Gas burners two stages with: die-cast aluminum body, fan at high pressurization and combustion head with adjustment at high efficiency and high flame stability. Compact overall dimensions and disposition rationalized of the components with accessibility facilitated for the operations of setting and maintenance. Available in the versions METHANE (natural gas) or L.P.G. (to specify at the order) on demand specific versions for town gas, coal gas or biogas. Gas train completely assembled, electrically linked and tested; complete of two stages working valve with flow adjustment, safety valve, minimum gas pressure switch and stabilizer filter of gas pressure. Complete of flange and gasket for installation on generator.