Usually nitrile is used for utility application but due to its nature it is also used in various hydrocarbon application such as Petroleum, grease, alcohol, glycol, propane, butane and diesel fuels with certain temperature limitation. For hydrocarbon with elevated temperature HNBR can be offered which is usually preferred the automobile industry application.
Viton is a superior grade elastomer also known as Fluorelastomer which is used for Strong and weak mineral acids, aliphatic hydrocarbons, aromatic phenolic and halogenated hydrocarbons, ester of aromatic acids, aliphatic acids, phosphoric acids, phosphoric ester, aromatic ethers, aliphatic ethers, ozone, chlorine and hypochlorite.
Chemical resistance of the seat can be affected by various factors such as fluid concentration, temperature, pressure, flow rate etc. Therefore, the suitability of any seat material/fluid combination cannot be guaranteed. If in doubt, the suitability should be checked by testing under the required operating conditions.