It offers a range of benefits, including excellent lubricity and long service life with a wide operating temperature range suitable for continuous use at typical turbo pump operating temperatures.
AP303 also has low vapour pressure, meaning that it will not readily evaporate in operation.
AP303 is a proven and robust lubricating oil. Manufactured from a high quality polyol ester base stock it:
- provides excellent lubrication
- is a robust liquid which offers a long service lifetime
- exhibits a low vapour pressure of 3.1 x 10-7 Torr at 80°C
- is silicone and halogen free
- is easy to clean and remove during servicing as it is soluble in hydrocarbon solvents
- Available to buy in 1 litre containers.
AP303 Turbo Pump Oil Typical Properties:
| Typical Property | Unit | Test Method | AP303 |
|---|---|---|---|
| Colour | HU | ISO 2211 | 125 |
| Density at 20°C | kg/dm3 | ISO 3675 | 0.97 |
| Kinematic Viscosity at 40°C | mm2/s | ISO 3104 | 29 |
| Kinematic Viscosity at 100°C | mm2/s | ISO 3104 | 5.3 |
| Viscosity Index | – | – | 116 |
| Flash Point | °C | ISO 2592 | 260 |
| Pour Point | °C | ISO 3016 | <-50 |
| RPVOT | min | ASTM D2112 | 397 |
| 4 Ball Wear Scar Diameter | mm | ASTM D4172 | 0.72 |
| Vapour Pressure @ 80°C | Torr | – | 3.1×10-7 |
AP303 is used in turbomolecular pumps with conventional bearings which require a high grade lubricant with low vapour pressure. High-speed bearings such as these, with a low bearing load, require oil with a low viscosity.
AP303’s polyol ester formulation provides excellent lubricity along with good resistance to ageing, which provides a long service life. It is advised to degass the turbo oil before use to shorten pumping time and prevent foaming.
Vapour Pressure Graph of AP303 Oil
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