Apiezon Greases are unique products, designed for use in high vacuum work:
- Excellent lubricants
- High purity, low vapor pressure – non-contamination in analysis
- The working temperature range of each grease is dependent on the grade that is used
- Easily applied, easily cleaned off
- Silicone free. This benefits scientific users because the risk of sample contamination and consequently the risk of interference in analytical techniques such as infra-red or mass spctrometry, etc. is avoided
- Approved by NASA and NATO
| Typical Property |
L |
Main area of
application |
High Temp |
Melting Point:
ASTM.D 566 |
°C
°F |
42-52
108-126 |
| Working temp. range |
°C
°F |
10-30
50-86 |
Vapor Pressure
Torr @20°C |
7x10-11 |
| Relative Density 20°C |
0.896 |
| Radiation Resistance |
Yes |
Outgassing
Characteristics
ASTMS .E
595-90 |
TML
CVCM |
<1.0%
<0.1% |
Lubricity 4 Ball Test
ASTM .D 2763
(IP 239), Kg |
150 |
Viscosity of molten
grease, cP |
50°C
100°C |
766
62.3 |
Coefficient of
expansion per °C
over 20°C-30°C |
0.00076 |
Thermal conductivity,
w/m°C |
0.216
- |
Latent heat of fusion,
cal/g |
15.1 |
| Fusion Peak °C |
32 |
| Vol. resistivity, cm |
1.2x1016 |
| Permittivity |
2.3 |
| Loss tangent |
<0.0001 |
Surface breakdown
at flash over, kV |
24 |
| Electric strength, V |
730 |
*Too close to room temperature to measure
Apiezon Grease; Type L
Grease L is a petroleum hydrocarbon grease, containing no additives. Very low vapor pressure (@20°C of 8x10-11 torr), high vacuum grade. Type L is widely used in the stationary phase of gas liquid chromatography, and may be used on all ground joints in a vacuum system (not for stopcocks). Its solubility is as follows: in Ethanol at 20°C-0.003%; 60°C-0.005%; 100°C-0.011%; 150°C-0.011%. Grease L softens and melts at about 47°C and it is not recommended for joints where temperatures exceed more than 30°C in use. Grease T is recommended for these higher temperatures.