NOTE: All orders entered using this Guide must state actual fluid, fluid pressure and fluid temperature of the application. Actual fluid is extremely important when elastomer options are specified because other substitutions may be required.      ASCO valves are available to control many acids, alcohols, bases, solvents, and corrosive gases and liquids. Modified or special designs are sometimes required depending upon the application.      Corrosion occurs either as a chemical or

electrochemical reaction. Therefore, consideration must be given to both the galvanic and electromotive force series, as well as to pressure, temperature, and other factors that might be involved in the application.      This Guide provides information on types of valves that are available for most common corrosive and non-corrosive gases and liquids.      This Guide is not intended as a specific recommendation; factors beyond our control could affect valve operation or materials.

General Information on
Elastomer Materials

BUNA "N" Buna "N" is commonly referred to as a nitrile rubber, and is ASCO's standard synthetic elastomer for accomplishing resilient-type seating or sealing. It has excellent compatibility for most air, water and light oil applications. It has a useful temperature range of 0°F (-18°C) to 180°F (82°C). NEOPRENE Neoprene is principally used as an external seal in refrigeration applications. It is also utilized for oxygen service. It has a useful temperature range of 0°F (-18°C) to 180°F (82°C). ETHYLENE PROPYLENE Ethylene Propylene is selected for

applications which are above the Buna "N" temperature range such as handling hot water and steam. Ethylene propylene has an extremely wide range of fluid compatibility but has the distinct disadvantage that it cannot be used with petroleum-based fluids or fluids so contaminated (such as lubricated air). It has a useful temperature range of -10°F (-23°C) to 300 °F (149°C). VITON*/FLUOREL**, ETC. Viton is a fluorocarbon elastomer which was primarily developed for handling hydrocarbons such as jet fuels, gasolines, solvent, etc., which normally caused detrimental swelling to Buna "N". Viton has a high temperature range similar to ethylene propylene but has the advantage of

being somewhat more resistant to "dry heat." Viton has a rather wide range of chemical compatibility. It has a useful temperature range of 0°F (-18°C) to 350°F (177°C). TEFLON* Teflon and teflon with fillers are considered more of a plastic than a resilient-type material. They are virtually unattacked by any fluid. Their temperature usage has ranged from disc for cryogenic valves to discs for steam valves. They are not easily fabricated and are known to have "cold flow" characteristics which may contribute to objectionable leakage particularly on gases.   * DuPont Co. trademark ** 3M trademark

