弹性衬垫材料
Resilient Liner Materials

　　EPDM(三元乙丙橡胶) - EPDM是一种三元共聚体弹性合成橡胶，由乙烯-丙烯二烯系单体制成。EPDM具有很好的耐磨损和耐撕裂性能，对于各种酸碱化学品具有很好的耐腐蚀性能。但是，对于油品比较敏感，因此不推荐用于包含石油、强酸或强碱的应用领域。EPDM不能使用在压缩空气管道上。在抗自然老化和臭氧腐蚀方面具有特别优异的性能。
　　EPDM – EPDM is a terpolymer elastomer made from ethylene-propylene diene monomer. EPDM has good abrasion and tear resistance and offers excellent chemical resistance to a variety of acids and alkalines. It is susceptible to attack by oils and is not recommended for applications involving petroleum oils, strong acids, or strong alkalines. EPDM should not be used on compressed air lines. It has exceptionally good weather aging and ozone resistance. It is fairly good in ketones and alcohols.

　　BUNA-N (Nitrile) (NBR)腈基丁钠橡胶 – Buna-N是一种通用的抗油聚合物，称为丁钠橡胶。丁钠橡胶是丁二烯和丙烯腈的共聚物。Buna-N对于溶剂、油品、水和液压液体具有很好的抗腐蚀性。在压缩形变、耐磨和抗拉强度方面也显示出很好的性能。Buna-N不能用于高极性溶剂，如丙酮和丁酮，也不能用于氯代烃类，臭氧或硝基烃类。也不适用于某些航空燃料。
　　BUNA-N (Nitrile) (NBR) – Buna-N is a general purpose oil resistant polymer known as nitrile rubber. Nitrile is a copolymer of butadiene and acrylonitrile. Buna-N has good solvent, oil, water and hydraulic fluid resistance. It displays good compression set, abrasion resistance and tensile strength. Buna-N should not be used in highly polar solvents such as acetone and methyl ethyl ketone, nor should it be used in chlorinated hydrocarbons, ozone or nitro hydrocarbons. Some aviation fuels may not be compatible.

　　Fluoroelastomer (VITON*) (FKM)氟橡胶 – 氟橡胶能够与广泛的化学物质相兼容。由于广泛的化学兼容性，且具有更广泛的温度适用范围，氟橡胶被广泛作为蝶阀O形环和阀座的结构材料。氟橡胶可以用于大多数应用领域，包括无机酸，盐溶液，氯代烃类和石油。特别是用于碳氢化合物应用领域。不建议FKM用于高温水应用领域。
　　Fluoroelastomer (VITON*) (FKM) – Fluoroelastomers are inherently compatible with a broad spectrum of chemicals. Because of this extensive chemical compatibility which spans considerable concentration and temperature ranges, fluoroelastomers have gained wide acceptance as a material of construction for butterfly valve O-rings and seats. Fluoroelastomer can be used in most applications involving mineral acids, salt solutions, chlorinated hydrocarbons and petroleum oils. It is particularly good in hydrocarbon service. FKM is not recommended for use in high temperature water.

*E.I.杜邦公司的商标
*Trademark of E.I. Dupont Co.