Klüberalfa GR ZLHT Vacuum Grease –
Temp Range (-65 to +200 (°C))
Long-term lubricating grease for a wide temperature range
Long component life:
- over a wide service temperature range
- in contact with aggressive media
- where sensitive plastics are used
- under vacuum
Klüberalfa GR ZLHT is a white long-term grease based on perfluorinated polyether (PFPE) oil and a polytetrafluoroethylene (PTFE) thickener. The extremely high viscosity index, i.e. the very flat viscosity curve of the base oil, allows excellent sliding friction properties across a wide service temperature range.
Klüberalfa GR ZLHT is preferably used for the lubrication of plastics and seals where it shows exceptionally low friction values and a low tendency to stick-slip. This leads, for example, to a lower frictional heating of elastomers subject to dynamic loads and hence longer component life.
General behaviour towards elastomers and plastics:
Lubricants based on perfluorinated polyether oils and polytetrafluoroethylene are generally regarded as neutral towards most elastomers and plastics (possible exception: highly fluorinated rubber). Nevertheless, compatibility with the materials should be tested, especially prior to series application.
Application examples are:
- Electric motor bearings with a low starting and a high operating temperature
- Clean room equipment, e.g. slides, vacuum seals
- HVAC systems in the automotive industry
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 and perspiration. Klüberalfa GR ZLHT 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 ZLHT|
|Chemical composition, type of oil||PFPE|
|Chemical composition, solid lubricant||PTFE|
|Lower service temperature||-65°C / -85°F|
|Upper service temperature||200°C / 392°F|
|Density at 20°C||approx. 1.9 g/cm3|
|NLGI grade, DIN 51818||2|
|Worked penetration, DIN ISO 2137, 25°C, lower limit value||265 x 0.1 mm|
|Worked penetration, DIN ISO 2137, 25°C, upper limit value||295 x 0.1 mm|
|Kinematic viscosity of the base oil, DIN 51562 pt. 01/ASTM D-445/ASTM D 7042, 40°C||approx. 90 mm2/s|
|Oil separation, based on ASTM D 6184 [FTMS 791 C 321], after 30 h/200 °C||<= 12 % by weight|
|Evaporation loss, ASTM D 2595 22h/204°C||<= 6 % 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
|Download SDS: PDF for KLZLHTF|
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.
All dimensions listed below, unless otherwise stated, are in grams.