Field of application: medium and low capacities, high pressures. Type of blades: backward. Applications: suitable for pneumatic conveyance of plastic chips, solid material mixed to air, if blower is not crossed. Air temperatue: up to 60° C standard, special features for higher temperatures. Construction specifications: rigid construction in sheet metal. Statically and dynamically balanced impellers. Working principles: condition of the ducted air T = 15° C, p = 1 atm