2 and 3 way Solenoid and Air-Operated Valves Available for Handling Various Fluids
Fluids	Qualifying Service Information	Material of Construction and Ordering Information
Acetic Acid	Pure liquid (galial) not as corrosive as diluted.	Stainless steel normally closed valves except with ethylene propylene elastomers. Add suffix "E" to catalog number.
Acetone	Flammable solvent. Not corrosive to most metals.	Standard catalog valves except with ethylene propylene elastomers. Add suffix "E" to catalog number. Teflon or metal seated valves also used.
Acetylene	Colorless gas. Highly flamable. Used in welding and cutting equipment. If moisture is presnet, copper, silver, and alloys containing more than 66% copper are not suitable.	Standard catolog aluminum, brass, steel or stainless steel valves, and spcify aluminum shading coil. Do ot use bar stock brass valves.
Air, Lubricated	Most sources of air carry lubrication from pumps and other equipment. Others are directly lubricated in lines.	Standard resilient seated catolog valves. For synthetic diester lubricating oils, Viton seats may be required.
Air (or Gas), Dry, Unlubricated	Used in instrument air applications and telephone lines where moisture and oil cannot be tolerated.	Special constructions required. Refer to Long Life Solenoid Valve Constructions.
Alcohols Ethyl alcohol (Denatured Alcohol)	A grain alcohol commonly used as a solvent. Also used as a radiator antifreeze and rocket fuel	Standard resilient seated catalog valves.
Methyl Alcohol (Methanol)	A flammable wood alcohol used in automotive antifreeze, general solvent, aviation and rocket fuel.	Standard catalog constructions; however, where high purity or liquid essential, use stainless steel designs.
Ammonia (Anydrous or Dissociated)	Used in refrigeration and many other applications. Presence of slight trace of water moisture can be harmful to brass.	Stainless steel or steel construction with aluminum shading coil and neoprene elastomers are required. Specify aluminum shading coil. Add prefix "X" and suffix "J" to catalog number.
Argon	The valves must be free of containments when filling incandescent lamps, luminescent tubes, gas thermometers, etc. Also used as an inert shielding gas in welding equipment.	Standard catalog aluminum and brass valves used in connection with welding equipment. Most other applications require stainless steel valves, specially cleaned to avoid contamination. Specify AP-1-005.
Benzene-Benzol	Coal-tar solvent or additive to motor fuels. Attacks most elastomers.	Standard catalog valves with Viton disc and gasket; add suffix "V" to catalog number.
Butane	One of the principal LP gases. Used as fuel for household and other industrial purposes. Also a refrigerant and a propellant in aerosol cans.	Special construction required. Refer to Combustion Section.
Carbon Dioxide (Gas or Liquid) (CO2)	Used in industrial refrigeration, refrigeration of foods and carbonated beverages. Also, as a fire extinguisher and inert atmosphere in welding equipment.	For gas pressures below 100 psi, use standard valves with Buna "N" discs.
		Above 100 psi use Series 8264, specially designed for this service.
Carbon Tetrachloride ("Carbona")	Mainly used as a metal degreasing agent. Also used in fire extinguishers. It is a general solvent and dry-cleaning medium. It is toxic and should be handled in well-ventilated areas.	Standard catalog brass valves except with Teflon or Viton discs. Add suffix "T" or "V" to catalog number. Diaphragm valves must be equipped with Viton parts; add suffix "V" to catalog number. Metal seated valves also used.
Caustic Soda (Sodium Hydroxide)	Used in pulp and paper industry. Included in detergents and soap. Also in textile processing. Solutions range between 50% and 73% commercial.	Stainless steel valves except with ethylene propylene elastomers. Add suffix "E" to catalog number. Stainless steel or Teflon seated valves also used.
Cellulube	One of the phosphate ester lubricating fluids which are fire-resistant.	Standard catalog designs except with ethylene propylene elastomers. Add suffix "E" to catalog number. Stainless steel or Teflon seated valves also used.
Chlorine		Use appropriate ball valve with ASCO 4 way auxiliary air pilot valve.
City Gas Natural Gas	Common heating fuel.	Refer to Combustion Section.
City Gas Manufactured Gas	Refined coke oven gas used in city applications.	Refer to Combustion Section.
Coffee	Automatic or semi-automatic dispensing equipment.	Stainless steel or plastic valves.
Coke Oven Gas (Bench Gas; Coal Gas)	Flammable gas used in domestic and industrial heating.	Standard steel or stainless steel valves with Buna "N" elastomers.
Coolant Oil	Oils used in automatic screw machines and related equipment as cutting oils or coolants. Usually contain suspended solids.	Consult PSI
Diesel Fuel	Petroleum oil used as fuel for diesel engines.	Standard resilient seated catalog valves, except with Viton seating. Add suffix "V" to catalog number.
