Description
❄️ Suniso SL 46 Technical Details
| Property | Value (Typical Analysis) | Unit | ASTM Method (Common) |
| Type | Polyol Ester (POE) | N/A | N/A |
| ISO Viscosity Grade (VG) | 46 | N/A | ISO 3448 |
| Kinematic Viscosity @ 40°C | 46.1 – 47.2 | cSt (mm^2/s) | D445 |
| Kinematic Viscosity @ 100°C | 6.9 – 7.2 | cSt (mm^2/s) | D445 |
| Viscosity Index (VI) | 112 – 120 | N/A | D2270 |
| Density @ 15°C | 0.970 – 0.981 | kg/L | D4052 |
| Pour Point | -44 / -47 to -48 / -54 | ^C/ ^F | D5950 / D97 |
| Flash Point | 235 / 455 to 253 / 487 | ^C / ^F | D92 |
| Water Content (Moisture) | < 100 | ppm | D6304 |
| Acid Value | < 0.1 | mg KOH/g | D974 (Modified) |
🌟 Key Features of Suniso SL 46 (POE)
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POE Synthetic Base: It is a fully synthetic Polyol Ester (POE) lubricant, essential for chemical compatibility and stability with modern HFC and HFC/HFO blend refrigerants.
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Lighter Viscosity (ISO VG 46): This medium-light grade is optimized for high-speed compressors, especially modern scroll and rotary types, where quick oil circulation and low viscous drag are important for energy efficiency.
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HFC and HFO Compatibility: Fully compatible and chemically stable with major HFC refrigerants including the widely used R-410A (a common pairing for this grade), R-134a, R-404A, R-407C, and new HFO blends.
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Exceptional Oil Return (Miscibility): Due to its lighter body and excellent miscibility with HFCs, it achieves rapid and efficient oil return from the evaporator. This prevents oil logging, maintains system efficiency, and ensures continuous compressor lubrication.
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Superior Low-Temperature Fluidity: It boasts an exceptionally low Pour Point (as low as -48^C). This makes it ideal for freezing applications and ensures the oil remains highly fluid in all parts of the system, preventing congealing and system blockages.
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High Thermal Stability: Maintains good Thermal Stability (Flash Point 235^C), which helps minimize breakdown and the formation of carbon deposits/sludge at the compressor’s hot discharge valves.
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Viscosity Index: Has a high Viscosity Index (VI approx 112-120), meaning its viscosity changes less with temperature swings compared to mineral oils.
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