What are the different oils used?

Different oils used

Mineral Oils

These are simple refined products made direct from crude oil. Most mineral oils utilised in refrigeration are Napthenic type oils. Viscosities are normally rated at 22; 32; 68; 100 for use on most systems from - 40 C to + 15 C. Thinner viscosities are also available for very low temperature systems. Common Grades of Mineral Oil in use are … Suniso 3GS (ISO 32); 4GS (ISO 68); 5 GS (ISO 100) Texaco Capella WF (I) 32; 68 Shell Clavus 32; 46; 68 Castrol Icematic 266 (ISO 32); 299 (ISO 68) Mobil Arctic 155 (ISO 32); 300 (ISO 68) Alkyl Benzene Oils These are synthetically produced oil with very similar characteristics to mineral oils, however they are claimed to have improved lubricative qualities. Common Grades are … Texaco ROLT 46 (ISO 46 is a common mid-grade) Shell SD (this is actually a mixture of mineral and Alkyl Benzene) Mobil Arctic SHC424 (ISO 46) Esso Zerice S46; S68; S100 Polyolester Oils These are fully synthetic oils produced in a totally different manner to traditional Mineral oils. As illustrated above they are the commonest choice of lubricant for HFC type refrigerants. These oils use the same ISO grading system as Mineral / AB types, however they tend to be more viscosity stable and may offer improved lubricative qualities to the compressor in extreme situations. Typical Grades are … ICI Emkarate RL32s RL68s Mobil EAL Arctic 22; 32; 46; 68 EAL - Environmental Awareness Lubricant ThermaCom does not recommend Arctic 22 for use with metalled bearings: Castrol Icematic SW 32; 68; 100