Whisper-lock seam closer. Whisper-Lock Seam Closer is available in the horizontal or vertical and close pittsburgh seams.Pittsburgh joint ismonly used by manually hammering the margin of the seam against the duct wall (peening).It is suitable for plates of different some extend,it can produce any size duct.HVAC machinery sales of sheet metal duct forming machines such as Pittsburgh lockformer, S-clip, Button Snap Lock, Turret Punch, Duct Beader ... * Flanging/Standing Seam Rolls $4800. * Motor is 5 HP, 220 volts, 3 phase. 440 or 380 volts available. ... This 16 gauge Pittsburgh Lock machine has 7 different forming stations with 2 forming ...Pittsburgh Lock Seamer can cut your finishing time up to 90%. It can be used to fold over or "seam" metal 24 to 20 gauge (FS2420) and or 20 to 18 gauge (FS2018) on general fabricating, run Pittsburgh Lock Seams on ductwork, tubes, doors, panels, etc. Operators require no special training or skill. The finished seam is straighter and smoother ...The Lockers are designed for closing straight or curved Pittsburgh Lock seams on ducting, creating a continuous air tight seal. They have the ability to close Pittsburgh Lock up to a maximum thickness of 1.25mm mild steel on the SC12 models and a maximum of 1.0mm on the SC10 models, automatically adjusting in accordance to the sheet thickness.