Ethylene Glycol ("Prestone")	Used in permanent antifreeze solutions, brake fluids, and as a dye solvent.	Standard resilient seated catalog valves.
Ethylene Oxide	A colorless gas at ordinary temperatures and extremely flammable. Used in steiling and fumigating, and as an additive to gasoline. Has tendency to swell most elastomers and should not be used with brass, copper or silver; the combination is explosive.	Steel or stainless steel valves with metal-to-metal seating. Maximum internal leakage is 90 cc./min. Specify aluminum shading coil.
"Freon" Refrigerants		Consult PSI
"Freon" Solvents "MF", "TF", and "BF"	Trademark for a solvent which is commonly used in ultrasonic degreasers for removing oil, common grease and dirt on metal or plastic parts.	Standard catalog items with metal-to-metal seating, or Buna "N" elastomers only.
Fuel Oil (Light) Nos. 1, 2, 3	"Distillate" petroleum oil used in combustion applications without preheating.	Refer to Combustion Section.
Fuel Oil (Heavy) Nos. 4, 5, 6	Heavy "Bunker" fuel oil. Usually preheated to 135°F, or more for combustion.	Refer to Combustion Section.
Gasoline	Special or hi-test gasolines have additives or aromatics that affect synthetic rubber by excessive swell or extraction of plasticizers.	Standard catalog valve constructions except with Viton elastomers. Add suffix "V" to catalog number. Metal seated valves also used.
Helium	An inert gas used in heat treating, purging and welding.	Standard resilient seated catalog valves.
Hydraulic Oil	Petroleum base only- viscosity usually 50 SSU or 300 SSU. For fire-resistant hydraulic oils see Cellulube, Pydraul, and Skydrol.	Standard resilient seated catalog valves.
Hydrochloric Acid	Corrosive chemical.	Use an appropriate ball valve with ASCO 4 way auxiliary air pilot valve. For low pressure and small flow refer to Shielded Core Valves.
Hydrogen	A highly flammable gas when exposed to air.	Standard catalog valves with soft seats.
Hypo (Photographic Solution)	Also known as sodium thiosulfate. Most metals corrode sufficiently to cause solution contamination.	For low pressure and small flow refer to Shielded Core Valves.
Jet Fuels (JP1 through 8) For others consult PSI	These fuels are in jet engines and are petroluem products similar to kerosene. Some jet fuels contain substantial quantities of aromatics which affect mos sythetic rubbers.	Standard catalog valves with Viton elastomers. Add suffix "V" to catalog number. Teflon and metal seated valves also used.
Kerosene (Kerosine)	Generally used as a solvent for cleaning purposes and as a heating fuel.	Standard resilient seated catalog valves.
LP Gas	Commonly used in grain dryer applications.	Refer to Combustion Section.
Liquid Natrual Gas, Nitrogen and Oxygen		Refer to Cryogenic Valves.
Manufactured Gas	Refined coke oven gas used in city applications.	Refer to Combustion Section.
Mercury	Uses: Mercury cells and other electrical apparatus; mercury vapor boilers, lamps, barometers, thermometers, etc.	Use stainless steel body. Valve must be mounted upside down. Special construction required. Consult PSI
Methyl Ethyl Ketone (MEK)	Used in laquers, paint removers, cements and adhesives. It is a flammable liquid.	Standard catalog valves except with ethylene propylene elastomers. Add suffix "E" to catalog number. Teflon or metal seated valves also used.
Naptha	A coal-tar solvent.	Standard resilient seated catalog valves.
Natural Gas	Common heating fuel.	Refer to Combustion Section.
Nitric Acid	Normally concentrations are 60% nitric acid and 40% water. This solution and red fuming, which is more than 86% nitric acid, and are fairly easily handled with all stainless steel valves. White fuming, which is pure to 97.5% acid, and nitric acid vapors are very difficult to handle.	Stainless steel valves with aluminum shading coil and Teflon disc. (Add suffix "T" to catalog number.) Metal seated valves also used. Maximum temperature at which we can offer valve is 100°F. Specify aluminum shading coil. For white fuming acid, use appropriate ball valve with ASCO pilot.
Nitrogen	An inert gas used in heat treating, purging and welding.	Standard resilient seated catalog valves.
Oils, Lubricating or Motor	Common motor oils known as SAE oils and synthetic lube oils, etc.	Standard catalog valves for 300 SSU maximum. For higher SSU consult PSI For compressor service involving refrigerants, consult PSI for elastomer selection.
Oxygen, Gas	Used in conjunction with various fuels in furnaces, ovens, cutting torches, and welding and heat treating. A non-flammable gas, but contact with hydrocarbons will result in spontaneous combustion.	Metal body valves with Viton or neoprene elastomers specially cleaned to avoid contamination with hydrocarbons. Add suffix "N" to catalog number.
Perchloroethylene ("PERK")	Same as tetrachloroethylene. Used as a dry-cleaning solvent and in vapor degreasing eqiupment.	Standard catalog items except with Viton elastomers. Add suffix "V" to catalog number. Special piston valves available. Do not use diaphragm valves.
