This chart is intended

BTV2000 Elastomer Seat Energizers and Stem Compression Seals This chart is intended only as a guide for the selection of elastomers for Durco BTV2000 Fluoropolymer or U.H.M.W.P.E. lined butterfly valves. The recommendations may be used for selecting the most appropriate elastomer for the intended service but should not be considered a guarantee or blanket recommendation or for selecting the appropriate liner material. This chart is a compilation of published data and best judgment. The elastomers in the BTV2000 are normally not wetted parts and therefore do not come into contact with service media. However, should the non-metallic liner become damaged or breached due to improper installation or service conditions, compatibility with the media should be considered. The limitations of elastomers may dictate the use of an all-metal alloy Big Max BX2001 butterfly valve. Many factors must be considered when selecting an elastomeric material for a corrosive service. These include: concentration of all chemicals present; maximum, minimum and normal operating temperature; velocity; type and size of any solids present; continuous or intermittent operation; and any other peculiarities characteristic of the solution. Key To Ratings A = Excellent, little or no swelling or softening or surface deterioration. B = Good chemical resistance. Minor chemical attack, swelling, softening or surface deterioration. C = Limited chemical resistance. Moderate chemical attack. Conditional service. NR = Severe attack, swelling, softening, or dissolved within minutes to months. Not recommended. A to A to 100% to A to 20% to 15% volume increase or 15% loss of tensile strength at 100% concentration or concentrated saturated solution, to. Little or no chemical attack. 15% volume increase or 15% loss of tensile strength in any concentration from 0 to 100% at. Little or no chemical attack. 15% volume increase or 15% loss of tensile strength in any concentration from 0 to 20% at. Little or no chemical attack. B 20-50% 15% to 30% volume increase or 15% loss of tensile strength, 70 to from 20-50% concentration of solution between 70 to. B to conc to A/C at 15% to 30% volume increase or 15% to 30% loss of tensile strength, in any concentration to 100% at any temperature from 70 to. 0% to 30% volume increase, or 0% to 30% loss of tensile strength at 100% concentration or concentrated, or saturated solution, at. Reported data varies widely possibly due to compounding differences within the same generic family. NR or NR >50% volume increase or > 60% loss of tensile strength at 100% at concentration, or concentrated, or saturated solution at. Severe attack. Not recommended. Bulletin VT-3c

Acetic acid B to, NR Hot B < 50% <100 F, NR Hot Acetic anhydride B/C to B <50% to, NR Hot Adipic acid No data A to, B to Alcohols general Test first Test first Amines B/C to NR Ammonia gas A NR hot/cold Ammonia B/C to, C NR anhydrous liqd. to 240 F Ammonia A/B <30% to, A/B <30% to aqueous liquid C Ammonium B/C to A to all chloride concentr. Ammonium nitrate B/C to A to all concentr. Aniline A/B to A to, C to 158 F Aniline NR > NR > 158 F Aniline dyes Test first B to Arsenic acid A to, NR > A to, B to Barium carbonate NR A to Barium chloride A to A to Barium cyanide NR NR Barium fluoride NR C to Barium hydroxide A to A to Beer A to A to Beer wort A/B to A to Benzoic acid Test first A to, B to Black liquor A to A to Black liquor waste NR A to Bleach liquor B to A to Boric acid A to A to, B to Brine A to A to Brine CaCl A to A to Brine CuCl A to A to Brine NaCl A to A to Brine sea water A to A to Brine acid NR A to Bromine C to A to, A/B anhydrous liquid to Bromine gas NR A wet or dry Cadmium cyanide NR A to, A/B Calcium bisulfate A/C to A to Calcium bisulfide C to A to, B to Calcium chloride A 50-100% to A to, A/B 176 - Calcium NR A to hypochloride Calcium B 35-100% to A to, A/B hypochlorite Carbolic acid NR A to, A/B Carbon Disulfide NR A to, A/B to 185 F Carbon NR A to 158 F, B tetrachloride to 250 F Carbonic acid A to A to, A/B 185 - Caustic soda A - 10% to 75 F A (solution) to Caustic soda B - 10-50% to NR 15-30% to 150 F Chlorinated NR A to salt brine Chlorinated NR A solvents Chlorine dry NR A to, A/B to 400 F Chlorine wet NR A to, B/C to 300 F Chlorine water NR C 400ppm to Chlorine water NR NR 400ppm to

