... from 100-1600mm. The spiral duct forming machine ZHTF-1500II is used to produce the round ... unloading rack, low labor costMain configuration1 Uncoiler: mechanical expanding type, capacity 1500kg, inner diameter range 480- ... machine, ventilationd duct machine, spiral tube former, spiral duct former, ventilationd duct machine, HVAC duct machine, air duct machine. High config spiral tube former machine ...