Posi-Flate Butterfly Valve
16Pages

butterfly valves Seat Selection Guide Choosing a Suitable Elastomer

Selecting a Posi-flate Seat Elastomer Before selecting a Posi-flate seat, the following factors must be considered. 1. Temperature: Physical characteristics and chemical resistance of elastomers are affected by the operating temperature of the part in use. Each Posi-flate seat is tested and rated for a minimum and maximum operating temperature. This is determined by the elastomer’s resistance to compression set, rebound and tensile strength. 2. Pressure: Posi-flate seats are designed for specific pressure ranges. For each Posi-flate application, the required seat inflation pressure must be...

General Chemical Resistance of Elastomers COMPOUND CHEMICAL GROUP Butadiene Acrylonitrile Copolymer Many Hydrocarbons, Fats, Oils, Greases, Hydraulic Fluids, Chemicals Ozone Ketones, Esters, Aldehydes, Chlorinated and Nitro Hydrocarbons Urethane Polymer Ozone, Hydrocarbons, Moderate Chemicals, Fats, Oils, Greases Concentrated Acids, Ketones, Esters, Chlorinated and Nitro Hydrocarbons Ethylene Propylene Copolymer and Terpolymer Animal and Vegetable Oils, Ozone, Strong and Oxidizing Chemicals Mineral Oils and Solvents, Aromatic Hydrocarbons Fluorocarbon Polymer All Aliphatic, Aromatic and...

Posi-flate Elastomer Profiles Polyurethane Chemical Definition: Polyester/Polyether Urethane Compression Set: Good Abrasion Resistance: Excellent Solvent Resistance: Fair Oil Resistance: Good Operating Temperature: 32° F to 150° F Operating Pressure: 40 PSIG to 115 PSIG Aging Weather - Sunlight: Excellent Comments: • Wear resistance is excellent and greatly superior to most other polymers. • Oil resistance is good and equivalent to the better nitriles. • Good ozone resistance. EPDM Chemical Definition: Ethylene Propylene Compression Set: Good Abrasion Resistance: Excellent Solvent...

Posi-flate Elastomer Profiles Fluoroelastomers Chemical Definition: Fluorinated Hydrocarbon Compression Set: Excellent Abrasion Resistance: Good Solvent Resistance: Excellent Oil Resistance: Excellent Operating Temperature: 50° F to 200° F Operating Pressure: 40 PSIG to 55 PSIG Aging Weather - Sunlight: Excellent Comments: • Excellent in severe environments due to their comparatively long useful service life. • Outstanding resistance to a wide range of solvents and petroleum based oils. • Excellent heat resistance. • Not be used in contact with ketones. Silicone Chemical Definition:...

Elastomer and Chemical Compatibility Chart On the following pages is an Elastomer and Chemical Compatibility Chart. The Rating System is as follows: A = Excellent B = Good C = Fair to Poor U = Do not use - = No data or insufficient evidence. BUNA-N POLYURETHANE EPDM FLUOROELASTOMER SILICONE Acetic Acid, Glacial C U A C B

Elastomer and Chemical Compatibility Chart A = Excellent C = Fair to Poor BUNA-N - = No data or insufficient evidence. epdm Beet Sugar Liquors A - A A Benzene U U U A Benzenesulfonic Acid - - - A Benzaldehyde U U A U Benzyl Alcohol U - B A Benzyl Benzoate - - B A Benzyl Chloride U - - A Benzoic Acid - - - A Blast Furnace Gas U - - A Bleach Solutions - - A A Borax B A A A Bordeaux Mixture - - A A Boric Acid A A A A Brine A - A - Bromine - Anhydrous - - - A Bromine Triflouride U U U U Bromine Water - - - A Bromobenzene U U U A Bunker Oil A B - A Butadiene U U C B Butane A A U A Butter A A A A...

Elastomer and Chemical Compatibility Chart _ A = Excellent B = Good C = Fair to Poor U = Do not use - = No data or insufficient evidence. BUNA-N POLYURETHANE EPDM FLUOROELASTOMER SILICONE Chrome Plating Solutions U U U A B

Elastomer and Chemical Compatibility Chart A = Excellent C = Fair to Poor BUNA-N - = No data or insufficient evidence. epdm Diesel Oil A B U A Diethlamine C C B U Diethyl Benzene U U U A Diethyl Ether U A U U Diethylene Glycol A U A A Diethyl Sebecate U - B B Diisobutylene B - - A Diisopropyl Benzene U - U A Diisopropyl Ketone U - A U Dimethyl Aniline - - B U Dimethyl Formamide B - - U Dimethyl Phthalate U - B B Dinitrotoluene U - U C Dioctyl Phthalate - - B B Dioctyl Sebecate U B B B Dioxane - - B - Dioxolane U - B - Dipentene B - - A Diphenyl - - - A Diphenyl Oxides - - A A Dowtherm Oil -...

Elastomer and Chemical Compatibility Chart A = Excellent C = Fair to Poor BUNA-N - = No data or insufficient evidence. epdm Ferric Sulfate A - A A Fish Oil A - - A Fluoroboric Acid A - A - Fluorine (liquid) - - C B Fluorobenzene U - U A Fluorocarbon Oils - - A - Fluorolube A - A B Fluorinated Cyclic Ethers - - A - Fluosilicic Acid A - - - Formaldehyde B U A A Formic Acid B U A C Freon 11 A U U A Freon 12 A A B B Freon 13 A - A A Freon 21 U - U U Freon 22 U U A U Freon 31 U - A U Freon 32 A - A C Freon 112 B - U A Freon 113 A B U B Freon 114 A A A B Freon 115 A - A B Freon 142b A - A U Freon...

Elastomer and Chemical Compatibility Chart A = Excellent B = Good C = Fair to Poor U = Do not use = No data or insufficient evidence. Hydrochloric Acid (cold) 37% B Hydrofluoric Acid (cone.) hot U Hydrofluoric Acid (cone.) cold U Hydrofluoric Acid-Anhydrous Hydrogen Sulfide (wet) (cold) U Lubricating Oils (Petroleum) A Maleic Acid Maleic Anhydride

Elastomer and Chemical Compatibility Chart A = Excellent C = Fair to Poor BUNA-N - = No data or insufficient evidence. epdm Mercuric Chloride A - A A Mercury A A A A Mesityl Oxide U - B U Methane A B U A Methyl Acetate U - B U Methyl Acrylate U - B U Methylacrylic Acid - - B B Methyl Alcohol A U A C Methyl Bromide B - - A Methyl Butyl Ketone U - A U Methyl Cellosolve - - B U Methyl Chloride U - C A Methyl Cyclopentane - - U A Methylene Chloride U U U B Methyl Ethyl Ketone U U A U Methyl Formate U - B - Methyl Isobutyl Ketone U - C U Methyl Methacrylate U - U U Methyl Oleate U - B A Methyl...

Elastomer and Chemical Compatibility Chart A = Excellent C = Fair to Poor BUNA-N - = No data or insufficient evidence. epdm Olive Oil A A B A o-Dichlorobenzene U - - A Oxalic Acid B - A A Oxygen - cold B A A A Oxygen - 200-400° F U U U B Ozone U A A A Paint Thinner, Duco - - U B Palmitic Acid A A B A Peanut Oil A B C A Perchloric Acid - - B A Perchloroethylene C U U A Petroleum - Below 250 A B U A Petroleum - Above 250 C U U B Phenol - U B A Phenylbenzene U - U A Phenyl Ethyl Ether U - U - Phenyl Hydrazine U - C A Phorone - - B - Phosphoric Acid - 20% B A A A Phosphoric Acid - 45% U A B A...