Krytox™ XHT-BDZ Grease is a special extreme high temperature grease with low oil evaporation, thickened with a non-melting additive allowing use at temperatures above the melting point of most common greases.
Krytox™ XHT-BD has a viscosity of 1023 cSt @40°C, highest performance in the Krytox™ XHT-BD series.
Krytox™ XHT-BD series are special extreme high temperature greases with low oil evaporation. Krytox™ XHT-BDZ grease uses a special non-melting high temperature thickener. Krytox™ XHT-BD series greases are nonflammable and chemically inert. Krytox™ allows extended lubrication intervals and longer equipment life. Krytox™ XHT-BDZ greases are designed for use where the temperatures are in the 288°C (500°F) range and higher, where there is a danger of melting the standard PTFE thickener. The base oil is the most viscous oil in the Krytox™ XHT-BD series providing good viscosity and lower evaporation at high temperatures.
Krytox™ XHT-BD greases are for use in low speed bearings or in pillow housings and will shear at high speeds, causing loss of oil in sealed bearings.
The oil in the grease can begin to slowly evaporate at temperatures above 360 °C (680°F), and this will occur at an increasing rate as temperatures increase. It can withstand intermittent spikes up to and above 400°C (752°F). Re-lubrication could be required at these temperatures to achieve optimum life.
Krytox™ XHT-BDZ Grease has excellent lubrication over a broad temperature range.
Due to their low surface tensions, Krytox™ base oils easily wet metallic surfaces. Because of their inertness, Krytox™ base 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. The presence of molybdenum in the metals improves corrosion resistance further.
Estimated Useful Range °C: –5 to 360 (with spikes to >400)
Oil Pour Point °C: -15
Base Oil Viscosity, cSt @40°C: 1023
Oil Separation in 30 hr at 99°C: 5
Oil Volatility in 22 hr, % @260°C: 1.1
Appearance: White, creamy consistency
Specific Gravity at 0°C: 2.00
NLGI Grade: 1.5
Primary Chemistry: PFPE
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. The PTFE thickener forms a barrier that holds the base oil at friction contact points for long-term lubrication, without requiring complicated oil recirculation systems. Anit-corrosion, High Temperature and High Pressure additives are also provided for specialized applications.