Dunan Valves - China Manufacturers, Suppliers, Factory

Dunan Valves, , , ,. The product will supply to all over the world, such as Europe, America, Australia,, ,, .

Installation environment and maintenance precautions of the butterfly valve

Installation environment Installation environment: butterfly valve can be used whether indoor and open air, but in the corrosive medium and easy to rust occasions, to use the corresponding material...
Development History of China's Valve Industry (3)

The continuous development of the valve industry (1967-1978) 01 Industry development is affected From 1967 to 1978, due to the great changes in the social environment, the development of the valve ...
ECWATECH 2016 of Moscow Russia

We attended ECWATECH 2016 of Moscow Russia from April 26~28,our booth no is E9.0.
What should I do if I encounter non-fusion and non-penetration defects after valve welding?

1. Defect characteristics Unfused refers to the phenomenon that the weld metal is not completely melted and bonded with the base metal or between the layers of the weld metal. Failure to penetrate ...
Maintenance Method of Industrial Valve

Industrial valves are an important accessory for controlling the flow of media on industrial pipelines. They are widely used in petroleum, chemical industry, metallurgy, electric power, paper-makin...
Reasons for using electric valves and issues to consider

In pipeline engineering, the correct selection of electric valves is one of the guarantee conditions to meet the use requirements. If the electric valve used is not selected properly, it will not o...