Douai is designed and manufactured using high-quality material and the latest techniques in compliance with industry standards. There is no tightness degradation caused by temperature variations, pressure cycling, and vibrations
c******q
The design of Douai is never out of date. It has been exported to USA, Italy, Germany, France, Poland, South Korea, etc
h******d
The design and material selection processes of Douai are strictly controlled. Water, sludge, and other impurities are removed in the production
l******q
Douai leads in design and technology. It serves 500 more refrigeration brands such as ARKOOL
c******r
The manufacturing process of Douai is safe and reliable. It is not poisonous or lethal to human health and foodstuff
e******p
A rigorous quality control process ensures zero defects and consistent quality. Its heat exchangers, pipes and components are selected to reduce the amount of refrigerant in the system without reducing energy efficiency