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Description
PTFE is a popular O-Ring material which is White in color. The PTFE O-Rings are popular for use in applications which require a chemically resistant and non-compressible material.
Specification
Our PTFE O-Ring
1.AS568 US standard and other sizes
2.OEM Services are available
There are several different standards to choose from when it comes to O-ring dimensions. The most popular in the United States is the AS568 standard for O-ring sizes and tolerances. Maintained by the Society of Automotive Engineers, this standard allows the user to choose from five different cross-sections with inside diameters ranging from 1/32" to 26".
All Seals also offers a wide array of metric sizes, in both standard and non-standard dimensions. All Seals can provide custom O-rings, specially made to your demanding requirements.
|
ID |
≤1000mm |
|
CS |
0.3-15mm |
If you have any need, please send us massage.
We will try to reply you ASAP.
Technical datas of Filled PTFE O Ring
|
No. |
Filled compound and Content by wt |
Tensile strength MPa(min) |
Ultimate strength %(min) |
Compressive strength MPa(min) |
|
1 |
20% glass fiber |
10 |
120 |
16 |
|
2 |
25% glass fiber |
10 |
100 |
16 |
|
3 |
20% glass fiber 5% graphite |
10 |
120 |
16 |
|
4 |
60% Bronze |
10 |
80 |
20 |
|
5 |
15% carbon fiber |
11 |
130 |
16 |
|
6 |
24% Bronze 12% glass fiber 6% graphite |
9 |
100 |
16 |
|
7 |
15% glass fiber 10% Polyimide 5% graphite |
10 |
120 |
16.7 |
|
Item |
ASTM |
Data |
Unit |
|
Mechanical Properties |
|||
|
Density |
D792 |
2.1~ 2.2 |
g/m3 |
|
Tensile strength |
D638 |
≥25 about 25 ~ 45 |
MPa |
|
Elongation at break |
D638 |
≥150 about 200~ 350 |
% |
|
Compression strength |
D695 |
24 |
MPa |
|
ShoreD Hardness |
D636 |
50-60 |
- |
|
Friction coefficient |
on steel |
0.01 |
- |
|
Thermal Properties |
|||
|
Working Temp |
|
-180 ~ +260 |
°C |
|
Melting point |
|
330 |
°C |
|
Produce Max. Temp |
|
390 |
°C |
|
Fire Resistance |
UL94 |
V-0 |
|
|
Brittle point temperature |
|
-268 |
°C |
|
Electrical properties |
|||
|
Dielectric strength |
D149 |
>1400 |
kV/mm |
|
Volume resistivity |
D257 |
>1018 |
Ω·cm |
|
Surface Resistivity |
D257 |
>1016 |
Ω |
|
Dielectric constant |
D150 |
2.1 |
|
|
Conventional properties |
|||
|
Chemical solvent resistance |
Excellent |
|
|
|
Water absorption (25℃ ) |
D570 |
0.01 |
24h/% |
|
limit oxygen index |
D2963 |
>95 |
|
Feature
PTFE is the chemically inert of the O-ring materials.
Resistant to most chemicals including acids, bases, oils, steam and other chemicals.
Very tough and abrasive resistant.
Has minimum friction coefficient of all know pure material
Non-viscous, no aging
Now molds can be made according to customers requirements.