| Varglas 240 Silicone Rubber Sleeving |
Description
Varglas 240 Silicone Rubber Sleeving is pro duced by coating braided Fiberglas® with a specially formulated, proprietary silicone rubber that exhibits exceptional high-temperature properties. In addition to its flexibility, toughness and abrasion resistance, Varglas 240 Silicone Rubber provides superior thermal protection and flame resistance with a higher dielectric capability at less weight than previously available. Its ability to meet a Class 240°C rating, combined with a brittleness temperature of -80°C, makes it an ideal choice for applications that require outstanding physical and electrical insulation properties throughout a wide operating temperature range.
Specifications
Varglas 240
Silicone Rubber Sleeving conforms to, and is listed on the qualified
Products List (QPL) for, MIL-l-3190/9, latest revision (Grade A); and
exceeds the requirements of UL 1441, Table 19.8; NEMA TF-1, Type 5; and
ASTM-D372.
Under the Component Program of Underwriters
Laboratories, Grade A Varglas 240 Silicone Rubber is recognized for 240°C,
600 volt service and complies with VW-1 flammability requirements under UL
File #E63450.
Applications
Varglas 240
Silicone Rubber Sleeving is suitable for industrial applications such as
motors, generators, transformers and engines where superior dielectric
protection at elevated temperatures of 240°C is critical. In addition to
automotive engines, Varglas 240 Silicone Rubber’s flame resistance and
wide-operating temperature range make it particularly well suited for
aircraft engines and other aerospace applications where it satisfies
electrical and thermal barrier requirements while providing the added
benefit of lighter weight.
Sizes
AWG #24 through
2” l.D. Other sizes subject to inquiry.
Standard Color
Red oxide and
black only.
Standard
Packaging
Coils, spools or
36” lengths at manufacturer’s option, unless otherwise specified. There is
no cutting charge for 36” lengths, but lengths other than 36” are subject
to cutting charges.
Sizes over 1” l.D. are generally supplied in
36” lengths.
FibergIas® is a registered trademark of Owens-Corning.
Typical Properties
Property
Procedure
Performance
Physical
Tensile
Strength, Coating
ASTM-D412
1600
psi
Ultimate
Elongation, Coating
ASTM-D412
800% @
20°C
Hardness,
Coating
ASTM-D2240
54
(Durometer, Shore A)
Flexibility
and Toughness, Coating
UL 1441
Passes
(Penetration test)
Chemical
Oil and
Solvent Resistance
MIL-l-3190/9
Passes
Water Vapor
Resistance
MIL-l-3190/9
Passes
Resistance
to Acids and Alkalies
Excellent
Resistance
to the Elements
Unaffected
by sunlight and weather.
Compatibility
UL 1446
Good.
Compatible with most potting compounds and varnishes.
Electrical
Dielectric
Strength after 48/23/50:
Grade A
NEMA TF -
1
8000v min.
avg., 6000v min. indiv.
Dielectric
Strength after 96/23/96:
Grade A
NEMA TF -
1
80% of
Original Value.
Hydrolytic
Stability after 336 hrs. @ 70°C over Constant Water Reflux
MIL-I-3190/9
Passes.
7660v min. avg. with no disintegration, reversion or
cracks.
(Spec. requires 5000v.)
Thermal
Thermal
Endurance
MIL-l-3190/9 & UL 1441
Class 240°C
(S)
Brittleness
Temperature
ASTM-D350
-
80°C
Flame
Resistance
UL 1441
Passes
(VW-1)
ASTM-D350,
Method A
Passes
NEMA
TF-1
Passes
MIL-l-3190/9, Method A
Passes
Pushback
MIL-l-3190/9
No cracks
or ruptures. 6000 volts mim. avg. breakdown
strength.
Note:
Information contained here is precise and reliable. However, being unique,
each end-use should be evaluated to satisfy its specific
requirements.