... purpose, diameter from 80-1500mm. The spiral duct forming machine ZHTF-1500I is used to produce the round rigid ... x 2800mm x 2580mm (can be loaded in one 20’ container, disassembled, 8. in case 3000x2000x2200)9. Weight: 2500kg10. ... station: 8kgf/cm2Key words: spiral tubeformer, spiral duct forming machine, ventilationd duct machine, spiral tube former, spiral duct former, ventilationd duct ...