Left-handed and right-handed spirals are alternately arranged and jointed with straight rods. If rod pitch is less than two-fold spiral pitch, belt is called A2. If rod pitch is equal to or larger than two-fold spiral pitch, belt is called F2.
Applications:
High-temperature automatic production lines; heat treatment of parts in the machinery industry; automatic production lines for cathode ray tubes in the electronics industry; annealing furnaces for glassware; special high-temperature resistant equipment; heat treatment, cleaning and conveying; processing of leather and asbestos products; drying applications in the food industry, etc.