The Butterfly Valve Manufacturer Tells You What Is The Difference Between Fluorine-lined Butterfly Valve And Hard-sealed Butterfly Valve?

Lined Butterfly Valve: The lining material of the fluorine-lined butterfly valve is fluoroplastic. Most of the materials on the market are made of polytetrafluoroethylene, and the code name is polytetrafluoroethylene. PTFE material has strong corrosion resistance and can be used for highly corrosive media such as strong acids and strong alkalis. At the same time, the material also has certain heat resistance and cold resistance, and is suitable for temperatures between -196200℃. Advantages: 1. The fluorine-lined butterfly valve relies on the excellent performance of polytetrafluoroethylene to effectively isolate the medium and the valve body to achieve the purpose of corrosion prevention. It has been widely used in petroleum, chemical industry, environmental protection and other fields.

Hard seal butterfly valve: A butterfly valve with metal materials or other hard materials on both sides of the sealing ring is called "hard seal". This kind of seal has poor sealing performance, but has high temperature resistance, wear resistance and good mechanical properties. For example: steel + steel, steel + copper, steel + graphite, steel + alloy steel (the steel here can also be cast iron, cast steel, alloy steel or surfacing, spray alloy). Advantages: 1. It has high temperature resistance, wear resistance and good mechanical properties, and long service life. 2. The hard-sealed butterfly valve adopts a precise J-shaped elastic sealing ring and a three-eccentric multi-layer metal hard sealing structure. It is widely used in metallurgy, electric power, petrochemical, water supply and drainage, municipal construction and other industrial pipelines at medium temperatures below 425°C.