High Vacuum
Grease
HVG Compound is
a stiff non-melting grease like Silicone material. It maintains its
consistency over a wide temperature range of –40
°C
to 250 °C. Its low
volatility, very low vapor pressure of the base, chemical resistance,
relatively constant consistency over a wide
temperature range sealing ability, make it an
ideal sealant for high vacuum and high pressure systems and sealant-cum-lubricant for chemical
processing equipment.
Applications
:
 As
a sealant and lubricant for
glass-ints and stop-cocks in high vacuum and high temperature systems as
well as in ordinary systems.
In
pressure lubricated plug valves, control valves and ceramic plug cocks.
In
valves of water – softener.
In
fire extinguishers to keep the valves dependably operable for long period despite severe temperature conditions and corrosive atmosphere.
As
a sealant on floating telephone batteries.
Its
high tack may be taken advantage of, in holding rubber and other parts in position during
assembly of certain parts.
As
a release agent for epoxy, polystyrene, polyvinyl chloride, polyester resins and other plastics. Normally it is used only
when common release agents including other silicone release
agent fail.
Typical Properties :
Colour…
Translucent, Consistency - Penetrometer,
unworked – 180 -
210, Bleed, Percent
maximum 24 hours at 200oC …..0.5: Evaporation, percent
maximum 24 Hrs. at 200oC…..2.0 Apparent Density, gms /c.c
….1.0 solidification point, below…-40oC, melting point…..None.
Chemical Resistance :
HVG has been found to be resistant to dilute aqueous acids, alkalis
and other inorganic
Salt solutions. It
is unaffected by most vegetable and mineral oils. Many organic compounds
and common gases.
Solubility:
HVG
Compound is not soluble in water, methyl
alcohol, ethyl
alcohol, acetone glycol and glycerin. However, it can be dispersed in kerosene, benzene, toluene
ethyl ether, carbon
tetrachloride, petroleum ether, methylene chloride or perchloroethylene.
Packing :
1 Kg, 5 Kg, & 30 Kgs Jar.
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