How a Typical Pressure Pot Works?
1.Fill the pot with dry abrasive through the top (pop-up valve is down).
2.Close the exhaust valve and open the air inlet → vessel pressurizes → pop-up valve seals automatically.
3.Adjust the metering valve for desired abrasive flow.
4.Operator squeezes the deadman handle → air + abrasive flows through the blast hose and nozzle.
5.Release the handle or close valves → depressurize → pop-up drops for refilling.
Two main operating styles exist:
Pressure Hold — Pot stays pressurized between blasts (faster restarts).
Pressure Release — Pot depressurizes each time (safer for some applications).
Safety & Maintenance Notes:
Never exceed the vessel’s rated pressure.
Always use a functioning deadman control and proper PPE (helmet with supplied-air breathing, blast suit, gloves).
Drain moisture separator daily and use dry air.
Regularly inspect/replace pop-up valve, metering valve seats, gaskets, and blast hose (wear is rapid).
Use an abrasive screen when filling to avoid contamination.
These components are consistent across major brands (Schmidt, Clemco, Marco, Norton, etc.), though valve designs and exact part numbers vary. Replacement parts (valves, pop-ups, seals) are widely available from blasting equipment suppliers.