Description
❄️ SUNISO 4GS Technical data
| Property | Typical Value | ASTM Method |
| ISO Viscosity Grade | VG 68 (or VG 56) | ISO 3448 |
| Kinematic Viscosity @ 40^C | 55 cSt | D445 |
| Kinematic Viscosity @ 100^C | 5.9 cSt | D445 |
| Pour Point | -36^C to -42^C | D97 |
| Floc Point | -48^C to -54^C | ASHRAE 86 |
| Flash Point (COC) | 179^C to 184^C | D92 |
| Dielectric Strength | 40 kV (Typical) | D877 |
| Density @ 15^C | 0.916 kg/L | D4052 |
✨ Features
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Naphthenic Mineral Oil Base: Manufactured from selected naphthenic crude oils for inherent low wax content.
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Excellent Stability: Offers high chemical stability (resists reaction with refrigerants) and thermal stability (resists breakdown from high heat), minimizing sludge and deposit formation.
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Very Low Floc Point: Crucially, its low Floc Point (where wax separates) ensures the oil remains wax-free in the evaporator, even at extremely low temperatures, preventing system clogging.
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High Dielectric Strength: Provides excellent electrical insulation, essential for use in hermetic and semi-hermetic compressors where the oil contacts the motor windings.
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Proper Viscosity (VG 68/56): A medium viscosity grade that ensures a strong protective oil film at high operating temperatures while remaining fluid enough for effective circulation at low temperatures.
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Compatibility: Highly compatible with chlorine-containing refrigerants like HCFCs (R-22, R-123) and CFCs (R-12, R-502). Also suitable for many Natural Refrigerants (e.g., R-717, R-290, R-600a).
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