I sold sandblasting equipment at one time, from the little to the huge and
seem to remember a tad. Careful consideration must be given to the nozzle
size and air consumption.
A 1/16 nozzle uses 4 cfm @ 60PSI -- and 5cfm@ 70psi which a 2hp
compressor should handle. However a 3/32" nozzle uses 9CFM and 11cfm
respectively and a 1/8" , 17cfm and 19cfm. The consumption really goes up
if the pressure is set higher, for example a 3/32" nozzle uses 15cfm @
100psi. It is possible to have a good sized receiver (tank) which will
help to some degree where short blasts can be used and pressure maintained,
probably quite adequate for the small pieces we sandblast. If you are
buying a small compressor, check the actual delivery ratings, not just the
horsepower. A receiver of some kind is always advisable. 30 gallon at
least, I would suggest.
As with painting, moisture can be a problem, especially in an area of high
humidity. An aftercooler and even a dryer is the best but an unrealistic
expense for us hobbyists. A small moisture trap should work fine but it
must be installed as far from the compressor as is practical and as close
to the outlet where the operated equipment is being used. Another trick is
to have several coils of copper tube in the line (the compressor side of
the trap) as that will give some condensation ( like an aftercooler) for
the trap to trap! The ID of the copper line should be large or there will
be a pressure drop.
One note, pvc pipe should NOT be used, no matter what the pressure rating
is as that rating is for liquid and pvc can cause very serious injuries if
the pipe is carrying air and should fracture. In my experience, several
plants removed all the pvc piping after being advised--and dam, I didn't
sell steel or copper piping!! I did get a lot of dirty looks from plant
engineers!
Geoff.
In my former hobby life, I had a blast booth that would hold a Car door. I
have seen many media from J.C.Whitney. They had everything from walnut
shells to Silicon Carbide. They were my source for blasting materials.
>
>Terry
>
>-Original Message-
>From: ODH_REMOTE.GWIA."[EMAIL PROTECTED]"
>Sent: Sunday, September 19, 2004 12:27 AM
>To: [EMAIL PROTECTED]; [EMAIL PROTECTED]
>Subject: Re: priming
>
>At 10:10 PM 9/18/04 -0600, you wrote:
>>I just picked up a sandblaster at a yard sale, so I'm eager to try that
>>-vance-
>
>Vance,
> I've had a small cannister (aka crappy) sandblaster for years and not
>long ago acquired a large cabinet unit, and I finally got some real
>blasting abrasive (vs Home Depot play sand) and it is superior to common sand.
>
>Regards,
>Harry
>
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>
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