Insulation
Code |
Insulation
Type |
Appearance
|
Insulation
Temperature Range* |
Abrasion
Resistance |
Flexibility |
Water
Submersion |
| Overall |
Conductors |
|
PP
(Extension Grade-EXPP)
|
Polyvinyl
Chloride (PVC)
|
Polyvinyl
Chloride (PVC)
|
 |
-40
to 105°C
(-40 to
221°F)
|
Good
|
Excellent
|
Good
|
|
FF
(Extension Grade-EXFF)
|
FEP
Teflon or Neoflon
|
FEP
Teflon or Neoflon
|
 |
-200
to 200°C
(-328 to
392°F)
|
Excellent
|
Good
|
Excellent
|
|
TT
(Extension Grade-EXTT)
|
PFA
Teflon or Neoflon
|
PFA
Teflon or Neoflon
|
 |
-267
to 260°C
(-450 to
500°F)
|
Excellent
|
Good
|
Excellent
|
|
KK
|
Kapton
|
Kapton
|
 |
-267
to 316°C
(-450 to
600°F)
|
Excellent
|
Good
|
Good
|
|
TG
|
Glass
Braid
|
PFA
Teflon or Neoflon
|
 |
-73
to 260°C
(-100 to
500°F)
|
Good
|
Good
|
Excellent
|
|
GG
(Extension Grade-EXGG)
|
Glass
Braid
|
Glass
Braid
|
 |
-73
to 482°C
(-100 to
900°F)
|
Poor
|
Good
|
Poor
|
|
HH
|
High
Temp
Glass Braid
|
High
Temp
Glass Braid
|
 |
-73
to 704°C
(-100 to
1300°F)
|
Poor
|
Good
|
Poor
|
|
XR
|
Refrasil
Braid
|
Refrasil
Braid
|
 |
73
to 871°C
(-100 to
1600°F)
|
Poor
|
Good
|
Poor
|
|
XC
|
Nextel
Braid
|
Nextel
Braid
|
 |
-17
to 1204°C
(0 to
2200°F)
|
Fair
|
Good
|
Poor
|
|
Insulation
Code
|
Resistance
To:
|
Comments
|
|
Solvent
|
Acid
|
Base
|
Flame
|
Humidity
|
|
PP
(Extension
Grade-
EXPP)
|
Fair
|
Good
|
Good
|
Good
|
Good
|
Colour
Coded PVC Extruded Over Each Bare Wire. PVC Applied Over Insulated
Primaries. Affected by Ketones, Esters
|
|
FF
(Extension
Grade-
EXFF)
|
Excellent
|
Excellent
|
Excellent
|
Excellent
|
Excellent
|
Colour
Coded FEP Extruded Over Each Bare Wire. FEP Jacket Extruded Over
Insulated Primaries, Superior Abrasion and Moisture Resistance.
Same Basic Characteristics as PFA but Lower Temperature Rating
|
|
TT
(Extension
Grade-
EXTT)
|
Excellent
|
Excellent
|
Excellent
|
Excellent
|
Excellent
|
Colour
Coded FEP Extruded Over Each Bare Wire. PFA Jacket Extruded Over
Insulated Primaries, Superior Abrasion and Moisture Resistance.
Same Basic Characteristics as FEP but Higher Temperature Rating
|
|
KK
|
Good
|
Good
|
Good
|
Good
|
Excellent
|
Fused
Kapton Tape Approx. 0.15 mm Applied to Conductors. A 0.10 mm Jacket
is Then Applied to Both. Excellent Moisture and Abrasion Resistance,
High Dielectric Strength (7 kV/mil) Retains Much Physical Integrity
After Gamma Radiation. FEP is Used as Adhesive Binding Agent [Melts
at Approx. 260°C (500°F)]
|
|
TG
|
Excellent
|
Excellent
|
Excellent
|
Excellent
|
Excellent
|
PFA
Extruded Over Each Bare Wire 0.12 mm Silicon Impregnated
Glass is Overbraided Over Both. May Be Used for Single Measurement
to 343°C (650°F).
|
|
GG
(Extension
Grade-
EXGG)
|
Excellent
|
Excellent
|
Excellent
|
Excellent
|
Fair
|
0.12
mm Glass Yarn Braided Over Each Conductor, Impregnated with Silicon
Varnish, Then Covered Together with 0.12 mm Glass Braid. Varnish
Improves Moisture and Abrasion Resistance, but is Destroyed Above
204°C (400°F).
|
|
HH
|
Excellent
|
Excellent
|
Excellent
|
Excellent
|
Fair
|
High
Temp. Glass Braid Over Each Conductor, and Binder Impregnated.
Overall High Temp Glass Braid Applied and Bindered. Binder Improves
Moisture and Abrasion Resistance But is Destroyed
Above 204°C (400°F).
|
|
XR
|
Excellent
|
Good
to
316°C
(600°F)
|
Good
to
316°C
(600°F)
|
Excellent
|
Poor
|
Braid
of Vitreous Silica Fibre Applied to Each Bare Wire. Then Over
Both. Suitable to 982°C (1800°F) if Not Subjected to
Flexure or Abrasion.
|
|
XC
|
Excellent
|
Good
|
Good
|
Excellent
|
Fair
|
High
Temp. Alumina-Boria-Silica Ceramic Fibre Braided Over Each Conductor
Then Over Both. Not Recommended for Platinum Thermocouples or
Exposure to Molten Tin and Copper, Hydrofluoric or Phosphoric
Acids, or Strong Alkalies.
|
