Klüberalfa GR ZNF Vacuum Grease –
Temp Range (-60 to +200 (°C))
Long-term grease for extreme requirements.
Description
Klüberalfa GR ZNF is a white, odourless long-term grease based on a perfluorinated polyether (PFPE) oil and a polytetrafluoroethylene (PTFE) thickener. The extremely high viscosity index allows consistent sliding friction properties across a wide service temperature range. Additionally, the product shows an exceptionally good evaporation stability.
Klüberalfa GR ZNF shows a neutral behavior towards most plastics and elastomers and can therefore be used for a variety of component materials.
Benefits
- Wide service temperature range
- Very high evaporation stability
- For applications under vacuum conditions
- Good adhesion to many materials
- Chemically inert to avoid undesirable reactions
Application
Klüberalfa GR ZNF is preferred for applications under vacuum conditions or strong temperature fluctuations. Application examples are in cleanroom equipment, semiconductor or automation technology as well as in the aerospace industry. Klüberalfa GR ZNF shows good sliding friction behavior, performing equally well in linear guides, rolling and plain bearings and seals.
Behavior towards elastomers and plastics:
Lubricants based on fluorinated polyether oils and polytetrafluoroethylene are generally regarded as neutral towards most elastomers and plastics (exception: perfluorinated rubber). Nevertheless we recommend testing compatibility with the material to be used, especially prior to series application.
Application Notes
For optimum lubrication results, we recommend cleaning the friction points with white spirit 180/210 followed by Klüberalfa XZ 3-1. Then blow the surfaces with clean, dry compressed air or hot air to remove solvent residues. For initial lubrication, the friction points must be clean and bright, i.e. free from oil, grease, perspiration and contamination. Klüberalfa GR ZNF is applied directly or by means of brush, spatula or lubricant dispenser. The technical sales departments at Klüber Lubrication may be contacted at any time for advice to ensure optimum service life results.
Specifications
| Product data | Klüberalfa GR ZNF |
| Article number | 090192 |
| Chemical composition, type of oil | PFPE |
| Chemical composition, solid lubricant | PTFE |
| Lower service temperature | -60°C / -76°F |
| Upper service temperature | 200°C / 392°F |
| Color space | white |
| Texture | homogeneous |
| Vapor Pressure (Torr) | 20°C (Torr): 7.5x10-4 |
| NLGI grade, DIN 51818 | 3 |
| Worked penetration, DIN ISO 2137, 25°C, lower limit value | 220 x 0.1 mm |
| Worked penetration, DIN ISO 2137, 25°C, upper limit value | 250 x 0.1 mm |
| Kinematic viscosity of the base oil, DIN 51562 pt. 01/ASTM D-445/ASTM D 7042, 40°C | approx. 140 mm2/s |
| Kinematic viscosity, DIN 51562 pt. 01/ASTM D-445/ASTM D 7042, 100°C | approx. 40 mm2/s |
| Oil separation, based on ASTM D 6184 [FTMS 791 C 321], after 30 h/200 °C | <= 9 % by weight |
| Evaporation loss, ASTM D 2595 22h/204°C | <= 2 % by weight |
| Minimum shelf life from the date of manufacture - in a dry, frost-free place and in the unopened original container, approx. | 60 months |
Shelf Life
It is strongly recommended using all fluids and greases at the time of receipt, however when storage is necessary, rotate older stock into use first and observe the recommended parameters listed below.
Klüber Grease
Shelf Life of Klüber Grease is a minimum of 5 years; in this case although there won't be problems in terms of chemical stability there can be oil separation over time, which is normal.