I have to replace my portable 12 volt dry Air compressor, any recommendations.
Regards Bowser.
Bryan said
12:03 PM Dec 21, 2019
bowser wrote:
Afternoon everybody.
I have to replace my portable 12 volt dry Air compressor, any recommendations.
Regards Bowser.
I bought an ARB about 6 years ago. Had no trouble and pumps each tyre from 15 to 38 PSI in 90 seconds. No overheating after pumping all four tyres. I use it at least three times a month after beach fishing.
Its a little more expensive than the run of the mill models and if you plan on using it often its the way to go. If usage is rare and occasional then I suggest a less expensive unit from Super Cheap or similar will do the job.
Had cause to replace mine recently. Bought a twin pot one from 4WD Supercentre. Works well and very fast. If you have a store near you get it there rather than online...cheaper. Have only used it t re-inflate after a run on dirt so can't comment on its longevity.
Had an ARB one (the one in a toolbox with a mini tank on it) yonks ago but it carked it so expensive doesn't mean fail proof. Since I use don't use one extensively I figured a cheaper one would suffice.
Whenarewethere said
01:16 PM Dec 21, 2019
I have three ARB, but it was mainly about fitting them in a space. 4 litre air tank, moisture trap, additional heat sinks & fan cooling. In the process of installing an after cooler.
Work out what duty cycle you are prepared to be patient with.
You make the nicest graphs ... Full of great info too.
Edit .. What software do you use?
-- Edited by Cupie on Saturday 21st of December 2019 02:12:57 PM
bowser said
02:43 PM Dec 21, 2019
Thanks everyone I might end up at supercheap.
Whenarewethere said
05:53 PM Dec 21, 2019
The graph is from ARB. I haven't been able to find worthwhile information from other manufacturers. ARB do provided reasonable figures as a starting point.
Manufacturers should be stating SCFM (standard cubic feet per minute), CFM is a meaningless statement as it is with zero pressure or in other words 1 atmosphere which is a bit useless!
Same as a "150" psi compressor, but at zero flow!
Ideally you want CFM at 90 psi at 21°C. Something meaningful.
Also as a rough guide, for every connector & every metre of air hose subtract 1% of the compressor's capacity. May as well factor in electrical cable length as well, as they always undersize cable.
Whenarewethere said
07:29 PM Dec 21, 2019
If you want your compressor to work & avoid Murphy striking! Do not use it longer than its duty cycle, which will be for a 21°C day.
As a bit of a back of an envelope guess I would reduce a compressor's duty cycle by 2% for every degree above 21°C.
Afternoon everybody.
I have to replace my portable 12 volt dry Air compressor, any recommendations.
Regards Bowser.
I bought an ARB about 6 years ago. Had no trouble and pumps each tyre from 15 to 38 PSI in 90 seconds. No overheating after pumping all four tyres. I use it at least three times a month after beach fishing.
Its a little more expensive than the run of the mill models and if you plan on using it often its the way to go. If usage is rare and occasional then I suggest a less expensive unit from Super Cheap or similar will do the job.
Had cause to replace mine recently. Bought a twin pot one from 4WD Supercentre. Works well and very fast. If you have a store near you get it there rather than online...cheaper. Have only used it t re-inflate after a run on dirt so can't comment on its longevity.
Had an ARB one (the one in a toolbox with a mini tank on it) yonks ago but it carked it so expensive doesn't mean fail proof. Since I use don't use one extensively I figured a cheaper one would suffice.
I have three ARB, but it was mainly about fitting them in a space. 4 litre air tank, moisture trap, additional heat sinks & fan cooling. In the process of installing an after cooler.
Work out what duty cycle you are prepared to be patient with.
Jonathon ....
You make the nicest graphs ... Full of great info too.
Edit .. What software do you use?
-- Edited by Cupie on Saturday 21st of December 2019 02:12:57 PM
Thanks everyone I might end up at supercheap.
The graph is from ARB. I haven't been able to find worthwhile information from other manufacturers. ARB do provided reasonable figures as a starting point.
Manufacturers should be stating SCFM (standard cubic feet per minute), CFM is a meaningless statement as it is with zero pressure or in other words 1 atmosphere which is a bit useless!
Same as a "150" psi compressor, but at zero flow!
Ideally you want CFM at 90 psi at 21°C. Something meaningful.
Also as a rough guide, for every connector & every metre of air hose subtract 1% of the compressor's capacity. May as well factor in electrical cable length as well, as they always undersize cable.
If you want your compressor to work & avoid Murphy striking! Do not use it longer than its duty cycle, which will be for a 21°C day.
As a bit of a back of an envelope guess I would reduce a compressor's duty cycle by 2% for every degree above 21°C.
I bought an Atomic clock (AA Batteries) on Evil Bay https://www.ebay.com.au/itm/Atomic-Digital-Wall-Clock-Large-Lcd-Display-Battery-Operated-Indoor-
-- Edited by Possum3 on Thursday 26th of December 2019 04:24:37 PM
Don't buy one that was made before 1910,they are unreliable,so I have been told