Krytox XHT-S and XHT-SX greases are 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-S series greases are nonflammable, oxygencompatible, chemically inert, and provide extended lubrication intervals and longer equipment life.
The Krytox XHT-S series greases are 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-S series greases contain 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.
Applications for these lubricants are generally of a critical nature, such as when temperatures reach extremes that conventional lubricants cannot handle. Krytox™ XHT-S and XHT-SX greases are expected to be durable in highly aggressive environments. Where failure of components is not an option, because of durability, warranty, safety, loss of productivity, or downtime, Krytox™ lubricants are the ideal choice in a wide range of industries and applications.
Compatibility with Metals
Because of their low surface tensions, Krytox lubricants easily wet metallic surfaces. Krytox lubricants are chemically inert and, therefore, have no adverse effect on metals when the temperature is below 288 °C (550 °F). Above 288 °C (550 °F), many alloy steels, stainless steels, and other metals, such as aluminum alloy, titanium alloy, nickel alloy, and cobalt alloy, can be used with Krytox lubricants.
The recommendation made here with and the information set forth with respect to the performance or use of our products are believed, but not warranted to be accurate. The products discussed are sold without warranty, as to fitness or performance, express or implied and upon condition that purchasers shall make their own test to determine suitability of such products for their particular purposes. Likewise, statements concerning the possible uses of our products are not intended as recommendations to use our products in the infringement of any patent.