Inner duct of the item is perforated duct, which is covered with tough polyester film and flbreglass wool. The outer jacket is spiral flexible aluminum-plastic composite duct. It is characteristic of well preventing sound leaking from pipe wall, higher strength good resistance to acid, alkali, wear-resistance, puncture and tear resistance.
perforated AL foil
Glass wool blanket:
non woven fabric/PET film
steel spiral helix between the lays
Q1:Do you have your factory? A1:Yes, we have a factory in SuZhou city, Jiangsu Province, China. We have 15 production lines and over 50 technicians.
Q2:How about the quality? A2:Our factory has ISO9001 certificate and Some of our products have passed UL181 and BS476 examinations in the past few years,and we are getting more international certificates this year.
Q3:How about your delivery time? A3: Generally, it will take 15-20 days after receiving your deposit. the specific delivery time depends on the items and the quantity of your order.
Q4.If I have custom-made requirements, do you have a person to design according to my concept? A4: Yes, our R&D department will assign a designer to each customized orders to make sure everything goes the way customers want.
Q5. Can you produce according to the sample? A5: Yes, we can produce if you have samples and we can develop accordingly.
Q6. Do you test all your goods before delivery? A6: Yes, We have our QC team and our products will strictly inspect before delivery Yes，the QC team checks the products at least 3 times after each procedure of the Assembly line.
Q7.Is the sample fee refundable or not? A7: refundable once order confirmed.
Q8：Introduce your company briefly A8：In the 1990s, we made acquisition of DEC Beijing（DUTCH ENVIRONMENT CORPORATION Netherlands）and all of its machines、equipment and techniques. After over 20 years of development, we have progressed lots of new products and techniques on basis of DEC, and these new products are widely used in many fields in China such as military、aerospace、nuclear power、air conditioning、construction，etc.