What's the CFM math in that?
Stop in for a cup of coffee
- Thread starter toolmanmike
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What's the CFM math in that?
Unconventional
Well-Known Member
The big air consumer was the Bag House/dust collector/vacuum cleaner for the plant. 350 - 7" x 15' filter bags in rows of 10. Collecting the dust from the plant and supplying 70% the combustion air for the burner/dryer. 250 horse driving a fan 3' w x 6' d for the vacuum. Each row had a 1 1/4" pipe with 10 3/8" holes centered over the filter bags below to knock the dust off the bags so it could be returned for use in the AC and continue to supply that necessary vacuum. Every 15 seconds 7 of those 1 1/4" valves opened for about 5 seconds.
Woah!
Set it up to trap moisture if anything.
Patches patches and more patches. I need my bead roller for one patch. So i dragged it out so i can grab it with the tractor.
Unconventional
Well-Known Member
Unless there was an obvious dust leak in the exhaust stack, 3 times/yr was inspection time. Start the Bag House, take the powdered dye and add it to the dirty side of the vacuum air flow, shut it down and suit up for crawling over those 35 rows of bags and pipes with a black light in hand in the dark looking for any evidence of that dye and it's origin 
. The clean side was 12' x 70' x 2 1/2', that was the crawling space. Luckily only 1/2 of the 70' was necessary for the filter bags 
. The remainder had to be inspected too in case a leak had developed due to wear or breakage issues, but there were no pipes to crawl over in that end . My part of saving the environment from pollution . Did I mention burning about 225 gal/hr of diesel on a busy production day? 
. The clean side was 12' x 70' x 2 1/2', that was the crawling space. Luckily only 1/2 of the 70' was necessary for the filter bags . The remainder had to be inspected too in case a leak had developed due to wear or breakage issues, but there were no pipes to crawl over in that end . My part of saving the environment from pollution . Did I mention burning about 225 gal/hr of diesel on a busy production day? 
dukeboy440
Well-Known Member
CFM from the compressor would remain unchanged, tank CFM though would change
dukeboy440
Well-Known Member
Have multiple of those built in already
Cfm delivered @ *** psi is the output. You can have 1000 gallons if air storage but if the tool uses more than the compressor can put out, sooner or later you will run out.
My thought is if tank volume is a variable in CFM calculation, introducing the additional volume with the same size motor can reduce realized CFM at pressure "X" when using the tool.... ???++
Or... I'm not fully understanding your configuration Chris.
zkx14
Duster De-ruster
I applied for a maintenance manager job at a foundry a few years ago. Made really cool stuff brass and bronze- A lot of one off statues and things. (Good I didn't get it cause they were bought out and as far as I know that facility is closed now) Don't know the numbers on it, but they had a huge filter bag system like that.
dukeboy440
Well-Known Member
Well true . But adding a tank shouldn’t alter the compressor CFM. The CFM of this compressor is 18.4 @ 90psi.
dukeboy440
Well-Known Member
There’s two CFMs on air systems to consider. Compressor CFM and system CFM.
dukeboy440
Well-Known Member
The system cfm is restricted to the size of the opening and fittings. If you open the large clean out on the tank, the cfm that escapes through that opening is huge compared to what goes through a coupler fittings or the nozzle of a blow gun. Air in the system is relative to pressure, storage capacity and the cfm of air the tool uses. The compressor is limited to pressure only and CFM delivered by design. It can only make so much compressed air and is limited by the pressure switches within the limits of the design. CFM is just the measurement of air used. You can't make more air than the compressor can put out pressure wise and you can't deliver any more than the hose and fittings can deliver. Adding a extra tank will increase capacity but not the CFM delivered by the compressor or the cfm exiting the hose through the fittings. If it takes 5 min to fill a 80 gallon compressor to 100 # it should take that same compressor 10 min to fill 2 80 gallon tanks. It will take you twice as long to empty 2 tanks over just 1 but it will take twice as long to fill 2 tanks up as well. And like I said earlier, if the air tool or blast cabinet uses more air (CFM) than the compressor can put out you will eventually run out. Time to crack open a beer and let it catch up.
Wut up yall?
Unconventional
Well-Known Member
Conversation has gone from weeding to getting blown with a few minor detours along the way
. Wuzzzzup
Sounds about normal. lolConversation has gone from weeding to getting blown with a few minor detours along the way
Well stated. AND IMO, the larger the connection between the two tanks the better. Just my thoughts.... Less restriction, less heat,
dukeboy440
Well-Known Member
Correct. Which is what I want. The compressor runs the same amount of time overall, but has longer periods between cycles.
More tank capacity = longer run time to get set pressure. But longer down time. I do not think it is equal... Linier
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Holy crap, stopped at farmer bar by our grain elevator for blue plate lunch special (ham and cheese sandwich with potato salad) and a corona. 14 bucks. I about had kittens.
dukeboy440
Well-Known Member
Which is still good enough.
Well I pulled that widow maker down, damn alder never does what I think it's going to do. Still 3 branches up there stuck in the tree, winds coming, maybe it will help lol!
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