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US Duct's Zipper Duct Solutions

US Duct manufactures a full array of Zipper-Duct options. Feel free to Contact US for a quote or more information.


General Description of Zipper Duct: 

Zipper duct is a great solution when dust/fume must be extracted from a process involving a moving ‘unit’. This unit can be a: saw, welder, grinder, filling spout or anything that moves over a linear course as the dust/fume/mist is produced. The carriage of the zipper duct will move with the unit. 

  • The individual zipper duct only moves in one linear direction. Flex hose will allow the unit to move up and down and give other radial movement. Two lines of zipper duct in an x-y configuration can be used for greater motion.
  • The moving collection head of the zipper duct is on a smooth rolling trolley system called a sled.  While most connections are made with flex hose, flex hose cannot be relied upon to provide enough strength to move the sled and therefore it needs to be otherwise attached to, or controlled in some fashion by the moving unit.


Zipper duct can be constructed in virtually any length. The size of the fan is the primary limiting factor. The required length is made by bolting individual sections together and capping off the final end, and attaching extraction duct to the other. These sections are essentially rectangular troughs with an open top across which is laid a heavy duty conveyor belt to seal the opening. A series of rollers inside the sled, lift the belt to expose the opening as it is pulled along. This allows the air to pull through the sled and consequentially through the flex hose and the dust/fume producing unit, completing the extraction process. Dust that is collected is pulled through the trough- pointing out the need for correct sizing of the fan to the zipper duct. 

Zipper Duct


Zipper Duct Operation (see video below)

The duct line connects to Zipper Duct via a round duct connection that is attached to the trough at either end or somewhere between the ends and thus connected to the collection system line. The vacuum from the zipper duct is transferred to the moving sled, which in turn is connected to the moving machine. A round or rectangular connection is provided at the sled for a connection of pipe to the traveling source that is generating the dust, smoke or fume.

Possible Applications include:

  • Gantry welder
  • Plasma cutting tables
  • CNC routing tables
  • Head Houses at grain mills for the tripper belt
  • Lathe operations that generate chips and dust


Zipper ducts are often used when the travel distance of the machine or the abrasiveness of the conveyed material exceeds the recommended use of flexible or jointed pipe.  CFM can range widely from as low as 400 to 16,000.

Zipper duct systems are usually custom designed and sized for each application. Zipper duct is a great solution for many applications and US Duct is happy to provide you with a quote for your particular need. 




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