... the oxidizing ditches in the technological pro Modle QDT low-speed flow propeller is extensively used for the flow propelling ... water cycling and so on. The low-speed flow propeller consists of the submersible motor, speed-reducing device, vanes, installation system, ... by low power (1.5-7.5KW), low rotational speed (36~135rpm), large diameter of the vanes (1000-2500mm), low-speed rotation, ...