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High Vacuum Grease
Vacuum grease is a lubricant with low volatility and is used for applications in low-pressure environments. Lubricants with higher volatility would evaporate, causing two problems:
They would not be present to provide lubrication.
They would make lowering the pressure below their vapor pressure difficult.
Vacuum grease is also used as a system. This is usually limited to soft vacuums, as ultra-high vacuum or high temperatures may give problems with the grease outgassing. Grease is most used with glass vacuum systems. All metal systems usually use knife-edge seals in soft metals instead. Where O ring seals are used, these should not be greased (in static seals at least) as it can cause the O rings to become permanently distorted when compressed.
Electronics manufacturing processes, vacuum grease is often used to prevent corrosion.
Designed for sealing and lubricating vacuum and pressure systems. Low vapor pressure, stiff, non-melting silicone lubricant maintains its consistency from -40° to +204°C (-40° to +400°F). Resists oxidation and chemicals; noncarbonaceous
Designed for sealing and lubricating vacuum and pressure systems. It is a stiff, non-melting silicone lubricating material that maintains its consistency from -40 to 204°C (-40 to 400°F). It is used in applications similar to those for Dow Corning® Stopcock Grease and is the recommended replacement for that product. Previously known as Dow Corning® 976 or 976V High Vacuum Grease. Any specifications calling for Dow Corning® 976, Dow Corning 976V or Dow Corning®Stopcock Grease can be satisfied with Dow Corning® High Vacuum Grease. FEATURES: – Good lubricating and sealing ability. – Low volatility to hold deep vacuum. – Non-melting. – Good thermal stability. – Excellent resistance to water, chemicals, high and low temperatures. APPLICATIONS: – Recommended for vacuum reaching between 1×10-5 and 1×10-6 torr. It is recommended that the grease is preconditioned under vacuum and temperature until these limits are reached to avoid sample contamination. – Seals and lubricates chemical processing equipment. – Lubricates laboratory equipment. – Lubricating plug valves, control valves, flow meter bearings, ceramic plug cocks, fire extinguisher valves, water treating equipment, synthetic rubber gaskets and seals in high-temperature applications. – Sealing vacuum and pressure systems. – Lubricate synthetic rubber gaskets and seals in high-temperature applications. – Lubricating O-rings in binoculars and telescopes. – Prevents fogging of delicate lenses. – NOTE: Not recommended for use where it will come in contact with liquid oxygen. CHEMICAL RESISTANCE: – Insoluble in water, methanol, ethanol, acetone, glycol, and glycerine. – Unaffected by most vegetable and minerals oils, many organic compounds, and most common gases. – Resistant to most aqueous solutions of inorganic salts and to dilute acids and alkalies. LISTED APPROVALS: – FDA 21 CFR 175.300 – USDA: H-2, Approved for incidental food contact in federally inspected meat and poultry plants – NSF 61