Hydrogenated nitrile rubber（HNBR） is a special kind of hydrogenation hydrogenated nitrile rubber. It is a highly saturated elastomer. It is good at oil resistance (including fuel oil, lubricating oil, aromatic solvent); it is also good at heat resistance, excellent chemical corrosion resistance (including freon, acid, alkali), excellent ozone resistance and higher compression permanent deformation resistance. It also has more advantages like high strength, high tear performance, wear-resisting performance, etc. The service time of Hydrogenated nitrile rubber is about 600 h. - See more at: http://www.yindapump.com/show-70.html#sthash.5LuFeRma.dpuf