Spray gun and nozzle assembly attachment

A liquid spray gun nozzle assembly comprising:

• a coating liquid inlet portion comprising a liquid connector for connection to an external liquid source;
• a coating liquid outlet portion comprising a liquid nozzle for spraying a coating liquid fed into the nozzle assembly through the coating liquid inlet portion, the liquid nozzle being disposed along a spray axis;
• a coating liquid flow path fluidly connecting the coating liquid inlet portion to the liquid nozzle;
• a spray gun connection portion opposite the coating liquid outlet portion adapted to connect the liquid spray gun nozzle assembly to a compatible liquid spray gun body, the spray gun connection portion comprising a nozzle assembly sealing surface adapted to seal the liquid spray gun nozzle assembly to the compatible liquid spray gun body,
• wherein the nozzle assembly sealing surface comprises:
• a first sealing member that is circular shaped and coaxial with the spray axis;
• a second sealing member that is circular in shape with allowances for irregularities;
• wherein the first sealing member and the second sealing member are essentially concentric with one another,
• wherein upon connection of the liquid spray gun nozzle assembly to the compatible liquid spray gun body, a center air zone is concentric with, and isolated between, the first and second sealing members.