1.    The tunnel flexible duct is made of excellent double layer PVC(Polyvinyl Chloride) fabric,middle is Gridding fabric,combined with helix steel wire and covered by the (PVC) adhesive tape.

2.    The duct is very leggierem can bend and connect freely.

3.     The duct can conveniently schlep ,endure high temperature, acid,alkali,oleic acid and fire-resistant.

4.     the duct body is without any lapping defect,with the strong points of high dense,durable abrasion and corrode.anti-static,low wind resistance,strong anti-pressure.

5.     Specification:diameter:100mm-1500mm   length:1m-30m without any jointing.

6.     it can conveniently connected to the portable ventilator.

7.     The duct’s rings:install 1pc of ring each 1.8m distance,can easily fix the duct at the stationary place.

8.     The duct’s opening side is with buggle style and pp rope,the end type is with steel wire,can connect and extend freely.

9.     Application: it has been extensively used in shipping building,engine room,basement,mataining the underground cable,tunnel,the municipal conduct engineering,fire fight rescue,mining ect such bad enviroment.it is the necessary device of portable ventilator.