Technical features and advantages

-Variable Diameter

To accommodate changes in tunnel section and to adjust duct dimensions.It can be used to balance the change of air pressure to achieve the balance of material stress and prolong the service life of air duct.

-Elbow

Any angle elbows of 30, 45 and 90 degrees is provided to meet the service conditions under complex conditions.

-Tee

The angle between the straight pipe and the branch pipe can be customized at any angle of 30, 45, 60 and 90 degrees.Tees can also be made in Y and T shapes.