Methylphenyl Polysiloxane
Quantity:
Silway 642
Silway 642 Fluid is available in a viscosity range of 50 to 30,000 cs, Silway 649 Fluid has a viscosity of 125 cs and Silway 653 Fluid has a viscosity of 500 cs.
Features & Benefits
- Heat resistance
- High flash points
- Low volatility
Typical Applications
- Hydraulic arrestors (snubbers)
- Hydraulically actuated valves and instruments used in nuclear plants
- Base oil for high-temperature grease
- Impregnation for power capacitors
Typical Physical Properties
Property | Unit | Silwa 642 | Silwa 649 | Silway 653 |
Viscosity at 25°C (77°F) | cs | 50, 100, 500, 30,000 | 125 | 500 |
Specific Gravity at 25°C (77°F) | — | 0.985, 0.992, 0.997, 0.990 | 1.07 | 1.11 |
Flash Point, °C (°F), Minimum | °C (°F) | 274 (525) | 308 (586) | 302 (575) |
Fire Point, Estimated | °C (°F) | > 343 (> 650) | > 343 (> 650) | > 343 (> 650) |
Autoignition Temperature, Estimated | °C (°F) | 482 (900) | 482 (900) | 487 (910) |
Pour Point, Estimated | °C (°F) | -57 (-70) | -50 (-58) | -22 (-8) |
Volatile Content, % by weight after 4 hr at 250°C (482°F) | wt% | 2.5 | 2.1 | 3.0 |
Refractive Index (25℃) | — | 1.420–1.430 | 1.490–1.500 | 1.530–1.538 |
Packing
200L or IBC tank
Storage
Being storage in closed containers
Shelf Life
36 months
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