Phosphoric Acid	Used in pickling and rust-proofing metals, soft drinks, and flavoring syrups, as well as pharmaceuticals.	Use appropriate ball valve with ASCO 4 way auxiliary air pilot valve.
Photographic Solution	Also known as sodium thiosulfate or hypo. Most metals corrode sufficiently to cause solution contamination.	For low pressure and small flow refer to Shielded Core Valves.
Potassium Sulfate	Used in fertilizers. Also in alum and glass manufacturing.	Standard stainless steel catalog valves.
Propane Gas	One of the principal LP gases commonly used in grain dryer applications and as bottled gas for heating and cooking.	Refer to Combustion Section.
Pydraul ("Monsanto")	A trademark for a series of fire-resistant hydraulic fluids. Used in automatic welding machines, hydraulic presses and air compressors. Also used in die-casting machines and forgina and extrusion presses.	Standard catalog items except with Viton elastomers. Add suffix "V" to catalog number. Teflon or metal seated valves also used.
Skydrol	A trademark for fire-resistant jet aircraft hydraulic fluid.	Standard catalog items except with ethylene propylene elastomers. Add suffix "E" to catalog number. Teflon or metal seated valves also used.
Sodium Hydroxide (Caustic Soda)	Used in pulp and paper industry. Included in detergents and soap. Also in textile processing. Solutions range between 50% and 73% commercial.	Stainless steel valves except with ethylene propylene elastomers. Add suffix "E" to catalog number. Stainless steel or Teflon seated valves also used.
Sodium Thiosulfate (Photographic Solution)	Also known as hypo. Most metals corrode sufficiently to cause solution contamination.	For low pressure and small flow refer to Shielded Core Valves.
Sour Gas	Flammable gas used in domestic and industrial heating.	Standard steel or stainless steel valves with Buna "N" elastomers.
Steam Condensate	This is return condensate from steam boilers which has various degrees of dissolved carbon dioxide or oxygen. Temperature is normally high to boiling point.	Brass valves suitable except with ethylene propylene elastomers. See Series 8210 and 8222 Hot Water Service Listings. (Use suffix "E" on all others.)
Stoddard Solvent	This is a dry-cleaning solvent of usually high purity naptha, clear and free of undissolved water. A coal-tar solvent.	Standard catalog items.
Sulfuric Acid		Use an appropriate ball valve with ASCO 4 way auxiliary air pilot valve. For low pressure and small flow refer to Shielded Core Valves.
Toluene (Toluol)	One of the coal-tar solvents. Used in aviation and high octane gasolines. Also a solvent for paints, coatings, resins, etc. It is a flammable liquid.	Standard catalog valves except with Viton disc and gasket; add suffix "V" to catalog number.
Trichloroethylene ("Carbona")	Common degreasing solvent, non-combustible, but very toxic. Requires adequate ventilation.	Standard brass catalog valves, if dry, except use Viton elastomers (add usffix "V" to catalog number). If moisture is present, use stainless steel. Metal and Teflon seated valves also used.
Turpentine	Solvent or thinner for paints, varnishes and lacquers. Also, a rubber solvent and reclaiming agent. The liquid is volatile.	Standard resilient seated catalog valves.
Vacuum		Refer to Vacuum Valves.
Vegetable Oils	Edible oils extracted from seeds, fruits, or plants, such as peanut oils, cottonseed oils, etc.	Standard resilient seated catalog valves. For FDA approved elastomers consult PSI.
Vinegar	A dilute impure solution of acetic acid	Stainless steel valves except with ethylene propylene elastomers. Add suffix "E" to catalog number. For FDA approved elastomers consult PSI.
Water, Boiler Feed	Commonly treated water with inhibitors to avoid corrosion of boiler tubes.	Standard stainless steel catalog valves.
Water, Distilled or Deionized	A purified water, sometimes called deionized water, neutral and free from contaminants.	Stainless steel valves except with ethylene propylene elastomers. Add suffix "E" to catalog number. Teflon and metal seated valves also used.
Water, Fresh		Standard resilient seated catalog valves. However, aerated water which is slightly acidic will cause seat erosion by process known as dezincification. Stainless steel or plastic valves should then be selected.
Water, High Pressure	When handling water to, generally, above 500 psi, erosino and water hammer must be considered.	Special deisgns for car wash applications, etc. Consult PSI
Water, Hot	Water above 200°F often flashes to steam due to regulators or other line restrictions. Below 200°F, this change of state is unlikely.	Standard catalog designs suitable to temperatures listed in catalog. Also see Series 8210 and 8222 Hot Water Service Listings. For temperatures exceeding those listed, consult PSI
Water, Sea, Brine, Brackish	difficult to handle due to galvanic corrosion.	Use appropriate ball valve with ASCO air pilot valve.

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