4 mm stainless steel, type AISI 316L, welded construction. 3mm casing on circular dampers up to ø400mm.
To prevent leakage between blades and casing.
Made of 0,3 mm cold rolled stainless steel strips in AISI 301.
4 mm stainless steel, type AISI 316L, formed with a longitudinal v-section to provide extra strength and designed with 35 mm blade overlap .The blades are bolted and welded to the shafts.
Ø-20 mm stainless steel ,type AISI 316L bolted and welded to the blades