Imported under import Viton O-ring fluorine rubber O-ring with the development of industry, widely used in automotive, electronics, aerospace, shipbuilding, and so requires relatively high precision, high temperature, high wear resistance, the harsh conditions of the work environment With the industrial development, fluorine rubber material is also continuous improvement and innovation, the following is Viton material properties and apply a wide range of uses. Within FKM (Fluoro Carbon Rubber) fluorinated molecules of rubber, according to the fluorine content (ie monomer structure) and there are various types. Six series of fluorinated Viton currently the most widely used first by DuPont to "Viton" tradename listed. High temperature resistance than silicone rubber, have excellent chemical resistance, resistance to most oils and solvents (ketones, esters excluded), weather resistance and ozone resistance; cold resistance is relatively poor, the general temperature range of -20 ~ 250 ℃. Specially formulated to be low temperature -40 ℃. Advantages fluorine rubber O-ring: Can be heat to 250 ℃ · For most of the oil and solvents have the ability to resist, especially all of the acids, aliphatic hydrocarbons, aromatic hydrocarbons and animal and vegetable oils Viton O Disadvantages-ring: ? not recommended for use in ketones, low molecular weight esters and mixtures containing nitrate. · Automobiles, motorcycles, diesel engines and fuel systems. Scope: · chemical seals. Perfluoroelastomers FFPM (Perfluoroelastomer) Advantages: - Best heat resistance · excellent chemical properties · Features · Excellent Low Outgassing characteristics of anti Plasma Cons: poor low temperature properties · · · higher raw material prices, higher production difficulty applicable Scope: · perfluorinated products widely used in the semiconductor industry and related industries in the use of information, the use of range includes film manufacturing process of PVC, CVD and etching processes and a variety of high vacuum sealing process. Silicon fluorine Viton (FKM, FPM) formula (a) molecular structure CF3 - (CH2-CF2) (CF2-CF) A-Type CF3 - (CH2-CF2) (CF2-CF) (CF2-CF2) B- Type / F -Type CF3 - (CH2-CF2) (CF2-CF) (CF2-CF2) CSM G-Type OCF3 - (CF2-CF) (CH2-CH2) (CF2-CF2) ETP - (CF2-CF2) Note Viton main features (CH2-CH) TFE / P || C H3 for the import of fluorine rubber O-rings are temperature and chemical resistant, and have a good anti-aging and anti-ozone performance, and infiltration of tolerance is also very low. Even in very poor working conditions, there is still a very good wear resistance. Fluorine rubber can withstand +200 degrees or below the operating temperature, can be allowed to run short in case of oil-free. Fluorine rubber is resistant to oil, hydraulic oil, fuel, lubricants, inorganic acid, aliphatic hydrocarbons and aromatic hydrocarbons, etc., but in the case there are esters, ethers, ketones, amines and certain high-temperature water, such as hydrogen fluoride compound, You should not use Viton. In normal working conditions and temperature below +200 degrees, fluorine rubber is very stable and harmless. But the face of more than 300-degree heat, such as gas cutting gun fire, fluorine rubber will release harmful gases. Inhalation or into the eyes of these gases will cause harm to human health. Viton seals Once heated to temperatures above 300 degrees, even after the cooling treatment will be dangerous, and therefore must not be any direct contact with the skin