Air ducts are generally used indoors and outdoors to connect air outlets, in order to circulate air and reduce the concentration of harmful gases in a municipal infrastructure. The common air duct is a rectangular air duct with a large flow area.

The production of rectangular air ducts is divided into two processes: forming and seaming. Forming can be done by a fully automatic air duct production line or the operation of a small machine to process a flat sheet into a rectangular air duct. The seam process is the most important and will affect the sealing performance of the pipeline. A suitable seam closing machine will also greatly affect the efficiency of the work and save a lot of costs.

Preda's horizontal pneumatic seam closing machine is a machine that processes air ducts through pneumatic control. It can process air ducts with a length of 1300mm without manual tapping and closing of air ducts. It can be placed on the workbench and started by foot control to complete the work.

Preda hydraulic vertical seam closing machine is a machine controlled by numerical control programming, which can process air ducts with a length of 1550mm. Through NC control, the input program can complete multiple pipes continuously without repeated operations, which saves a lot of operation time.

Preda's new hand portable electric seam closing machine is one of the most popular equipment at present. It is light and portable, and can be used when connected to electricity. The whole machine only needs 0.75kw power, which is more energy-saving. At the same time, it is suitable for air ducts of different lengths. The minimum rectangular air duct of 150*150mm can be processed. The seam is tight, and the seam of the air duct can be completed at one time. Low noise, can be used indoors and outdoors, and long service life.

Preda's hand portable electric seam closing machine is suitable for sheet thickness of 0.5-1.0mm, and sheet thickness of 0.75-1.2mm. 220V 1PH voltage. After the launch of the market, it is well received by the market, and the price is affordable. It is an economical and practical air duct equipment.