An industrial spray gun consists of basic parts of aircap, flow regulator, nozzle, and tank (some types of industrial spray gun have a tank).
Aircap: this part works for mixing the air and paint, directly affecting the quality of the result and amount of the paint used.
Flow regulator: this part is used for adjusting the amount of paint coming out through the nozzle.
Nozzle: this part is where the paint comes out. Different sizes of nozzles are available to choose according to needs, and some industrial spray guns have interchangeable nozzles.