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The kind of sand you choose will greatly influence the amount of time needed to clean a given surface area.
Sandblasting materials include silicon carbide, alumina, silica sand, bank sand and beach sand. However,
bank sand and beach sand, even if washed, will still contain shell, coral and organic materials. These absorb
moisture mush more readily than the other materials. As a result, the moisture in bank and beach sands
frequently causes plugging of the sand metering valve. If you elect to reuse sand, remember it does wear
out. The sharp edges become rounder, and are less effective. It's at that point you should replace the batch
of sand you're using.
1.
Check your abrasive to be sure it's dry, and won't clog the meter valve (18), sand outlet pipe (19), hose
(25), or other components.
2.
Put on the protective clothing.
3.
Turn the air supply valve (14) to the off (horizontal) position.
4.
Watch the pressure gauge (05) and make sure it reads zero pressure.
5.
Be sure to get enough into the tank to do the job at hand. But if this is a big job, fill the tank only ¾ full,
and reload as needed to finish the work.
TIP: if the humidity is 90-100%, at the water trap (12) won't be able to trap all of the moisture in a ¾ full
tank. Better to reduce the amount of abrasive, load more frequently, and empty the water trap more
often. This will reduce the possibility of clogging the bottom of the tank or the line.
6.
With the correct amount of abrasive in the tank, and close the gasket (01) than open the air supply
valve (14)
7.
Check for air leaks at the filler cap as you begin to pressurize the tank from the compressor.
1.
You should make every effort to protect your air compressor from any damage it may receive from
your sandblasting work. Your best option is to keep the compressor in a room separate from the
sandblaster, using a long hose to provide the PSI needed to do your work. A second choice is to keep
the compressor up wind from the sandblasting and the greater the distance between them, the better.
Other than that, you should continue standard maintenance procedures for the compressor.
2.
Some parts of the sandblaster will wear mush rapidly than others. The parts needing close attention
carry the air/abrasive mixture, starting with the sand hose (25), and going through the metal fittings,
the shut off gun.
3.
If air leaks develop in any of these parts, you should stop all work, and find what needs to be repaired
or replaced. When it's new, the sand hose (25) has 2 cord piles and the walls are ¼" think. As the
interior diameter is sandblasted, this wall becomes thinner and thinner. One way to inspect the hose
and other parts affected by blasting is to put on your protective clothing. Then pressurize the system
and close the nozzle shut off gun. Close your hand loosely around the hose and run it up and down
the hose across the fittings and nozzles. You'll be able to feel any leaks. You can also spot places in the
hose where the wall is getting very thin. These show up as blisters in the hose. If you find such a blister,
get a new hose immediately. If that blister breaks, the abrasive will come out of the side of the hose at
65 or more PSI.
2015-08-10
The Reference in Surface Treatment
AB R AS IVE S E LECTI O N
LOAD I N G AB R AS IVES I NTO TAN K
MAI NTE NAN C E
80PX Instruction manual & Parts
5
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