In order to isolate vibrations caused by air handing units, fans or other  equipment connected to air ducts, it is highly recommended to install a flexible  connector joint between the outlet of these and the airduct. It is  necessary to select an airtight and flexible cloth, with good weathering  qualities and one which will withstand the temperatures inside and outside the  duct. Duct being generally made of steel, the main difficulty is to fasten the  cloth to it in order to obtain a perfectly airtight joint.

Easyflex circular straight sleeve connectors are perfect for this job.  

The circular straight sleeves can be produced for any diameter, They  are made from Polyurethane cloth strips (M0 and 400 degree C/2h  classified) 160 mm wide and the  are sewn with a strong, high temprature thread. Each sleeve is supplied with two suitable clamps.  Assembly takes place by sliding the sleeve over the external diameter  of the circular duct and its matching part and clamping each end. This  is simple and efficient and affords perfect airtightness 

Fabric

• Glassfiber coated with polyurethane on both sides
• Fire resistance : M0 and 400 degree C/2h
• Sewn with high temperature thread
• Other fabrics available on request