Ugello ad aria MB 821 (BNR 10 / BNR 100) con anello adattatore

Air nozzle MB 821 (BNR 10 / BNR 100) with adapter ring — an element of a gas burner device that forms the air flow for mixture formation. The nozzle is designed for BNR 10 and BNR 100 series burners and is supplied with an adapter ring for ease of installation. This part affects the aerodynamics of combustion, so its replacement is required when worn or when boiler operating modes change. Used in heating systems where precise burner adjustment is important.