Jinan United Perfect Building Materials Corporation
is professional manufacturer of Flexible ducts and we have engaged in research, develop and produce flexible duct products for 10 years with rich experience.
We provide customers with green and eco-friendly bare flexible duct, insulated flexible duct, PVC flexible duct, semi rigid duct products etc. to create a better working and living environment for people.
1, Aluminum Bare Flexible Duct
    
Aluminum bare flexible duct (Aluminum non-insulated flexible duct) is specifically produced for low and medium pressure heating, cooling, ventilation, exhaust and air conditioning systems. Aluminum non-insulated flexible duct (ABD series) is produced from multi layer aluminum strengthened with high tension hard steel spring wire. It has high elasticity and flexibility.2, Aluminum Insulated Flexible Duct     

Aluminum Insulated Flexible Duct is made of aluminum/polyester lining with well balanced steel spiral internal duct+(16-32)kg/m3-25mm glass wool+ aluminum/polyester external duct.
It is suitable for the densely-populated area with high requirement of the environment area, such as school, hospital, laboratory, supermarket, office, stadium, theater etc.
2.1 Normal Insulated Flexible Ducts  (Noise reduction flexible duct is also available according to requirement.)
2.2 Special Insulated Flexible Ducts  

Square and rectangle insulated flexible duct is needed in some project, so does white fiber glass wool insulated flexible ducts. Below is the technical data:3, Semi Rigid Duct    

Semi Rigid Duct (Semi-flexible aluminum air duct) is flexible, extendable and highly reliable for low and medium pressure air conditioning, ventilation, boiler systems and chimney liners. It is very light with negligible extra load, easy to install and it is non-flammable.4, PVC duct and PVC Combined Duct