Duct lock forming machines can process galvanized sheet with different thickness into various shapes,such as profile pittsburgh,single hem,double hem,snap hem,elbow,S shape and so on.

Whisper-Lock Seam Closer is available in the horizontal or vertical and close pittsburgh seams.Pittsburgh joint is commonly used  by manually hammering the margin of the seam against the duct wall(peening).It is suitable for plates of different thickness.To some extend,it can produce any size duct.

Convenient, fast, portable sewing machine is an ideal tool for efficient, rapid completion of pittsburgh commissure.

The bending pipe welding machine is suitable for the welding application of the inner and outer arc of the stamping attachment of the land circular air pipe. The welding control unit and other aspects of the man-machine interface of the equipment are independently developed and designed, including the important welding elements such as welding current and speed,and the digital display of the  man-machine interface is fully realized.And for the welding characteristics of galvanized sheet steel, in the welding control of the design of a unique welding curve, so that it can be more reliable to complete the professional needs of galvanized sheet welding.