- Screw compressors
- Gas compressors & vacuum
ISO VG 46
Alkylbenzene synthetic oil for HCFC refrigeration compressors, down to −60 °C
| Property | Typical value | Method |
|---|---|---|
| Acid numbermgKOH/g | 0.05 | ASTM D974 |
| Copper strip corrosion, 3 h, 100 CRating | 1 | ASTM D130 |
| Flash point, Cleveland Open Cup°C | 154 | ASTM D92 |
| Kinematic viscosity @ 40 Cmm2/s | 46 | ASTM D445 |
| Pour point°C | -30 | ASTM D97 |
| R12 Flocculation point°C | -60 | AMS 100.42 |
| Waterppm | <30 | ASTM D1533 |

Mobil Zerice S 46 is a premium quality synthetic refrigeration compressor lubricant based on alkyl benzenes, in ISO VG 46, from the Mobil Zerice S series. Its chemical nature gives it superior miscibility with hydrochlorofluorocarbon refrigerant (R22), enabling use in very low temperature applications down to -60°C; in certain circumstances it can also be used in compressors where ammonia is the refrigerant. Compared with mineral and other synthetic lubricants, it offers superior solubility with halocarbon refrigerants, helping to avoid oil separation and congealing on valves and heat transfer surfaces. It has very low pour and floc points, helping prevent harmful wax precipitation that could block expansion valves and heat transfer surfaces, while its synthetic base provides excellent chemical stability against reaction with refrigerants and high thermal stability that resists oil breakdown, supporting long oil service life. It is recommended for all types of refrigeration compressors — reciprocating or rotary screw — and is well suited to hydrochlorofluorocarbon refrigerants and, in certain equipment builders' compressors, ammonia. It should not be used with sulfur dioxide or R134A refrigerants; the viscosity grade should be selected per the compressor manufacturer's recommendation. Mobil Zerice S 46 has a kinematic viscosity of 46 mm²/s at 40°C, an R12 flocculation point of -60°C (AMS 100.42), a pour point of -30°C and a flash point of 154°C.
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