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Saved by uncleflo on April 3rd, 2021.
On the left is my excellent Preval vFan airbrush that Home Depot gave me to evaluate. You can see the hose has a standard 1/4″ male QD connector installed. On the right is a pressure regulator, with a standard female QD connector on the outlet side, and a scuba-to-NPT adapter on the inlet side. Plug that into an inflator hose on a scuba regulator, and set your output pressure on the inline regulator. A scuba regulator outputs about 140 psi, roughly the same as a compressor, while the airbrush wants 20-40 psi. The flow rate is more than adequate to drive the airbrush, and breathing air is already super-clean, so no filter necessary. A typical scuba tank holds 80-100 cuft at around 3000 psi, and costs well under $10 to refill at the dive shop. The vFan spec is 5 cfm at 20 psi, which works out to over 15 minutes of continual spraying, or several hours under real conditions. This could even drive a bigger spray gun for a useful amount of time, but I don’t think I will ever use it for anything but the airbrush, since Home Depot also gave me a nice compressor. It’s like Christmas every month.
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