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E-mail: sj@sealing-china.com
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Description
Pure PTFE gasket made by cutting PTFE stick,pipe and sheet into flat shape PTFE gasket,v shape PTFE gasket or valve annulus PTFE gasket，it has 100% PTFE structure. It can bear the most bitter chemical medium, and PTFE gasket has good anti-creeping performance.PTFE gasket is a replacement of asbestos,and it is anti-creeping,anti-cold-flow and anti-low-temperature.PTFE gasket has no pollution and is easy to install and replace. Under small pre-tress force, it can bear great internal pressure even in a environment of changing pressure. It is the best suit the condition with rough and fragile flange and alternately-changing temperature.
With good mechanical strength ,PTFE can be made into different shapes of PTFE products or other metal products ,such as PTFE envelope gasket, spiral wound gasket, metal corrugated gasket or metal serrated gasket.
Application
Applied to the various industry in chemical, petrochemical, refining, alkali, acid, phosphate fertilizer, pharmaceutical, pesticide, chemical fiber, dye, coking, coal gas, organic compound, non-ferrous smelting, steel, atomic energy and high purity products , viscous material transportation and operation, highly strict health food production and so on.
Specification：
|
Item |
Unit |
Value |
|
Density |
㎏/cm3 |
2.10-2.30 |
|
Crystallinity |
% |
Resin 93～97 Non-Quenching products 63～85 |
|
Temperature |
℃ |
-180~260 |
|
Melting point |
℃ |
327 |
|
Distortion temperature |
℃ |
55 |
|
Vicat softening point |
℃ |
110 |
|
Thermal-decomposition temperature |
℃ |
＞415 |
|
Linear expansion coefficient |
1/℃ |
20～60℃ 10.3×10-5 |
|
Thermal conductivity |
W/m.K |
0.256 |
|
Poisson's ratio（25℃） |
- |
0.40 |
|
% |
1.37 |
|
|
- |
＜0.01 |
|
|
Contact angle to water |
- |
114°-115° |
|
Surface tension |
N/Cm |
18.5×10-5 |
|
Permittivity |
（10H2） |
≤1.8-2.2 |
|
Volume resistivity |
Ωm |
≥1×1015 |
|
Surface resistivity |
Ω |
＞1010 |
|
Arc resistance |
s |
≥300 |
|
Tensile strength |
MPa |
27.6 |
|
Elongation at break point |
% |
238 |
|
Compressive modulus of elasticity |
MPa |
280 |
|
Compressive strength 5% |
MPa |
12.9 |
|
Impact strength（gap） |
KJ/m2 |
2.0 |
|
Bending strength |
MPa |
20.7 |
|
Flexural Modulus of Elasticity |
MPa |
700 |
|
Friction coefficient (Load 2MPa） |
（Time 30mm） |
0.11 |
|
Friction coefficient |
mg |
249 |
|
Wear scar width |
mm |
15.8 |
|
Outer Diameter Size |
mm |
≤ 2000 |
Feature：
1.Good insulation performance and outstanding ageing resistance
2.Chemical resistant, acid and alkali resistant
3.Non-viscous and easy to install and replace
4.High mechanical strength, good turning performance and easy to process into various sealing products.
5.Clean products and can be used in food, medicine and other sealing parts which is not polluted