Krytox™ XHT-S Grease is high temperature grease with low oil evaporation that provides long bearing life and is compatible with all elastomers and plastics.
Krytox™ XHT-S Grease has a viscosity of 500 cSt @40°C.
Krytox™ XHT-S greases are special high temperature greases with low oil evaporation that provide long bearing life and are compatible with most elastomers and plastics. Krytox™ XHT-S greases provide excellent lubrication over a broad temperature range, and are mainly designed to work best at temperatures over 200°C (400°F). The Krytox™ XHT-S series greases are an extension of the Krytox™ GPL 240 series and Krytox™ GPL 20X series, 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, with PTFE as the standard thickener.
Estimated Useful Range °C: –20 to 300
Base Oil Viscosity, cSt @40°C: 500
Oil Viscosity Index: 149
Oil Pour Point °C: -25
Oil Volatility in 22 hr, % @260°C: <1
Appearance: White, creamy consistency
Specific Gravity at 0°C: 1.99
NLGI Grade: 2
Food Contact Approval: None
Primary Chemistry: PFPE
Applications for Krytox™ XHT-S lubricants are generally of a critical nature, such as when temperatures reach extremes that conventional lubricants cannot handle. Krytox™ XHT-S grease is expected to be durable in highly aggressive environments.
Krytox™ XHT-S series greases are nonflammable, oxygen compatible,
chemically inert, and provide extended
lubrication intervals and longer equipment life.
• Paint plant conveyor bearings
• Corrugator and paper machine bearings
• Aluminum can manufacturing bearings
• Welding machines
• High temperature fans
• Textile equipment
• Tenter frames
• High temperature ovens
• Conveyor systems in glass and aluminum plants
• Textile calender roll bearings
• Brick kiln car bearings
• Valve lubrication
• Ventilation fan bearing grease
• Rod mills
Krytox™ greases are nontoxic lubricants that maintain their lubricity and viscosity properties to reduce maintenance costs associated with re-lubrication, component failure, and downtime in demanding applications. They are created by thickening synthetic perfluoropolyether-based oil (PFPE) with polytetrafluoroethylene (PTFE) powder.
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