Head cover and clamping disc are made of thick walled molded ETFE with metal core for unsurpassed long-term performance Table for chemistry compatibility PTFE ETFE/ ECTFE Acid amides Acids, dilute or weak Acids, strong or concentrated Alcohols, aliphatic Hydrocarbons, aliphatic Hydrocarbons, aromatic Hydrocarbons, halogenated Oxidizing acids, oxidizing agents Dimethylformamide (DMF), Acetamide, Formamide Acetic acid, Carbonic acid, Butyric acid PTFE Well-proven PTFE sandwich diaphragms for increased reliability and extended service life Hydrochloric acid, Sulfuric acid, Nitric acid, Trifluoroacetic acid (TFA) Methanol, Ethanol, Butanol Formaldehyde, Ethanal, Hexanal N-Methyl-2-pyrrolidone (NMP), Triethylamine Sodium hydroxide, Potassium hydroxide, Ammonia FFKM Inlet and outlet flapper valves are made of FFKM or PTFE for both highest leakage tightness and best chemical resistance Ethyl acetate, Butyl formate, Amyl butyrate Diethyl ether, Tetrahydrofurane, Dioxane Pentane, Hexane, Heptane Benzene, Toluene, Xylene Methyl chloride, Chloroform, Ethylene chloride Acetone, Cyclohexanone Ozone, Hydrogen peroxide, Chlorine Valve connectors are made of ECTFE for an optimum of thermal, mechanical and chemical resistance Internal tubing and fittings made of PTFE/ETFE/ECTFE compounds Dimethyl sulfoxide (DMSO) P TFE: Polytetrafluoroethylene ETFE: Ethylene tetrafluoroethylene ECTFE: Ethylene chlorotrifluoroethylene FFKM: Perfluoro elastomer VACUUBRAND GMBH + CO KG Alfred-Zippe-Straße 4 97877 Wertheim Germany ++ excellent chemical resistance + good to limited chemical resistance – poor chemical resistance * for some solvents ‘+’ ©VACUUBRAND GMBH + CO KG . 05/2017 . EN/995512 . The data are based on information from various literature. VACUUBRAND does not warrant the accuracy of these data. Due to the variety of possible influencing factors, they can serve only as a guide. No legal claims may be derived from user reliance on these data. CHEMISTRY COMPATIBILITY of VACUUBRAND Chemistry Diaphragm Pumps

uncompromising chemistry design for diaphragm pumps One of the most distinguishing properties of PTFE is its outstanding chemical resistance, except for some extreme conditions such as molten alkali metals or elemental fluorine. Basically PTFE is not soluble in any organic solvents. Even aggressive acids such as aqua regia cannot attack PTFE. The reason for this is a particularly strong bond between the carbon and the fluorine atoms and the shielding of carbon atoms by the surrounding fluorine atoms. Fluoropolymers and perfluoro elastomers are materials containing fluorine atoms in their chemical...