“…In this case blade may be matched with secondary element of the asynchronous linear induction motor (LIM) thus ensuring a high speed of the shutter and herewith operation of the damper [8][9][10]. To prevent malfunction of such fire dampers due to seizing of the blade plate affected by blast wave additional bearings can be used, installed in LIM inductors active zone [11] but it helps only when the blade itself is not deformed too much, and this condition may be met when damper is completely shut before pressure jump.…”