MW TOOLS CAT420 Mode D'emploi page 16

TOOLS
4. Media
Use quality blast media sized to the job. Damp or dirty media can bring blasting to an instant halt. Store media in
a dry area and load the appropriate quantity. Add enough media through the flooring to have 6"/15 cm deep of
media on top of the metering valve. If you run out of media as you are blasting, add enough so it keeps circulating to
the gun. The media will eventually break down or get too contaminated to use. The less there is in the system, the less
you will have to replace.
5. Media delivery
Replace any media hose that has soft spots or visible wear. Adjust the metering valve to provide adequate flow. A
mixture that is too rich will cause pulsating at the gun. An unusually loud noise while blasting means the mixture is
too lean. A rich mixture can result in lower impact velocities, while a lean mixture reduces the number of impacts.
Both reduce your cleaning rate.
If everything is adjusted right and you are still not getting the production levels needed, contact your distributor. The
suction system may be operating properly, it may be time to get a cabinet with a media reclaimed or a pressure system.
Many upgrades are available.
6 Air requirements
Supply air pipe size in inches
Line
Length
25
25 0.75 0.75
50 0.75 0.75
75 0.75 0.75
100 0.75 0.75
150 0.75
200 1
250 1
300 1
Spare parts: see page 17-19.
Volume of air through pipe (cfm)
30 35 40
0.75 0.75
0.75 1
1 1
1 1
1 1 1
1 1 1
1 1 1
1 1 1
50 60 70
1 1 1
1 1 1
1 1 1
1 1 1.25
1 1.25 1.25
1 1.25 1.25
1 1.25 1.25
1 1.25 1.25
16
M1.2.CAT420.NLFREN 24092018
80 100 125
1.25 1.25 1.25
1.25 1.25 1.25
1.25 1.25 1.25
1.25 1.25 1.25
1.5 1.5 1.5
1.5 1.5 1.5
1.5 1.5 1.5
1.5 1.5 1.5
EN