Spiral Duct & Fitting Machines

The BTF-I uses a spring-steel forming die and synchronized saw cutting. The BTF-II uses a fixed forming mold with roll-shear cutting, while the BTF-III has cast-aluminum forming molds and a slitting cutter. Compare tooling for your diameter mix and the material-specific working range. A fixed mold does not mean that every diameter uses the same tool.

The BOT-I reshapes prepared round duct into a flat-oval section. Start with the required finished width, height and length, then match the incoming round duct and forming tools. Include the round-duct production stage separately when planning a workshop from raw coil.

For segmented elbows, the work starts with cut and rolled sections, followed by flanging and lock-seam assembly. A corrugated elbow former shapes an existing tube using dedicated tooling. The elbow welding equipment joins prepared elbow pieces. These routes produce different constructions, so choose from the specified elbow design and joint detail.

No. Feed speed measures the strip entering the machine. Finished duct length also depends on diameter and spiral geometry, while cut-off cycles, coil changes and handling affect output per shift. Compare proposals using finished lengths or pieces for the same duct specification and production schedule.

Angle-section flange equipment forms circular rings; beading and flanging machines prepare shaped duct ends. The fitting shaper handles rolled edges and gasket fitting, while the canvas connector line produces metal-edged flexible connection strip. Select these by the joint drawing. An angle-ring punching unit is an additional option, and a gasket fitting machine alone does not establish a leakage classification.