Up to size 315L, backward curved high-performance impellers made of plastic are used, from size 355, backward curved, high-performance impellers made of aluminium are used. The impellers are mounted directly on the rotors of the external rotor motors and are dynamically balanced on two levels with the rotor according to quality level G 2,5 / G 6,3 as per DIN ISO 21940-11.
Size 100 - 250
backward curved high-performance impellers made of plastic
Size 250L - 315M
backward curved high-performance impellers made sheet steel
Size 355
backward curved high-performance impellers made of plastic
