Scope of application:
　　It is applicable for all kinds of corrosive chemicals, including strong corrosive liquids (such as liquid strong alkali, hydrochloric acid and sulfuric acid), organic solvent and liquid oxygen, etc. It is used in the sealing of flange, valve, reaction kettle and pump in the industrial fields of petroleum, chemical engineering, chemical fiber, coal mining, electric power generation, metallurgy, etc.
Features:
　　Tinsel and platinum can be added to the ring according to the customers’ requirements.