The TruTool F 300 closes Pittsburgh seams in straight or bent ducts in an independent roll-glide process. The sheet thickness range extends from 0.03 to 0.05 inch mild steel. The seam locker works conveniently and quietly; the infeed ensures continuous and tight seams. There is no need for conversion for processing of shaped and curved pieces. Adaptation to sheet thickness is automatic. On-site assembly is also possible.
The important qualification for these tools is the height of the seam to be closed: the F 301, recommended for applications from 19 to 26 gauge, requires a minimum seam height of 1/4″. The F 300 is recommended for 18 gauge duct, and requires a minimum seam height of 5/16″.