Metalworks CAT020RA Manual De Instrucciones página 12

5. Refer to the drawing for step 6, for connecting the sand metering valve assembly (step 4). Slide the two
hose clamps (26), over each end of the sand hose (25). Press one end of the hose, over the nipple on the
sand outlet pipe (19) and the other end over the adapter (27). Both hose ends should be firmly seated on
the nipples. Slide the hose clamps along the hose to each nipple and tighten the clamps very firmly. They
have to resist the force of 4,5 to 8,6 bar.
6. Fasten the handlebars (02) to the tank using pan screws (11) and washers (10) and hex nuts (09), fixing
axle foods (20) on the tank using the screws (16).
Note: keep the handle curve ends upward,
7. Locate the axle (23) and slide it through the holes in the skies of the axle foods (20). Place one wheel (22)
at each end of the axle and fasten them into place with cotter pins (24) and washer (21).
8. Insert the fixed foot (17) onto the fitting on the bottom of the tank near the edge. Use your last cotter pin
(24) to hold the foot to the tank.
9. Before beginning operations, go back over each connection, double checking to ensure that all are tight
and properly seated.
Abrasive selection
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 much 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.
Loading abrasives into the tank
1. Check your abrasive to be sure it's dry, and won't clog the metering 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. Watch the pressure gauge (05) and make
sure it reads zero pressure.
4. Insert the funnel and pour the abrasive into the funnel. 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 3/4 full, and reload as needed to finish the work.
TIP: if the humidity is 90-100%, the water trap (12) won't be able to trap all of the moisture in a 3/4 full
tank. Better to reduce the amount of abrasive, load more frequently, and empty the water trap more open.
This will reduce the possibility of clogging the bottom of the tank or the line.
5. With the correct amount of abrasive in the tanks and close the gasket (01) than open the air supply valve
(14).
6. Check for air leaks at the filler cap as you begin to pressurize the tank from the compressor.
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CAT020RA - NLFRENES - v1.0 - 30082013
EN