My understanding is screw and roots style compressors are best when you have near continuous duty. I've heard (hey it's a second hand anecdote so it must be true!) they don't like the start stop duty cycles piston pumps are happy to accept. Piston pumps don't have to be loud. A first step to deal with the noise is give them some type of muffler on the air intake.
Air Compressor for the Shop - New or Used, 40/60/80 Gallon?
- Thread starter bulletpruf
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bulletpruf
Well-known member
Just ordered it; should be delivered by Wednesday. Tractor Supply is only a few miles from my shop, so delivery was only $50.
alwaysFlOoReD
Well-known member
One of the things I've done is hook up a second compressor teed into the outlet of the main compressor. I didn't worry about pressures or duty cycles as it was just temporary. The larger portables put out about 5cfm.
alwaysFlOoReD
Well-known member
I had a 10hp 33cfm fall into my hands. I wish I had the amperage to run it at home. I sold it to an oil field company for $4,000.
I see a lot of 3 phase units selling fairly cheap on Marketplace probably because most people don't have 3 phase if you decide to consider used.
OP
bulletpruf
Well-known member
I thought about that, but the 3d leg of my 3 phase isn't hooked up yet and I've already got a 240v outlet where this one will be parked.
Wrench97
Well-known member
If only you knew a guy with a F350 and a trailer.......
finn
Well-known member
You can get a one way check valve to protect a lower psi rated tank from being overpressurized by a higher rated compresser when they are Tee’d together.
The lower rated compressor only kicks I when the big compressor can’t keep up.
Amazon has the check valves.
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drokihazan
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Anyone have any input on the California Air Tools 80gal 6hp 220v compressor, 80060C? Says it's only 24 amp peak draw, so conceivably I could run it on my 30a 220v circuit. Pretty appealing to get something with this much CFM but can run on singlephase 30amp AND only 76dB. I can't see a downside besides it costing about three thousand bucks.
My compressor would never hit 25 amps either if it maxed out at 120 psi
But seriously, just be sure that 120 max pressure works for you with line losses/pressure drop considered.
70chevellegsp
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- Jan 10, 2011
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I've had a few compressors over the years, a Craftsman direct drive for a few months. Loud, inefficient and returned. Bought a Sanborn 60 gallon single stage that lasted me 15 or so years. Found a used 80 gallon Champion R15B driving around town and bought it for $250. It lasted me 10 years or so, but 3 years ago, the tank had some leaks, so I stripped off the motor & head and scrapped the tank. Finding a replacement tank was almost as expensive as a new compressor. I ended up with a Emax E350 for $2.500. It's very quiet and pressure lubed and has been very good. I believe Emax, Polar, Eaton are the all manufactured in Ohio - I'm sure with some overseas parts. I keep my eyes out for a cheap used tank to revive the Champion compressor, but no success yet. This compressor is in my shop, but I also have a 1970's 20 gallon, 3 hp Montgomery Wards compressor that my dad and I used doing paint and bodywork on cars in the late '70's thru the '80s. He wasn't using it anymore so I plumbed it into my house garage. Pumps up quick and holds air forever. Back on topic, I think you made a good decision on the IR Compressor!
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bulletpruf
Well-known member
Delivered today and it's in place. It actually came with concrete anchors and insulators so I could bolt it in place, but I think I'll just use the pads that I sourced for it.
As for wiring it, the box to the right of the pump has 240 on a pair of 30A breakers. I think I'd like to put an outlet there so I can use a plug. Just might be helpful in the future if I can run something else on this outlet. Thoughts on this?
I also need to figure out what I'm going to run as a filter, dryer, and water separator and where to put this stuff.
As for wiring it, the box to the right of the pump has 240 on a pair of 30A breakers. I think I'd like to put an outlet there so I can use a plug. Just might be helpful in the future if I can run something else on this outlet. Thoughts on this?
I also need to figure out what I'm going to run as a filter, dryer, and water separator and where to put this stuff.
Wrench97
Well-known member
I like my compressors hard wired to a motor start relay that way I can run a remote off on switch(with a light in it) next to the man door.
mike93lx
ALLIANCE MEMBER
5hp isn't OK on a plug. Needs to be hardwiredDelivered today and it's in place. It actually came with concrete anchors and insulators so I could bolt it in place, but I think I'll just use the pads that I sourced for it.
As for wiring it, the box to the right of the pump has 240 on a pair of 30A breakers. I think I'd like to put an outlet there so I can use a plug. Just might be helpful in the future if I can run something else on this outlet. Thoughts on this?
I also need to figure out what I'm going to run as a filter, dryer, and water separator and where to put this stuff.
micromind
Well-known member
I like non-moveable anything to be hardwired.
OP
bulletpruf
Well-known member
Ok, it's in and hard wired.
When I started it, it had a substantial air leak at the fitting for the drain. It was barely screwed in and didn't have any teflon tape on it. Got it snugged up with some tape and seems to seal fine.
Still need to set up my water trap, filter, hose, etc.
When I started it, it had a substantial air leak at the fitting for the drain. It was barely screwed in and didn't have any teflon tape on it. Got it snugged up with some tape and seems to seal fine.
Still need to set up my water trap, filter, hose, etc.