BARRIERTA & Co. - PFPE Lubricants for extreme conditions
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your global specialist Detailed information BARRIERTA® & Co. PFPE Lubricants for extreme conditions. Tribological solutions for bearings and guideways

PFPE - High-performance lubricants for extreme conditions 4 Maximum operating temperatures 6 Huge differences in temperature 7 Strong influence by media 8 Extreme physical stresses 10 High speeds/centrifugal forces 10 Recommendations for the use of PFPE greases 12 Initial lubrication and cleaning 12 Miscibility with other greases 13 Questionnaire Rolling Bearings 25

Klüber Innovation It was in the late sixties that Klüber Lubrication developed the first hightemperature lubricants based on perfluorinated polyether oils (PFPE) – the BARRIERTA® brand. BARRIERTA® lubricants are far superior to conventional lubricants in terms of longevity and thermal resistance. Consequently, they have enabled engineers to come up with completely new designs. As the world’s only specialty lubricant manufacturer to obtain its exclusive PFPE oils from an associated manufacturer, Klüber Lubrication has been a pioneer in the marketing of this new type of lubricant. Today,...

PFPE – High-performance lubricants for extreme conditions Today, smaller machines are expected to deliver higher output with reduced maintenance and at lower cost – a real challenge for all branches of the machine building sector. As a consequence, bearings and guideways are forced to operate under higher temperatures, at higher speeds and for a longer time while being exposed to varying environmental influences. The tribological stresses acting on friction points are becoming ever more extreme. If long lifetimes are to be attained while combating high or strongly fluctuating temperatures,...

Benefits offered by PFPE greases from Klüber at a glance Long service life ❑ at high temperatures – up to 300 °C and above ❑ at strongly fluctuating temperatures ❑ under the influence of aggressive chemicals Improved component performance ❑ due to excellent compatibility with seals ❑ due to excellent compatibility with plastic materials ❑ due to low evaporation losses Safer applications ❑ due to non-toxic substances ❑ due to non-flam

Extreme temperatures Maximum operating temperatures At temperatures rising above 200 °C, long-term lubrication with conventional greases is no longer effective. Lubricant decomposition and evaporation lead to ever shorter relubrication cycles and give rise to premature bearing failure. In many cases, the use of PFPE greases begins to make sense at permanent temperatures of approx. 160 °C. The longer service life offered by these greases more than makes up for the higher product costs. Conventional greases, like those based on mineral oil, are normally not recommended for operating...

Huge differences in temperature Bearings and guideways that are normally exposed to high temperatures may have to function at normal or even very low temperatures as well. “Cold starts” may be necessary even if the operating temperature is 180 °C or Service temperature ranges and measured low temperature starting torques* more. Klüber Lubrication meets this additional challenge by using highly refined production techniques for its products. The PFPE greases made in this way have an extremely wide service temperature range. Heated calenders and broad-drawing rollers are found in many...

Strong influence by media Aggressive chemicals Sensitive materials If direct contact between lubricant and aggressive chemicals or fumes cannot be reliably prevented for design reasons, the lubricant must be extremely resistant. And when it comes to chemical resistance, there is simply no alternative to Klüber’s PFPE greases. EPDM or Viton seals? This is important to know when choosing a lubricant. However, with PFPE greases from Klüber there won't be a problem. If you are using perfluorinated FFKM elastomers, however, there might be crossreactions between the seal material and the...

Food-grade lubricants Lubricants that are to be used in the food-processing industry must meet special requirements. If incidental contact with the food product cannot be avoided for technical reasons, the lubricants used must be physiologically safe, neutral in taste and odor and should, ideally, be internationally approved. BARRIERTA® greases fulfill all these requirements. BARRIERTA® L 55 greases are used by leading food-product manufacturers. BARRIERTA® L 55 greases These white special greases have proven successful in bearings and guideways that are subject to thermal stress such as in...

Extreme physical stresses High speeds/centrifugal forces Rising bearing speeds and torques at high temperatures are typical of the challenging operating conditions under which lubricants in heavy-duty electric motors, and many other types of equipment, must perform today. And in bearings with a rotating outer ring, the higher centrifugal forces bring about even tougher requirements. Component test rigs made by Klüber provide predictions of grease life in rolling bearings at high speeds and under defined axial and radial loads. Klüberalfa® BF 83-102 This high-speed grease was specifically...

Vacuum resistance In certain applications, such as in outer space, clean room production sites, or CVD processes, a lubricating grease must do double duty by meeting the general application requirements and by performing reliably in high to ultrahigh vacuum. If evaporation losses are too high, an elevated risk of starved lubrication and quality defects caused by condensate on manufactured parts will be the consequence. Highly vacuum-resistant lubricants made by Klüber also offer support in sensitive manufacturing processes. For more information on lubricants for clean-room production,...

Recommendations for the use of PFPE greases Initial lubrication and cleaning PFPE lubricants adhere best to completely degreased, metallically bright surfaces. We therefore recommend thorough cleaning of the friction points prior to initial lubrication so as to remove any organic residues or anticorrosive oil. In contrast, PFPE-compatible anticorrosive products such as Klüberalfa® XZ 3-2 do not need to be removed. We recommend cleaning in two steps. PFPE greases cannot absorb conventional anticorrosive oils (shown yellow). This impairs adhesion in the bearing. First step: Clean surfaces in...