The pot will not properly pressurize

Make sure the air inlet pressure gauge reads 100-125 psi (6.8-8.6 bar, 0.68-0.86 MPa). If the gauge does not read 100-125 psi, check the air compressor for proper setup.

Disengage the Emergency Stop.

Make sure the water tank is full and the inlet ball valve is open.

Increase the setting on pot pressure regulator.

  • Try to push and quickly release the valve with your finger.  If that does not cause the valve to seal, open the dump valve to release all of the pressure in the pot.
  • Open the dump valve to relieve pot pressure.  Open the pop-up and drain the pot until the water level is below the pop-ip.
  • Turn the selector valve to RINSE.
  • Use the rinse hose to force water backwards into the valve stem.
  • If the prior steps fail to resolve the issue, replace the whole valve assembly.
  • Decrease the pot pressure to 145 psi (10.3 bar, 1.02 MPa) or less.  
  • If the valve weeps or relieves at 145 psi, replace valve.
  • Make sure the abrasive ball valve and the dump valve are closed. 
  • If put pressure gauge still creeps downward see following steps:
    • Open the dump valve.  Check pot pressure gauge, then close the dump valve.
    • Look at the pressure gauge to confirm that all pressure has been relieved from the pot.
    • Disconnect the tubing at the blast check valve and at the fill port check valve.
    • Make sure the pop-ip is engaged with its seal.  Turn the selector valve to WASH, then open the abrasive ball valve to pressurize the pot.  Set the pot pressure to 145 psi (9.9 bar, 0.99 MPa).
    • Check the water pump to confirm that no water is leaking from the TSL fill port.
    • The pump should stall after the pot pressurizes, if it does not, replace the seals in the pump.
    • Check for any water leaking from either check valve.  If a check valve is leaking, it must be repaired or replaced.  If the valve are damaged, the pot will not be able to maintain pressure.  Also, check the pot pressure relief valve.  If the valve is weeping at pot pressure of 145 psi or less, it needs to be replaced.
    • Close the abrasive ball valve, close the air inlet ball valve, then engage the blast control switch to relieve pressure in the blast circuit.  Confirm that the air supply pressure gauge reads 0 psi.
    • Disconnect the quick coupler and confirm that the ball valve is not leaking.  Replace the abrasive ball valve if it is leaking.

Replace the pot pressure regulator assembly.