Apiezon L vacuum grease (EMS)

Apiezon L ultra high vacuum grease is a well-proven and recommended high-vacuum grease for electron beam instruments. It is a petroleum hydrocarbon grease, containing no additives. Very low vapour pressure, high vacuum grade. Widely used in electron microscopy where moderately high column temperatures and high vacuum requirements demand a vacuum grease with extraordinary characteristics and also used in the stationary phase of gas liquid chromatography, and may be used on all ground joints in a vacuum system (not for stopcocks).

Features:

• Very high vacuum range
• Ambient temperatures
• Cryogenic uses
• Radiation resistant
• Added cushioning
• Excellent lubricants
• Silicone & halogen free
• Easily removed

Comparison Data for Apiezon Greases

Properties:

• Dropping point - ASTM.D 566: 42 to 52?C
• Typical working temperature range: 10 to 30?C
• Vapour pressure @ 20?C: 7x10^-11Torr
• Relative density @ 20?C: 0.896
• Resistant to radiation: Yes
• Outgassing characteristics - ASTM .E 595: <1% TML, <0.1% CVCM
• Lubricity 4 Ball Test - ASTM.D 2596: 150kg
• Viscosity of molten grease: 766cSt @ 50?C, 62.3cSt @ 100?C
• Coefficient of expansion per ?C over 20?C - 30?C: 0.00076
• Thermal conductivity @ 20?C: 0.194W/m?C
• Volume resistivity: 1.2x10¹⁶? cm
• Permittivity: 2.3
• Loss tangent: <0.0001
• Surface breakdown at flash over: 24kV
• Electrical strength: 730V/mil
• Solubility is as follows: in ethanol at 20?C-0.003%; 60?C-0.005%; 100C-0.011%; 150?C-0.011%.

Apiezon L Technical Data