Schmidt AmphiBlast 120, Operation And Maintenance Manual

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Copyright © 2019 Axxiom Manufacturing, Inc.
7.5.14. With one hand grip the blast hose assembly (#10) and with the other hand press in the
deadman safety button. To begin blasting, aim the blast nozzle at the object to be
blasted, then firmly press down the deadman lever (#12). Air and blast abrasive will
flow into the blast hose and out of the blast nozzle (#11).
Do Not aim the blast nozzle towards yourself or any person. A system malfunction or a
blocked blast nozzle that clears can trigger accidental start up resulting in injury to
personnel.
7.5.15. Turn the blast air pressure regulator knob (#44) to set the blast pressure gauge
(#49) to the desired blasting pressure. See Section 5.17 for procedure.
7.5.16. Observe the blast stream and the coating removal rate. A bluish color in the blast stream
indicates a good abrasive to air mixture. Release the deadman lever to stop blasting.
7.5.17. If necessary adjust the abrasive flow with the knob on the Thompson® Valve (#14).
Turn clockwise for less abrasive flow, or turn counter-clockwise for more abrasive. Due
to the length of the blast hose there will be a slight delay in control of the abrasive flow
at the nozzle, therefore allow a few seconds before adjusting further.
7.5.18. Note the VPI® decal setting on the side of the Thompson Valve II cap to view the knob
position relative to the abrasive flow. The markings relative to the knob can be used as
reference when changing nozzle size or abrasive for different applications.
7.5.19. Re-test the blast air and abrasive mixture again on a test piece to determine if further
adjustment is needed. Release the deadman lever (#12) to stop blasting.
7.6 Beginning the Wet Blasting Operation
7.6.1. The abrasive blaster must be properly setup and all operating personnel must be
thoroughly trained before beginning the blast operation. All operators must completely
read and understand all sections of this manual before beginning the blast operation. See
the pre-operation procedures given in Section 6.0.
7.6.2. Perform the required inspections and maintenance before beginning the blast operation.
See the instructions given in Section 8.0.
The abrasive blaster is a Pressurized Vessel. Propelled objects will cause serious injury
or death. Depressurize vessel before performing any maintenance. See Section 6.2.
7.6.3. Open the abrasive shutoff valve (#54).
7.6.4. Open the choke valve (#13). Leave the choke valve completely open at all times while
blasting. Close the choke valve only for the “choke” procedure (see Section 11.3.2.). Do
Not blast for long periods with the choke valve partially closed since this will cause
excessive wear in the Thompson Valve (#14).
7.6.5. Switch the mode selector (#47) to “BLAST MODE”.
7.6.6. Turn the water “on” by pulling out the palm button on the water on/off palm button
control valve (#48).