Chloracetic acid NR B 50-100% to Chloracetic acid NR C 100% to Chlorobenzine, NR A mono Chlorobenzine, NR A Di, Tri Chloroethane C to A to Chlorosulfonic acid NR NR wet, C to dry Chlorothene NR A/C to Chromic acid A 10% @ A (conc) to Chromic acid C 5%-50% to A (conc) to Citric acid A to A (conc) to boiling Copper arsenate, NR A to basic Copper cyanide A to A to boiling Copper nitrate NR A to Copper sulfate A to 100% to A to conc to Cupric chloride A to A to conc to Cupric nitrate NR A to Deionized water No data A to, A/B DMP Dimethal NR A to, B to phthalate 250 F DMT NR A to, B to Dimethal trpthalate 230 F Ethyl dichloride C/NR to A/B to Ethylene glycol A to A to 250 F Fatty acids C to A to 145 F Ferric chloride A/B to conc to A to, B to Formaldehyde B to A (conc) to Formaldehyde B to A to 37% to Formic acid B/C to NR Glycerin A to A to 250 F Glycols general A to A to Green liquor A to A to Green sulfate A to A to, B liquor to Hydrobromic acid NR 20-100% to A to 100% to Hydrobromic acid NR 20-100% to B 20% to Hydrobromic NR A to 120 F acid gas Hydrochloric acid NR 100% to A/B 50-100% to Hydrochloric acid B/C 50% to A to 37% to 130 F Hydrochloric acid B/NR 38% to A to 25% to Hydrochloric acid A/B to 20% to NR 38% to Hydrocyanic acid A/C to A to 100% to Hydrofluoric acid B/NR 20%-50% to A/B (conc) to 120 F Hydrofluoric acid NR 65%-100% to A to 60% to 130 F Hydrofluoric acid NR 65%-100% to A to 50% to Hydrofluoric acid NR 65%-100% to B 50% to Hydrofluoric acid NR 65%-100% to C 50% to Hydrofluoric acid NR 65%-100% to A to 30% to Hydrogen NR A to wet chloride gas or dry Hydrogen cyanide A/C to A to 100% to Hydrogen fluoride NR A to 120 F Hydrogen peroxide B 90% at A to 100% to Hydrogen peroxide B/C 100% to A/B 100% to 160 F

Hydrogen peroxide B 90% to 160 F NR 100% to 240 F Hydrogen peroxide A/B to 50% to 125 F A 50% to 200 F Hydrogen peroxide A to 30% to C 10-30% to Hydrogen peroxide A to 30% to A 5% to Hypo A to A to Hypochlorous acid NR A to 100% to Hypochlorous acid NR B 10% to Iodine C to A (conc) to Isocyanates No data A/B to Lactic acid A to A to 100% to Lactic acid B to A to 80% to Lactic acid A to B 80% to Lactic acid B to A to 25% to Lead acetate NR A to, B to Lead nitrate B to A to Maleic acid No data A to Malic acid B at A to, B to Manganese A/C to A to chloride Mercuric chloride A (conc) to A to Mine water A/B to A to 180 F Muriatic acid NR 100% to A/B 50-100% to Muriatic acid B/C 50% to A to 37% to 130 F Nickel chloride A to A to Nickel sulfate A to A to Nitric acid all Test first Test first Nitrobenzene C/NR to A to Oleic acid NR A to, B to Oleum NR B to Prechloric acid NR A to 100% to Phenol NR 10% to A to 100% to 100% to Phosphoric acid B/C 20% to A to 100% to Phosphoric acid C 10% to 158 F B 100% to 185 F Phosphoric acid NR 50-100% to A to 85% to Phosphoric acid NR 100% to 158 F B 85% to Phosphoric acid C to A to crude Phthalic acid A/B to A to Picric acid NR A (conc) to Picric acid NR A 10% to Picric acid NR C 10% to Picric acid NR NR 10% to Poly glycols A to A to Potash caustic C 50-100% to A/B to, NR to Potash caustic A/B 1% to A/B to, NR to Potassium bisulfate No data A to Potassium chloride A to A to Potassium A/B 1% to A/B to hydroxide Potassium C 50-100% to C 30-50% to hydroxide 175 F Potassium C 50-100% to NR 30% to hydroxide Potassium C 50-100% to A 5% to hydroxide 150 F Potassium iodide No data A to, NR to

