Want To Learn a Little About Automotive Spray Paint Guns - HVLP Spray Guns & Siphon Style Guns?
Here we go...
See, back in the day the most common paint guns used were all siphon style guns. You know, like the gun that was talked about in this video above with the cup actually below the spray nozzle. They worked great but they were not the most efficient guns in the market.
As time went on a new style of gun came out which was called the HVLP gravity feed gun. Gravity feed basically means (gravity pulls the paint down into the neck of the gun). The nozzle and air cap pressure ratios were reinvented to be very efficient using less paint and having much less over spray.