Jalousie Shutter ABC-JSOF with Cover Flange, ABC Vent

Is generally used at the end of circular channels to prevent flame blow-back as fan engine is turned off. The shutters are self-closing through their own weight.
ABC-JSO is manufactured with an aluminium finish frame in which the aluminium shutters are mounted.
ABC-JSOF is also equipped with a cover flanges for a beautiful end result. Made to corrosion class C4 and have, in addition, a replaceable insert.