Potassium nitrate A to A to 100% to Potassium sulfate A to A to 100% to Resorcinol No data A to Salicylic acid No data A to Salt solution A to A Salt water A to A to A/B Soda ash A to 100% to A to 100% to Sodium A to 100% to A to 100 % to bicarbonate Sodium bichromate No data A to Sodium bidulfite A/C 100% to A to Sodium chlorate C at A to, A/B Sodium chloride A/B to A to Sodium chlorite No data NR > 25% to Sodium cyanide A to A to - B 176-200 F Sodium No data A to ferricyanide Sodium No data A to ferrocyanide Sodium hydroxide A to conc to B 100% to Sodium hydroxide A 1% to conc to NR 100% to Sodium hydroxide A 20% to B 80% to Sodium hydroxide A 20% to C/NR 40-80% to 175 F Sodium hydroxide A 20% to A/C 15-50% to Sodium hydroxide A 20% to NR 15-30% to 150 F Sodium B 100% to A to conc to hypochlorite 130 F Sodium B 100% to B/C 20% to hypochlorite 158 F Sodium B 100% to NR 5% to hypochlorite Sodium nitrate NR A to Sodium sulfates A to 100% to A to 100% to Sodium sulfide A to 100% to A to 100% to Sodium sulfide A to 100% to B 177 F to Sodium sulfite A to 100% to A to 100% to Sodium sulfite A to 100% to A/B to 100% Sodium A <100% A to 100% thiophosphates /AB 125 F to Solvents general No data A/B to Stannic chloride B 50-100% to B 50 A to 100% to 100% to Stannic chloride B 50-100% to A/B Stannous chloride B 15-100% to A to 100% to Stearic acid B to A to, B/C to 158 F Sulfate liquors A/B to A to, B grn. & blk. to Sulfite liquors NR to A to, A 6% to Sulfur chloride C to A to Sulfur dioxide A/B to A to 250 F gas dry Sulfur dioxide B to A to gas wet B/NR to Sulfuric acid NR 25-100% to A to 100% to 158 F Sulfuric acid B/NR 10% to NR 95% to Sulfuric acid B/NR dilute to B 80-90% 176- Sulfuric acid B/NR dilute to NR 80-90% to Sulfuric acid B/NR dilute to A to 70% to

Sulfuric acid B/NR dilute to B 60-70% to Sulfuric acid B/NR dilute to C 60-70% to Sulfuric acid B/NR dilute to A to 50% to Sulfuric acid B/NR dilute to B 50% to Sulfuric acid B/NR dilute to A to 30% to Sulfurous acid NR to A to B Sulfurous acid NR to C/NR to Sulfurous acid NR to A to 75% to Tannic acid B to 100% to A to 100% to Tannic acid B to 100% to A/B Tartaric acid A to A to, A/B Tetrachloroethane NR A Tetrachloroethylene NR A Toluene NR 30% to 100% A to 100 F to to B/C Trichloroethane NR A to 140 Turpentine NR A to 158 F Urea A/B to A to, A/B Vinyl acetate NR A to Vinyl fluoride No data A to Water deionized No data A to, A/B White liquor No data A to Zinc chloride A/B to 100% to A to 100% to Zinc sulfate A to A to 100% to boiling For more information, contact: Flowserve Corporation Flow Control Division Cookeville, Tennessee 38501 (931) 432-4021 Or Consult Your Local Stocking Distributor Ahaus Flowserve GmbH Von Braun Strasse 19 a D-48683 Ahaus Germany 49 2561 686 0 Flowserve Pte. Ltd. 12 Tuas Avenue 20 Singapore 638824 Republic of Singapore 65 862 3332 Printed in U.S.A. November 2001 Flowserve Corporation