Solely manufactured by M&I Materials Limited in a purpose built factory in the UK, it is widely regarded as being far superior to other low quality imitation vapour booster fluids. Some pump manufacturers who specify the use of AP201 will even warn that using other fluids can actually invalidate their warranties.
AP201 is a hydrocarbon based vapour booster pump oil which provides:
- Excellent oxygen stability
- Minimal tarry deposits
- Easier and faster cleaning and servicing
- Longer service life of the oil
- Reduction in top ups and backstreaming
- Superior and quicker ultimate vacuum
- High purity & very low vapour pressure
- Available to buy in 4, 20, and 200 litre containers.
Apiezon AP201 Properties table:
| Properties | Test Method | Apiezon AP201 | |
|---|---|---|---|
| Vapour pressure @ 20°C/68°F, torr | (a) | 4 x 10-6 | |
| Vapour pressure @ 165°C/320°F, torr | (a) | 1 | |
| Relative density @ 20°C/68°F | IP 190 | 0.885 | |
| Boiling point @ 1 torr, | °C °F |
(a) | 165 329 |
| Pour point | °C °F |
ASTM D97-93 | -30 -22 |
| Viscosity, kinematic @ 20°C/68°F, cSt | ASTM D445-94 | 76 | |
| Viscosity, kinematic @ 40°C/104°F, cSt | ASTM D445-94 | 22 | |
| Flash point, Cleveland Open Cup | °C °F |
ASTM D93-94 | 196 385 |
| Fire point, Cleveland Open Cup | °C °F |
ASTM D92-90 | >200 >392 |
| Auto ignition temperature | °C °F |
ASTM D215 | >320 >608 |
In order for the vapour booster pump to work effectively and give long service intervals it needs a suitable oil, with a narrow boiling range and long life. It was developed specifically with vapour booster pumps in mind and continues to be the fluid recommended by the pump manufacturers.
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