Krytox™ XHT-SX PTFE Thickened Grease for High-Temperature Applications

Krytox™ XHT-SX grease has an Oil Viscosity of 738 cSt at 40°C and the estimated useful temperature range is 250 to 320°C.

Krytox XHT-SX Grease | High Temp Standard Grease

Low oil evaporation for extending life of parts

Krytox™ XHT-SX grease is a special high temperature greases with low oil evaporation that provide long bearing life and are compatible with most elastomers and plastics. These greases provide excellent lubrication over a broad temperature range, but are designed to work best at temperatures over 200 °C (400 °F). Krytox XHT-SX grease is nonflammable, oxygen compatible, chemically inert, and provide extended lubrication intervals and longer equipment life.

Krytox XHT-SX grease is an extension of the Krytox GPL 240 series and Krytox GPL 20X series, but are designed to give higher performance in the 204–302 °C (400–575 °F) range. Krytox™ XHT-S series greases should be used below 320 °C (608 °F), where the polytetrafluoroethylene (PTFE) thickener could begin to melt. The base oil is an extremely viscous oil that provides good viscosity and lower evaporation at high temperatures. Krytox XHT-SX grease contains no additives, so they are used when a potential for interaction between process chemicals and grease additives exists. Krytox grease is made to a standard NLGI grade 2. PTFE is the standard thickener. For additional Krytox lubrication series info, please see Krytox GPL 22X series or Krytox GPL 20X series.

Krytox XHT-SX compatibility with metals

Due to their low surface tensions, Krytox oils easily wet metallic surfaces; and, because of their inertness, Krytox oils have little or no adverse effect on metals. Testing of metals at 340 °C (644 °F) in the absence of air has shown little evidence of corrosion. In the presence of air, corrosion was slightly higher. The presence of molybdenum in the metals improved corrosion resistance. Because of its thermal stability and non-oxidizing characteristics, Krytox is a natural high-temperature lubricant. Krytox XHT greases are available with useful temperature ranges up to 360 °C (680 °F) for continuous use, with spikes to 400 °C (752 °F), when used in proper metallurgy with periodic re-lubrication.

Miller-Stephenson: Lubrication Experts, Superior Chemistry, Fast Delivery – a potent combination

We understand the challenges engineers and scientists face with trying to select the best lubricant for current or new applications.  With over 60 years of real-world experience, our highly trained team of technical experts and field engineers can assist you with identifying and selecting the optimal lubricant that best fits your operational parameter. Our large inventory of high-performance PFPE-base Krytox™ lubricants from Chemours, ensures we have the right lubricant for your needs, regardless of temperature, environment, safety, or performance of your system demands. For further information please review the articles below or contact a Miller-Stephenson representative.

Krytox™ is a trademark of The Chemours Company FC, LLC.
 

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