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PTFE gasket

Pure ptfe gasket

Pure PTFE gaskets for PTFE gasket abroad also called PTFE gaskets or Teflon, Teflon, Teflon gasket by PTFE rods, tubes, plate by the mechanical cutting or cutting into the flat gasket, v-shaped gaskets, piston rings, valve washer and so on can also be made by mould pressing forming by high temperature vulcanization molded PTFE gasket.Should be four fluorine has excellent corrosion resistance, aging resistance, good insulation, clean features so they are widely used in chemical, petroleum, pharmaceutical, food and so on many fields, known as "plastics king".Ptfe with strong corrosion resistance, only molten alkali and high temperature and high pressure under the rare element such as the element fluorine to work for it.Four fluorine water, oxygen and ultraviolet effect good weatherability, 3 years in outdoor exposure, the tensile strength was almost unchanged, only the elongation decreased.As a result of four fluorine in easy to produce cold flow and pressure and high temperature creep phenomenon made him very suitable for low temperature at low pressure or temperature, strong corrosion or there is no pollution in the sealing parts.Four fluorine in - between 100 ℃ ~ 100 ℃ can have good mechanical strength can be made into different shapes of four fluorine products, can also be made four fluorine and other combinations of materials, such as cladding gasket, winding gasket, or as stick a layer of metal gasket, such as metal tooth composite pad and metal wave tooth composite gasket

Note:Ptfe gasket would be brittle at temperature below 185 ℃, higher than 200 ℃ when creep cracking, so should not be used for high temperature.Ptfe gasket with low thermal conductivity and coefficient of linear expansion is larger cold flow happens under the load, should be this recommendation in the medium temperature low pressure of concave and convex surface, whole plane and tank flange parts used, if with water effect is better.Add different fillers such as glass fiber, graphite, molybdenum disulfide, bronze powder can improve the performance of ptfe gaskets, such as the reference of modified ptfe gasket

The company has GB2506-89, GB/T17727, HG/T20627, HG/T20606 standards such as whole series of pure ptfe gasket mold are welcome to inquire
Performance characteristics:

1. Resistant to acid alkali, resistance to almost all chemical medium, molten alkali metals and element fluorine, etc.
2. Good insulation performance outstanding resistance to ageing climate.
3. Low friction coefficient,, is not easy to bond, disassembly easy installation
4. The product is clean, can be used in food, medicine and other sealing parts which must not be polluted
5. High mechanical strength, turning performance very easy processing into different seal products.
5. Linear expansion coefficient is low, after the compression prone to cold flow generated at high temperature creep or stress relaxation phenomenon, should not be used for the high temperature and high pressure parts.

Ptfe gasket using industry:

Chemical, petrochemical, refining, alkali, acid, phosphate fertilizer, pharmaceutical, pesticide, chemical fiber, dye, coking, coal gas, organic synthesis, non-ferrous smelting, steel, atomic energy and high purity products (e.g., ionic membrane electrolysis), viscous material transportation and operation, highly strict health food, beverages and other production departments.

Use of equipment:

Pipe, valve, pump, pressure vessels, heat exchanger, condenser, generator, air compressor, exhaust pipe, refrigerator flange joint sealing parts


PTFE gasket (PTFE gasket) performance parameters:

The name of the unit indicators
Dense degree of ㎏/m3 2.10 to 2.30 by 103
crystallinity % Resin 93 ~ 97
Quenching products 50 ~ 65
No hardening products from 63 to 85
Melting point 327
The thermal deformation temperature 55
vicat 110
Thermal decomposition temperature > 415
Line expansion coefficient (perpendicular to the direction of pressure) 1 / ℃ 20 ~ 60 ℃ 10.3 x 10-5
20 ~ 100 ℃ 10.5 x 10-5
20 ~ 150 ℃ 11.4 x 10-5
20 ~ 200 ℃ 12.8 x 10-5
Coefficient of thermal conductivity W/m.K 0.256
Poisson's ratio (25 ℃) 0.40
Refractive index % 1.37
Bibulous rate < 0.01
On the contact Angle of water 114 ° to 115 °
Surface expansion force N/Cm 18.5 x 10 to 5
Dielectric constant (10H2) 1.8-2.2 or less
Volume resistivity Ω m 1 x 1015 or higher
Surface resistivity Omega. > 1010
Arc resistance s P 300
The tensile strength MPa 27.6
Elongation at break % 238
Compressed modulus of elasticity MPa 280
The compression strength by 5% MPa 12.9
The impact strength (gap) KJ/m2 2.0
The bending strength MPa 20.7
Bending modulus of elasticity MPa 700
Friction coefficient (load 2 mpa) 30 mm (time) 0.11
Wear (ditto) mg 249
Grinding crack width (ditto) mm 15.8
Above for HG2-234-76 polytetrafluoroethylene (PTFE) resin the indexes stipulated in the technical standards.


doesCustomers choose according to different working conditions of use of different material, may be required to have special mining.

Ptfe gasket technology standards:

Can provide any size of standard and non-standard, including ASME, DIN, JIS, GB and other standards.Can provide round, square, such as different shape, and can according to the need for reinforced ptfe gasket type.
Domestic relevant standards:

GB/T 9126-2008 | pipe flange with non-metallic flat gasket size
GB/T 17727-08 | Marine non-metallic gaskets flange with size
HG/T 20627-2009 | steel pipe flange with non-metallic flat gasket series (Class)
HG/T 20606-2009 | steel pipe flange with non-metallic flat gasket (PN series)
QB/T 3626-1999 | ptfe rod
QB/T 3625-1999 | ptfe sheet
HG2-234-76 polytetrafluoroethylene (PTFE) resin technology standards
QB/T 3624-1999 | teflon tubing
JB/T 10688-2006 | ptfe gasket technology conditions
Does the actual application condition is complex, the above parameters are for reference only do not make any guarantee is requested.

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