The properties of F-21 are similar to those of other fluorinated refrigerants. The development of the fluorinated refrigerants with the manufacture of F-12 which rapidly gained a widespread application in household units and commercial plants. See EPA’s About PDF page to learn more. Methyl chloride is suitable for small refrigerators and domestic units. Although a refrigerant has not been found yet which has all the desirable properties, Freon-12 carbon dioxide and ammonia are commonly used for very low temperature work because of their low boiling points. systems that use Refrigerant R‐717 (ammonia). Applications. It is much less expensive than some other refrigerants. With regard to miscibility with oil F-22 presents the peculiarity that is fully miscible with oil at the temperatures in the high side of the plant, whereas it is only partially miscible at usual evaporating temperatures. These refrigerants are halogen derivates of saturated hydrocarbon i.e., of methane, ethane etc. Thermodynamics, Refrigeration, Refrigerants. Ammonia has no ozone depletion potential (ODP = … It also establishes a system for assigning a safety classification to refrigerants based on toxicity and flammability data, and provides a means of determining the refrigerant concentration limit. It has no effect on oil and greases. They are therefore subject to the same legal regulations as R22 (R22 as transitional refrigerant). ASHRAE considers that the continued use of ammonia is necessary for food preservation and air conditioning. Class A refrigerants are refrigerants for which toxicity has not been identified at concentrations less than or equal to 400 parts per million (PPM) by volume, based on data used to determine threshold limit values (TLV)-time weighted average (TWA) or consistent indices. The safety group classification for each refrigerant has two or three alphanumeric characters (e.g., B1 or A2L). The ammonia is the chemical that is used to absorb the heat from one area, and bring it to another area to dissipate. Properties. Preserving the purity of the ammonia is essential to ensure proper function of the refrigeration system. This group contains oxygen element e.g., ethyl-ether C2H5OC2H6. Mixtures Not applicable SECTION 4: First-aid measures 4.1. The first character shows the toxicity and the numeral, with or without a suffix letter, indicates the flammability. Related … It attacks many non-ferrous metals like copper, zinc, brass etc. It is mostly used for reciprocating compressors. Privacy Policy 9. But for the units used in household refrigerants, there is a wide range of available refrigerants each of which in comparison with others has certain desirable qualities. Contact A-Gas direct on 0215518790; Product Features & Benefits. Close This Box Request a Quote. For this an effective oil separator should always be used. Ammonia refrigeration systems are widely used in industry. Carbon-carbon double bond. Plagiarism Prevention 5. Ammonia has a slight flammable gas classification at level 1; however, it can be ignited easily or have an explosive reaction in the right conditions (aka a large energy source). B1 Some obscure refrigerants like sulfur dioxide B2L Ammonia B2 & B3 Some obscure refrigerants. ANSI/IIAR 3, American National Standard for Ammonia Refrigeration Valves. In certain countries it has been ap­plied in household refrigerators. Refrigerant Concentration Limit / Immediately Dangerous to Life or Health in parts per million (volume per volume) & grams per cubic meter Molecular mass in Atomic mass units Normal Boiling Point (or Bubble & Dew Points for the Zeotrope(400)-series)(or Normal Boiling Point & Azeotropic Temperature for the Azeotrope(500)-series) at 101,325 Pa (1 atmosphere) in degrees Celsius The purpose of the 2L subclass is to reflect the lower flammability properties of the new low-GWP refrigerant options on the rise, such as hydrofluoro-Olefins (HFOs), like R-1234yf and R-1234ze. Water cannot have a content above 33 parts per million (ppm) and oil cannot have a content above 2 ppm. Ammonia has an ASHRAE flammability class of 2L and is classified as non-flammable by the US Department of Transportation 49 CFR. Involving Ammonia Refrigeration System. We can offer product meeting IIAR and/or ASHRAE specifications in a range of cylinders and drum tanks to suit all applications. 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