Fomblin® Family of PFPE High Vacuum Greases
Vacuum greases with outstanding performance under conditions of extreme
temperatures and chemical environments
Introduction:
Chemically inert lubricating greases are required when handling corrosive or
oxidizing substances. Fomblin fluorinated fluids are excellent base oils
for high temperature, high performance greases. Fomblin greases are derived
by thickening Fomblin fluids with tetrafluoroethylene telomers, silicates,
or other additives. Many of the greases have USDA H1 listing.
Some formulations incorporate soluble fluorinated additives, for example in
low noise applications, where rust prevention is required. However, more
commonly used additive packages including sodium nitrite and benzotriazole
are also possible. In Fomblin-hybrid greases, PFPEs may be added along with
standard base oils, such as mineral oil and synthetics, to make stable
greases containing conventional thickeners.
General description of properties:
Fomblin greases are homogeneous, white (except for YNX), thick and
particularly resistant to oxidation and to chemical agents. Further,they
are compatible with all types of material (glass, metals, elastomers,
plastics, ceramics) and their properties remain unaltered over wide
temperature ranges. Fomblin greases can also be used in the presence of
water, oils, vapor and, in general, with all organic substances and solvents
which are not highly fluorinated,without being removed, dissolved or
modified in any way.
Thermal stability:
All Fomblin greases have dropping points above 300°C and can be used at high
operating temperatures and in oxidizing conditions.
Chemical resistance:
Fomblin greases are inert and do not react even at high temperature with
fuels, acids, inorganic alkalis, halogens, fuming nitric acid or oxidizing
solutions.
Solubility/wash-out:
Fomblin greases are stable, do not emulsify with water, and are resistant to
all solvents except highly fluorinated solvents. Therefore, 1, 1, 3
trichlorotrifluoroethane or Galden SV can be used to clean surfaces
lubricated with Fomblin greases. The compatibility of Fomblin greases with
common solvents is given on our
product information page.
Oxygen compatibility:
Bundesanstalt fur Materialprufung, Berlin (BAM) has approved the use of
Fomblin fluids and greases in the presence of oxygen. Additionally, the
National Aeronautics and Space Administration (NASA) and the Naval Ship
Engineering Center of the US Navy have both approved the use of Fomblin
fluids and greases in liquid oxygen applications. Temperature and pressure
limits of oxygen with Fomblin greases are given on our product information page.
Compatibility with metals and structural materials:
Fomblin greases are compatible with all types of polymers, plastomers and
elastomers. During tests over one month at 20°C, none of these materials
(nitrile, butyl, polyfluorosiloxane, EPDM rubber) revealed swelling,
mechanical or physical alterations. Melamine, phenolic,polyoxymethylene,
and polyolefin resins are not altered after contact with Fomblin for one
month at 100°C. Fomblin greases can be used in continuous contact metal,
and oxygen, at temperatures up to 200°C.
Available Fomblin PFPE grease products:
Fomblin OT 20
A homogeneous white grease suitable for lubricating mechanical parts
subjected to low loads, used at low operating temperatures and high thermal
ranges (from -70°C to + 100°C). OT 20 is particularly suitable for
lubricating roller bearings of conveyor belts or suspended conveyor belts
used in cold storage rooms.
Fomblin UT 18
A homogeneous white grease suitable for lubricating mechanical parts
subjected to low loads, used in wide temperature intervals (from -30°C to +
150°C with peak temperature up to 200°C). UT 18 is particularly suitable
for lubricating friction mechanical parts subjected to medium loads, where
standard mineral and synthetic lubricants are not resistant to temperature
and air degradation. UT 18 is also used in lubricating special optical and
micromechanical equipment.
Fomblin Y VAC 3:
A homogeneous white grease particularly suitable for use as a lubricant of
mechanical parts operating at high vacuum and in contact with aggressive
chemicals or oxygen. Y VAC 3 is used in "lubricating for life" applications
; its lubricating properties make it suitable for parts requiring boundary
(extreme pressure) lubricating properties. It's welding point, in Shell
four ball EP tests is 620 Kg. Y VAC 3 can be used to lubricate mechanical
parts subjected to high thermo-mechanical stress. Y VAC 3 can be used for
long periods of time, and at very high operating temperatures (from -20°C to
+200°C) and is therefore widely used in the manufacturing, aeronautical and
electromechanical industries.
Fomblin YNX:
A homogeneous gray colored grease particularly stable with oxygen at high
pressures. It has good wear resistance properties and is particularly
indicated for use in static operating conditions, such as the lubrication of
valves, valve stems, and seals operating at high air pressure, liquid or
gaseous oxygen pressure and at temperatures ranging from -40°C to +200°C.
Fomblin ZLHT:
A homogeneous white grease having excellent lubricating properties. It can
be used in continuous operating conditions, at temperature intervals ranging
from -80°C to +200°C (the widest operating range for this family of greases)
. Its chemical and physical properties make it suitable for use in the
aerospace industry or in chemical plants where lubricating parts are
subjected to very wide thermal cycles.
Fomblin ZNF:
A homogeneous white grease having good surface adhesion and wear resistance
properties. ZNF grease has extremely low vapor pressure and is ideal under
vacuum in a wide temperature range.
Fomblin RT-15:
RT-15 high vacuum grease is a homogeneous white grease suitable for
lubricating mechanical parts requiring boundary (extreme pressure)
lubricating properties. Shell four ball EP test that Fomblin RT-15's
welding point is 800 Kg. Its operating range is from -20°C to +250°C. Its
properties make it suitable in "lubricating for life" applications.
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Monday February 06, 2012
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