Jack_K
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At work I have to use a direct dive compressor standing right next to it and I hate it, they are so much louder.
- Thread starter Oldbanger
- Start date
J1nx
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Can you explain this please, you say ‘only’ but that seems a lot of power?
Ubique
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It's a typo - it's around 2.2kW for a 3HP motor, but as with most things, 'it depends', on variables to be an accurate rating.
In no particular order
Supply voltage
Volt drop under load of the final circuit
No. of poles in the motor.
Build quality of the motor
Friction losses
Temperature - ambient & motor/compressor block
Etc.
Etc.
In no particular order
Supply voltage
Volt drop under load of the final circuit
No. of poles in the motor.
Build quality of the motor
Friction losses
Temperature - ambient & motor/compressor block
Etc.
Etc.
brightspark
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a 3hp motor runs full load at about 12 amps but the starting current is about 50 amps they will run on a 13 amp plug most times but sometimes pop the fuse
brightspark
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a plug 13 amp fuse will run on well over its stated current https://www.pat-testing-training.net/articles/fuse-operation-characteristics.php
Other option if you need a lot of air & limited leccy supply is a compressor with a petrol engine. Some years ago i bought a big old American Industrial Equipment compressor with 3 cylinders W fashion, It had a Kohler command 6 air cooled petrol engine bolted onto it. It had an unloader in the tank to vent air once max pressure is reached, It runs up to 120psi very quickly & then farts off. I used it for fairing boats with the air file & it drove that easily.
Drank a lot of petrol though! It hasnt been used for years, think i need to run a test on the tank before i fire it up again.
Out of interest these AIE compressors were used in WW2 for salvage operations, one oil tanker that had been torpedoed several times but not sunk basically sailed across the atlantic with most of its bottom blown out to a repair yard with a bank of compressors filling the tanks with air continuously. Heaviest hovercraft ever!
Drank a lot of petrol though! It hasnt been used for years, think i need to run a test on the tank before i fire it up again.
Out of interest these AIE compressors were used in WW2 for salvage operations, one oil tanker that had been torpedoed several times but not sunk basically sailed across the atlantic with most of its bottom blown out to a repair yard with a bank of compressors filling the tanks with air continuously. Heaviest hovercraft ever!
I plan on using hvlp gun and air tools like my sander, saw and angle grinder.
The clarke industrial range seem to have pretty good reviews from long term users and I've got a machine mart close by so I'm leaning towards these units. They offer a 200l 3hp unit that I can run from my mains (have to wire up a 30a output) it's less than 1k and they run a 10 % Discount from time to time.
I think that this would be as big as I could manage in my current workspace.
Until now I've used a friends unit for painting and electric power tools, but I'd like to be a bit more self sufficient and not rely on mates good nature.
Thanks for the heads up but unfortunately the industrial range of clarke stuff is never part of this offer (so I'm told)
This is the model that I think I'll end up buying unless otherwise advised
James1979
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Just to throw a spanner in the works have you considered ABAC?
Comparable price if not a bit cheaper but I think better quality
Not really looked into them mate. I'll have a look and see what's available
Are parts easy enough to get if needed+
James1979
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- Orkney
Yes. Lots of dealers. More so than the Clarke stuff I think.
They’re not exactly industry standard but a lot of small / medium workshops have them.
I think they bought compair.
The pumps are much the same as my compair.
When this dies I’ll go ABAC.
@xtreme engineering sells them I believe
Its has a higher calculated cfm but as already stated this means very little. Thanks for your input so far... It seems that the search continues
Farside
Badly Welded Man
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Only the usual noddy.
He must need burped, or something.
AVI_8
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I’ve mentioned this before, Buying new is great in that it’s new and you’ve got a warranty, and if you’re happy spending circa £900 on a compressor then go for it.
I look to reduce costs somewhat, got both of these for £300, one needed a new motor, so it’s around £440 in total
But I’ve 6HP and 28cfm displacement and around 18cfm FAD, and 300L capacity, I’m building a housing outside as they’re quite large. The advantage of buying second hand Clarke air industrial is that parts are available, if I’d bought new I’d be in for around £1500, my needs are for a blast cabinet and a spray gun and air fed mask, don’t think even with both of those would work with an HVLP gun and mask through, for that you’d be looking at a big 3 phase thumper unless it’s just a few panels.
Personally if I was buying new I’d look at getting 2 of what @Burdekin suggested value for money wise you can’t beat it.
Edited to say that a conventional gun at around 10 CFM as opposed to around 15 CFM for an hvlp gun, this setup should respray a full car with air fed mask.
FAD is around 2/3 rds of piston displacement (scfm) for most air compressors
I look to reduce costs somewhat, got both of these for £300, one needed a new motor, so it’s around £440 in total
But I’ve 6HP and 28cfm displacement and around 18cfm FAD, and 300L capacity, I’m building a housing outside as they’re quite large. The advantage of buying second hand Clarke air industrial is that parts are available, if I’d bought new I’d be in for around £1500, my needs are for a blast cabinet and a spray gun and air fed mask, don’t think even with both of those would work with an HVLP gun and mask through, for that you’d be looking at a big 3 phase thumper unless it’s just a few panels.
Personally if I was buying new I’d look at getting 2 of what @Burdekin suggested value for money wise you can’t beat it.
Edited to say that a conventional gun at around 10 CFM as opposed to around 15 CFM for an hvlp gun, this setup should respray a full car with air fed mask.
FAD is around 2/3 rds of piston displacement (scfm) for most air compressors
JOEPRO
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What sort of housing are you going to go for?
I was thinking of the same but it is a tricky balance. Reason being the compressors will require air flow and also to dissipate heat from running.
In a small enclosure this presents problems because even if using acoustic louvres (cost prohibitive) they are also letting the damp outside atmosphere in when not running. And if near neighbouring properties noise could be an issue. Hence I put my compressor in my garage attic.
AVI_8
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I tried to get one of those Joe, they’re hard to come by, and seriously expensive even second hand I was seeing £900, put it this way I’ve been looking for one locally for over 2 years.
These pumps start one at a time, when the first has started the second one starts, so it’s fine through a 32 amp plug. Sequential starting, When I first started looking at these 2 years ago you could get one for under a grand brand new, oh how inflation has made a difference! They’re around if a minimum of £1500 now
These pumps start one at a time, when the first has started the second one starts, so it’s fine through a 32 amp plug. Sequential starting, When I first started looking at these 2 years ago you could get one for under a grand brand new, oh how inflation has made a difference! They’re around if a minimum of £1500 now
