CGA Selection Charts - CONCOA

1 It is recommended that the user thoroughly familiarize himself with the specific properties of these Compressed Gas Association (CGA) has selected and standardized the valve outlet to be used on each gas cylinder. These standards, contained in the document CGA STANDARD V-1, Compressed Gas Cylinder Valve Outlet Connections" , have been adopted to prevent the inadvertent mixing of gases which could be reactive and to avoid other possible misuse above chart may be used for guide purposes only. Consult your gas supplier to determine the actual CGA connection required when ordering a regulator.*Exceptions: Flammables in Air or Oxidizers*Propane in air, methane in air, carbon monoxide in air: CGA 590 Since the combined characteristics of a mixture of gases often differ from the properties of the separate components, different CGA connections are often required.

2 The chart above can be used as a reference for the CGA which use the same CGA connection as if the minor component were in its pure gas form have not been included for the sake of brevity. The proper fitting for these mixtures can be determined by looking up the minor component on the chart for pure Gases CGA Selection Chart for FittingsCGA Fittings RequiredPure Gases510/300 Acetylene590/346/347/702 Air240/660/705 Ammonia580/680/677 Argon350 Arsine*320 Carbon dioxide350 Carbon monoxide660 Chlorine510 Cyclopropane350 Deuterium350 Ethane350 Ethylene510 Ethylene oxide580/680/677 Helium350/695/703 Hydrogen330 Hydrogen chloride330 Hydrogen sulfide580 Krypton, kr-85350/695/703 Methane510 Methyl chloride580/680/677 Neon580/680/677 Nitrogen326 Nitrous oxide540/577/701 Oxygen*350 Phosphine510 Propane350 Silane*668/660 Sulfur dioxide590 Sulfur hexafluoride580/680/677 XenonMixed Gases CGA Selection Chart for FittingsCGA Fittings RequiredMixed GasesMinor Component in Major Component240/660/705 AmmoniaNitrogen350 ButaneNitrogen296 Carbon DioxideOxygen580 Carbon DioxideHelium or nitrogen580 Carbon Dioxideand/or NitrogenHelium330 ChlorineNitrogen350 DiboraneArgon, helium ,Hydrogen, nitrogen580 Freon-12 Nitrogen296 HeliumOxygen350 HexaneNitrogen350 IsobutaneNitrogen350 Krypton-85 Carbon monoxide,Hydrogen or methane330 Krypton-85 Chlorine540 Krypton-85 Oxygen580 MoistureArgon.

3 helium orNitrogen660 Nitric OxideNitrogen660 Nitrogen DioxideAir or nitrogen590 Nitrous OxideNitrogen590 OxygenNitrogen or helium350 Propane*Nitrogen or helium660 Sulfur DioxideAir or nitrogen590 Sulfur HexafluorideArgon, helium or Nitrogen350 Sulfur HexafluorideHydrogen350 TritiumArgon, carbon dioxide, hydrogen, methane, neon, nitrogen, krypton, or xenonCGA Selection ChartsReference TablesPure Gases CGA Selection Chart for FittingsMixed Gases CGA Selection Chart for Fittings