Klüberalfa GR ZNF Vacuum Grease –
Temp Range (-60 to +200 (°C))
Long-term grease for extreme requirements
- Wide service temperature range
- Very high evaporation stability
- For applications under vacuum conditions
- Good adhesion to many materials
- Chemically inert to avoid undesirable reactions
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 behaviour towards most plastics and elastomers and can therefore be used for a variety of component materials.
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 behaviour, performing equally well in linear guides, rolling and plain bearings and seals.
Behaviour 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.
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.
|Product data||Klüberalfa GR ZNF|
|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|
|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|
It is strongly recommend 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.
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.
Safety Data Sheets
About Klüber Lubrication München SE & Co. KG
Klüber Lubrication is one of the world's leading manufacturers of speciality lubricants, offering high-end tribological solutions to virtually all industries and markets worldwide. Most products are developed and made to specific customer requirements. During its more than 80 years of existence, Klüber Lubrication has provided high-quality lubricants, thorough consultation and extensive services, which has earned it an excellent reputation in the market. The company holds all common industrial certifications and operates a test bay hardly rivalled in the lubricants industry.
Klüber Lubrication, set up as a retail company for mineral oil products in Munich in 1929, is today part of Freudenberg Chemical Specialities SE & Co. KG, a Business Group of the Freudenberg Group, Weinheim. Klüber Lubrication has about 2.000 employees in more than 30 countries.