Content：
ArChine Vacumtech PFPE 256
PFPE Vacuum Pump Oil
Description:
ArChine Vacumtech PFPE 256 is perfluorinated polyether inert fluids for use as lubricants in vacuum pumps. It is a mixture of fluorinated polymers obtained by a photochemical process that begins with hexafluoropropylene. Since the PFPE chemical chain contains only carbon, fluorine and oxygen atoms, these fluids have exceptional properties such as:
- Low vapor pressure
- Chemical inertness
- High thermal stability
- Good lubricant properties
- No flash or fire point
- Non-toxicity
- Excellent compatibility with metals, plastics, elastomers
- Good aqueous and non-aqueous solvent resistance
- High dielectric properties
- Low surface tension
- Good radiation stability
- Environmentally acceptable
Typical Properties:
| Average molecular weight |
|
3300 |
| Specific gravity @ 20℃ |
g/cm3 |
1.90 |
| Kinematic viscosity @ 20℃ |
cSt |
276 |
| Viscosity index @ 20℃ |
|
113 |
Vapor pressure
@25℃
@100℃ |
torr
torr |
6×10-8
6×10-5 |
| Pour point |
℃（℉） |
-35（-31） |
| Heat of vaporization @ 200℃ |
cal/g |
7 |
| Surface tension |
dyne/cm |
22 |
| Evaporation loss(22hrs, 149℃) |
%wt |
0.6 |
| Ultimate total pressure |
torr |
1.2×10-3 |
| Specific oil consumption |
cm3/hr |
0.7 |
Applications:
Rotary pumps – sealing & lubricant fluid
Roots pumps – lubrication
