Operation
3A4802D
13
9.
Close the pot dump valve (J).
10. Open the fill/flush valve until water is above the
pop-up seal, then pull up on the pop-up handle to
pressurize the pot.
11. Close the fill/flush valve once the pot is pressurized.
NOTE: If using a non-pressurized water supply, fill
the pot with water while in BLAST mode or use an
external source.
12. Turn the selector valve to WASH until the pump
stops cycling to remove air from the wash tubing.
13. Turn the selector valve to BLAST.
14. Open the abrasive metering valve 1/4 turn.
15. Check the pot pressure gauge to ensure the pot is
pressurized. If the pot is not pressurized, pull up on
the pop-up handle while the pump is cycling.
16. Engage the blast control switch and set the blast air
pressure to the desired pressure.
17. Open the abrasive ball valve (M).
18. While blasting, set the abrasive metering valve (T)
until the desired performance is achieved.
NOTE: You may have to wait 1-2 minutes for the
abrasive material to reach the nozzle.
NOTE: Use a piece of test material similar to what
you will be blasting. Always start as gently as possi-
ble and then increase the blast force as necessary
to clean without doing any damage to the substrate.
Setting the Abrasive Metering
Valve
The abrasive metering valve should be opened in incre-
ments of 1/4 turn until desired performance is achieved.
The optimal turns open of the abrasive metering valve
depends on blast pressure, blast hose, and nozzle com-
bination. The lower the air flow, the less open the abra-
sive metering valve needs to be (see Blast Pressure vs.
Air Flow Charts on page ). A 0.5 in. (12.7 mm) blast
hose is required when air flow is less than 100 CFM
(2.83 m
3
/min).
If the blast hose spits or sputters, too much media is
being used for the given air flow through the system. To
increase air flow, either the abrasive metering valve
should be opened less, or a larger nozzle should be
used.
ti30732a
WLD
M
WLE
17R192A, December 2016. Original Instructions, this manual contains English. MM 3A4802
WLD
T
