Valve Spare Parts 100% Virgin Teflon PTFE Seal

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Product Details


SUNPASS all gaskets are made from the highest quality PTFE compounds supplied by world leading manufacturers. They are precision manufactured components designed specifically to give long life with high integrity sealing

Application   Data

1. Performance Density: 2.10-2.30 G/CM3
2. Tensile Strength: 15Mpa
3. Elongation At Break: 150%
4. Solution Of Electric Intensity: 10KV/MM
5. Temperature: -180C to +260C

Valve Spare Parts 100% Virgin Teflon PTFE Seal










1. What is your MOQ?

MOQ may vary by customer's special requirement; we try our best to meet your business requirement.  

2. What's your payment terms?

We normally do T/T, and we can also offer western union account for transfer money. And more flexible payment terms, welcome to have a discuss.  

3. Can you provide samples?

Yes, we can offer samples, and some samples are free  

4. Can you delivery by express?

Yes, we can delivery by any express.  

5. When will the sample be ready?

Normally, the sample can be ready in 3 days.

Mechanical properties Its friction coefficient is extremely small, only 1/5 of polyethylene, which is an important feature of the perfluorocarbon surface. Moreover, since the intermolecular force of the fluorine-carbon chain is extremely low, the polytetrafluoroethylene has no stickiness.

Polytetrafluoroethylene maintains excellent mechanical properties in a wide temperature range of -196 to 260 ° C. One of the characteristics of perfluorocarbon polymers is that they are not brittle at low temperatures.

Chemical and Weather Resistance In addition to molten alkali metals, PTFE is virtually free of any chemical attack. For example, in concentrated sulfuric acid, nitric acid, hydrochloric acid, or even boiling in aqua regia, there is no change in weight and performance, and it is almost insoluble in all solvents, and is slightly soluble in per-alkane (about 0.1 g/100 g) only above 300 °C. PTFE does not absorb moisture, is non-combustible, and is extremely stable to oxygen and ultraviolet rays, so it has excellent weather resistance.

Electrical Properties Polytetrafluoroethylene has low dielectric constant and dielectric loss over a wide frequency range, and high breakdown voltage, volume resistivity, and arc resistance.

Radiation resistance PTFE has poor radiation resistance (104 rad), which is degraded by high-energy radiation, and the electrical and mechanical properties of the polymer are significantly reduced.

Polytetrafluoroethylene is produced by radical polymerization of tetrafluoroethylene. The industrial polymerization is carried out by stirring in the presence of a large amount of water to disperse the heat of reaction and to facilitate temperature control. The polymerization is generally carried out at 40 to 80 ° C under a pressure of 3 to 26 kgf/cm 2 , and an inorganic persulfate or an organic peroxide may be used as an initiator, or a redox initiation system may also be used. An exotherm of 171.38 kJ per mole of tetrafluoroethylene was polymerized. The dispersion polymerization requires the addition of a perfluoro type surfactant such as perfluorooctanoic acid or a salt thereof.

Applications Teflon can be formed by compression or extrusion; it can also be made into an aqueous dispersion for coating, impregnation or fiber making. PTFE is widely used in atomic energy, aerospace, electronics, electrical, chemical, machinery, instrumentation, instrumentation, construction, textile, food and other industries as high temperature resistant, corrosion resistant materials, insulating materials, anti-stick coatings, etc.

PTFE sealing ring PTFE (polytetrafluoroethylene) composite material is a kind of PTFE-containing two or more different properties or different phase materials blended, copolymerized or combined to form a performance superior to its constituent materials. 

Through material compounding, it not only exerts the excellent characteristics of PTFE, but also overcomes the shortcomings of cold flow creep and non-wear resistance of PTFE, so that it has antifriction, wear resistance, self-lubrication, corrosion resistance, heat resistance, aging resistance and resistance.Compression, creep resistance, dimensional stability and low coefficient of linear expansion, and improved thermal conductivity and hardness, reducing costs. This type of composite material has been used at home and abroad to make seals for special working conditions, such as high pressure, high temperature, high speed, high vacuum, flammable and explosive, toxic, highly corrosive media, etc.

These seals are widely used in petrochemical industry. In the chemical fertilizer, pesticide, aerospace, aerospace and nuclear industries, it is often used as a seal for reciprocating axial movement, such as the sealing of pistons and piston rods. It can be used for dry friction and oil-free lubrication, and oil lubrication can be carried out when conditions permit.