. Cartridges look to last about 20 fills of an AL80 tank on average, but that varies with temperature & humidity. Specific examples will need to be calculated with actual data pertaining to specific equipment, using specific filtration media, running on power at a specific cost, and a specified maintenance schedule.įor the 3-4cfm machines, the filter system seems to usually be a water separator, followed by a second canister with a cartridge inside. Now might be a prudent time to take a quick look at some math, pertaining to operational expenses.
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