the invention relates to an automatic dyeing without air for metallic surfaces by dyeing protection in automatic systems.automatic gun dyeing without air, according to the invention, is provided with a filter for filtering lamelar pulverized material, a plug, a nozzle and a sealing nozzle sprayinga rubber elastic membrane for actuating the shutter with automatic solidarizata,whose movement can be limited by means of a screw adjustment foreseen with a hole in which the sintered bronze mounts that eliminate the possibility patrunderii of impurities in ca command located behind the elastic membrane.
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