For standard efficiency and productivity our experience tells us that a minimum of 100 psi is needed coming out at the nozzle. Each drop of 1 psi causes a corresponding drop of 1.5% in blasting speed. Many blasters read the compressor gauge and believe that to be their actual blasting pressure; which is totally false in nearly every single case we’ve examined.
The Proper Way To Test Your Blast Pressure
With a BlastOne Pressure Gauge Kit, you can simply measure your blasting pressure. While the abrasive flow is open follow these 3 simple steps:
Insert hypodermic needle onto nipple at the bottom of the gauge.
Slowly insert the needle into the rubber hose a few inches back from the nozzle holder. Aim the needle toward the end of the nozzle, at a slight angle. Insert slowly until you get a constant reading. Are you getting 100psi?
Record reading and remove needle. Pack away for next time.
The Pressure Test Kit is great for checking your entire system set-up
Where are losing pressure from the compressor to the nozzle? Below are two hotspots to measure to accurately diagnose where you’re losing pressure.
Always insert the needle at an angle in line with the direction of the air flow. Not against the air stream.
On long hoses, test the pressure at both ends – you’ll be shocked to see how much pressure drops just running the length of a hose!
We recommend two kits to simultaneously test air going into your blast pot versus air pressure exiting the pot. Significant pressure loss is most likely due to equipment and/or accessory leaks, or issues with your compressor.