65fastbackresto wrote:...was wondering what this means, "7E7 HE Air Cap (RP compliant, non-HVLP)"
First let's make sure we know what HVLP means. It literally stands for "High Volume, Low Pressure" -- meaning an HVLP gun typically consumes a greater amount of air (CFM) than a high pressure or reduced pressure gun, and since it sprays at low pressure (e.g. 10 PSI at the air cap), the paint has less tendency to bounce off the surface of what you are spraying and into the air. Our friends at the EPA like that, since it meets their air quality specs.
The Tekna with the 7E7 cap manages to be EPA compliant without being an HVLP gun. HE means "high efficiency", which is why it meets EPA air quality requirements - it gets more of the paint onto the car and less into the air. RP means "reduced pressure" instead of "low pressure". Many guys find that easier to dial in for clear, compared with a true HVLP gun. It's also a little less demanding on your air compressor.