Materials: PP, PVC, FRP Construction: Turbo type, Sirocco type Features and Applications: higher performance than belt-driven fans, excellent durability. Both types of fans are applicable to a wide range of applications. The optimum efficiency and performance can be achieved through appropriately configuring inlet and outlet equipment, and through manufacturing blades and hub with materials suitable to operating conditions, and axes with white iron or black iron steel. ● Y-shape straight tees ● Various-shape reducing tees