T-type and D-type bucket elevators apply to vertical conveying of powdery, granular and small blocky bulk materials of low grindability and absorbability, such as grain, coal, cement, crushed ore, etc., with the maximum elevating height of 40m. It has the characteristics of simple structure, stable running, dig-up feeding, centrifugal gravity-type unloading, with the temperature of materials no more than 60℃. TD-type product is designed and manufactured in accordance with the standard of JB3926-85 Vertical Bucket Elevator. Compared with the conventional D-type bucket elevator, this type has high efficiency with more types of material hopper, which should be given priority.