Silent air compressor
- Thread starter Sumboodie
- Start date
MacMcMacmac
Well-known member
Jun-Air
I believe Jun-Air are based on refrigeration type compressors. I don't think you will find something that is quieter. CAT and similar brands may be quiet enough but if this is something that you expect to last for many years I would feel better about a Jun-Air than a oil free CAT compressor.
Firebrick43
Well-known member
Videos, especially cell, phone videos can be quite misleading.
I am not finding a 12-50 but 12-40(60decibles)or a 18-40(50decibles).
60 decibels is a normal conversation, 50 moderate rain fall.
Cal air tools, another common brand has a 60 decibel rating for those continuous industrial models.
Build a cooled and insulated cabinet for the compressor or put it outside if that is to loud.
Thinking about it, but in the warmth is better. I used to have a 60 gallon out in my shed, it would trip the breaker when it was -20*
Jun-Air is a brand. They offer many oil lubed and oil free compressors. That said, I think what many people think about when they see/hear Jun-Air are their small, oil-lubed compressors which are indeed, very quiet. That said, they have pretty low output and are outrageously expensive.
The OP didn't say how much air they need or how much they are willing to spend, so we probably need a little more info to work with.
Firebrick43
Well-known member
Again enclose it and insulate. Just make the air circulation so it can be blocked off on the winter and place an 120v oil pan heater on it.
But you can always build a small enclosure inside.
That'd be expensive to run. Even a small 500w one would be $70 a month, which is more than my usual bill.
Firebrick43
Well-known member
500 w heater is gargantuan for a pump on and air compressor, especially one in an insulated enclosure as the pump running is going to make some heat. And the insulation retains it. A 25 watt heater would be sufficient.
A thermostatic outlet in the enclosure would only turn it on if inside of the enclosure fell below freezing.
the oxygen concentrator pump based ones may be the ticket. The jun-air and others based on fridge units are spendy (unless you diy w/fridge units).
California air perhaps has what you need (look for dental units, some have soundproof cabs). HF has a quiet 26 gallon @ 70db
www.harborfreight.com
A tip, much silencing can be achieved by swapping the inlet muffler:
California air perhaps has what you need (look for dental units, some have soundproof cabs). HF has a quiet 26 gallon @ 70db
Husky 20 Gal.165 PSI Vertical Electric Oil-Free Quiet Auto/Workshop Air Compressor with Dual Gauges and 2-Quick Couplers 3332013 - The Home Depot
Finish your sanding and painting work easily with the selection of this Husky 2-Vertical ElectricPowered Silent Air Compressor.
www.homedepot.com
10 Gallon, 175 PSI Ultra-Quiet Horizontal Shop/Auto Air Compressor
Amazing deals on this 10Gal 175Psi Horizontal Compressor at Harbor Freight. Quality tools & low prices.
www.harborfreight.com
A tip, much silencing can be achieved by swapping the inlet muffler:
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mike93lx
ALLIANCE MEMBER
Wow, thats a lot more air and much higher pressure than I would have guessed.
Any way to do it with a blower or is 70psi critical?
Any way to do it with a blower or is 70psi critical?
Sorry, I swear I checked and I saw the 70 psi but didn't see the flow specified.
Anyhow, can we assume you don't want to spend $5,000+ on a Jun-Air? If not, there are lots of little oilless compressors that will make around 5 cfm that are rated at or under 70 db. On the cheaper end is this harbor freight fortress compressor. There's a coupon for $40 off right now making it even cheaper.
As ching mentioned above, there are several California Air Tools 2HP models that will make 5cfm for between $400 and $500, depending on the tank size/material you want.
Is this quiet enough?
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It's what blasts the oil into the burn chamber.
Sort of looking at a scroll compressor.
Haven't decided if I want to do a little compressor for the boiler and the loud piston compressor I already have for shop air or a scroll for everything.
Around $3000 to my door, so not cheap.
Haha, that's a whole different thread topic!
When the boiler is running, so 10-12hrs a day when it's cold.
mike93lx
ALLIANCE MEMBER
Wow. That's going to be expensive to run but guessing cheaper overall than something like propane.
Curious, how many gpm are you putting through the burner?
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Yeah, I don't know if any of the above will like 100% duty cycle. Some of those twin cylinder belt driven ones can be fairly quiet and likely OK for continuous being oil filled.
This thing's just got a muffler attached to it
looks like the ticket is bigger "low rpm pump" and muffler:
5 HP Air Compressors Archives
5 HP Air Compressors. Eaton Compressor carries a wide variety of rotary screw and piston air compressors with the best warranty in the business.
eatoncompressor.com
claims 62db:
If you look at the manual for the emax you can see how the muffler box is made. Nothing special other than they actually did it. A DIY option wouldn't be hard for someone who can cobble together a plywood box. The lower RPM does help but I think the biggest impact is simply creating what amounts to an intake muffler. Most compressors just don't bother.Yeah, I don't know if any of the above will like 100% duty cycle. Some of those twin cylinder belt driven ones can be fairly quiet and likely OK for continuous being oil filled.
This thing's just got a muffler attached to it
looks like the ticket is bigger "low rpm pump" and muffler:
5 HP Air Compressors Archives
5 HP Air Compressors. Eaton Compressor carries a wide variety of rotary screw and piston air compressors with the best warranty in the business.
claims 62db:
yup. I do think reducing RPM while oversizing the pump in order to hit your CFM target is also a good strategy. HF has a 1k rpm pump head so makes me wonder
. They also have a 75db vtwin compressor but pretty much every big box store does.The flexzilla silencer....a fair bit simpler than a glass packed car muffler.
this guy used a car air box:
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Wamsutta
Well-known member
That's what I was going to recommend if you want something quiet.
No suggestions on a compressor and excuse my ignorance on waste oil burners.
Why can't you use a liquid pump to pressurize the oil and atomize through a nozzle like a typical burner?
Dunno, they don't work like that to my knowledge.
Some have built in compressors, many don't.
seber
Well-known member
I believe waste oil needs a lot more air than just ambient in order to get any real heat.
Hello everyone. I wish to introduce myself here at the Garage Journal Forums. I'm Nigel/LEGIN27. I'm a part time graphic artist who has been painting drawing since I was a kid. And airbrushing off and on for over 30yrs. Last year 2023 I began dusting off my airbrush equipment and purchasing some new airbrush equipment to start back airbrush painting and that has gone surprisingly well. I have vast knowledge of airbrush painting, airbrush equipment to include airbrush types, brand types, compressors, primarily silent compressor for which I own a few. I'm also the author of a few online JUN-AIR compressor videos. One of which is listed in this thread posted last year as part of the spoken topic in this thread. Anyway....HELLLLOOO EVERYONE!!! I look forward to chopping it up with guys and gals.
