Rocvent Inc.
Mine and Tunnel Ventilation
The material is welded in purpose-built, high frequency machines to form flexible tubes.
This ducting is manufactured with spring steel wire welded to the ducting using a special extruded PVC profile with wear protection. The spiral ducting is used with negative and positive pressures.
The Duo-Duct is manufactured in an "oval" shape reducing head room requirement by 25% permitting larger equipment to be used.
The PVC spiral reinforced duo-duct is used with positive and negative pressure and low head room.