VENTILATION SYSTEM VALVE AND DRIVE TURNING THE VALVE FLAP AXLE

摘要

FIELD: ventilation. SUBSTANCE: valve has body accommodating flap mounted on axle for turning and provided with gasket made of thermally expanding material and positioned over perimeter. Valve also includes flap axle turning drive and flexible sealing element made in the form of tape of thermally-expanding material. Flap axle turning drive contains return spring coupled to axle and spring stopping mechanism. Spring embraces flap axle. Stopping mechanism is coupled to spring through lever secured to it. Drive is provided with lock and auxiliary lever, one end of which is secured to spring with lever and the other is coupled to lock made of thermosensitive material and designed for deformation or destruction in case temperature value exceeds preset one. Valve enables sealing of clearance between body and flap with melting and caking of gasket and flexible sealing element. EFFECT: higher efficiency. 9 cl, 4 dwg