Powder coating guns "puffing" or "surging"
Jun 11, 2011·2000. In our own terminology we call it "Gun Spitting". True, getting the right fluidity of the powder is the basic solution. But my observation is that every time we start a new color run (after a color change), we found it is important to readjust the conveying air, dosing-air etc. and to check the flow or discharge of powder from the gun nozzle.