The blast spray pattern is sputtering or irregular.

  • Make sure the air compressor is capable of supplying the minimum air flow requirement for your system (see Technical Specifications, in manual).
  • Make sure the air inlet pressure gauge reads 100-150 psi (6.8–10.3 bar, 0.68–1.03 MPa).
  • If the gauge does not read 100-150 psi, check the air compressor for proper setup (consult your air compressor manual, see Related Manuals, in manual).
  • Make sure the air inlet filters are clean and replace if necessary.
  • When you have finished blasting, perform wash until all of the abrasive is flushed from the blast hose (see Using the Wash Feature, page 16).
  • Turn the selector valve to OFF, and with the abrasive ball valve closed, continue to blast until all water is cleared from the hose. This is to dry the inside of the hose for storage.
  • Perform Pressure Relief Procedure.
  • Close the abrasive ball valve.
  • Close the compressor supply air valve, then turn the compressor off.
  • Make sure the supply pressure gauge reads 0
  • psi, then close the air supply valve.
  • Disconnect the system air inlet hose.
  • Turn the selector valve to OFF.
  • Close the fill/flush valve and disconnect the pressurized water supply.
  • Open the pot dump valve until the pot pressure gauge reads 0 psi.
  • Connect to a water supply.
  • Close the abrasive ball valve.
  • Turn the selector valve to OFF.
  • Open the air supply valve.
    • NOTE: The system will not work unless the air supply valve is open.
  • Fill the pot with water. Use the fill/flush valve or an external source.
  • Open the pot dump valve.
  • Add abrasive material (see Technical Specifications, in manual for capacity information).
  • Close the pot dump valve.
  • 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.
  • 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.
  • Turn the selector valve to WASH until the pump stops cycling to remove air from the wash tubing.
  • Turn the selector valve to BLAST.
  • Open the abrasive metering valve 1/4 turn.
  • 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.
  • Engage the blast control switch and set the blast air pressure to the desired pressure.
  • Open the abrasive ball valve.
  • While blasting, set the abrasive metering valve until the desired production is achieved.
    • NOTE: You may have to wait 1-2 minutes for the abrasive material to reach the nozzle.
  • Close the abrasive ball valve.
  • Turn the selector valve to OFF.
  • Open the pot dump valve to drain water from the pot.
    • NOTE: Be prepared to capture the water that will be drained from the pot. All disposals must comply with national, state, and local regulations.
  • Add the abrasive (see Technical Specifications, in manual for capacity information).
  • Close the pot dump valve.
  • 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.
  • 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.
  • Turn the selector valve to WASH until the pump stops cycling to remove air from the wash tubing.
  • Turn the selector valve to BLAST.
  • Open the abrasive metering valve 1/4 turn.
  • 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.
  • Engage the blast control switch and set the blast air pressure to the desired pressure.
  • Open the abrasive ball valve.
  • While blasting, set the abrasive metering valve until the desired production is achieved.
    • NOTE: You may have to wait 1-2 minutes for the abrasive material to reach the nozzle.
  • Remove the nozzle and inspect for blockage, buildup, or damage.
  • Replace if necessary.
  • Perform Draining the Pot procedure (in manual) to remove as much media and water as possible.
  • Perform Pressure Relief Procedure, in manual.
  • Disconnect the abrasive hose at the control box, and disconnect the blast hose. Shine a flashlight in through the blast outlet connection. Inspect the interior of the pinch hose and blast circuit outlet for debris. If debris or packed-out media is found, remove then reinstall the blast hose and abrasive hose and resume blasting.
  • Remove the pot funnel assembly to gain access to the inside of the pot.
  • If visible, remove large debris and proceed to step 11, If water and media still remain in the pot and no debris is visible, proceed to step 6.
  • Remove the abrasive hose from the control box and pot at the cam-lock fittings. If media flows freely from the pot, debris is stuck in the abrasive hose. Clear the hose and reinstall.
  • If media is still stuck in the pot, loosen the clamp to remove the outlet manifold.
  • Probe inside the pot from the outlet until the debris is found.
  • Remove debris, inspect the gasket and replace if damaged. Reinstall the outlet manifold and torque the clamp to 15 ft-lb (19.5 N•m).
    • NOTE: When debris is cleared, media should freely flow from the pot outlet. The pot will need to be completely flushed before the outlet manifold can be reinstalled. All disposals must comply with national, state and local regulations.
  • Connect the abrasive hose at the cam-lock connections.
  • Inspect the post funnel assembly gaskets and replace if necessary. Reinstall the pot funnel assembly.
  • Close the fill/flush valve.