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Before selecting a spray gun, you have to consider the air compressor you have.

HVLP guns require a lot of air volume. Air volume is measure in CFM (cubic feet/minute). It is not unusaul for a HVLP gun to require something in the range of 12-14 CFM. That's a lot of air and your standard garage style air compressors doesn't put out that much air.

About the lowest requirement in the HVLP spray gun field is the Sharpe Platinum LV. It requires 7.5 CFM @ 55 PSI.

The advantage to using a HLVP is less overspray. That means more of the product goes on and less product is put in the air. That equates into a cleaner work area and lower costs.

By the way, I have to agree with everyone. For a cheap HVLP primer gun, spending $50 at Harbor Freight is the way to go. Their gravity-fed HVLP works great with 2K primer, epoxy, and other similar products. I have not a clue as to what the CFM requirement is. The only specs that I can find is a "43 PSI max" stamped on the handle of the gun. I suspect the 43 PSI translates into the 10 PSI "at the nozzle" maximum pressure that all HVLP guns are rated at.
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