PTFE Envelop Gasket Flange Seal

Description:

PTFE envelope gaskets are widely used in ISO tank containers due to their unique properties. Here are their advantages and disadvantages:

Advantages:
1. **Chemical resistance**
- PTFE can resist almost all chemicals and is suitable for corrosive environments such as strong acids, strong alkalis and organic solvents.
2. **Temperature resistance**
- It can remain stable in a wide temperature range of -200°C to +260°C, suitable for extreme temperature conditions.
3. **Low friction coefficient**
- Smooth surface, low friction coefficient, reduced wear and extended service life.
4. **Non-stickiness**
- The surface is non-sticky, easy to clean, and prevents material adhesion.
5. **Good sealing performance**
- Good elasticity, can effectively seal and prevent leakage.
6. **Electrical insulation**
- Excellent electrical insulation performance, suitable for electrical applications.

Disadvantages:
1. **Low mechanical strength**
- Poor mechanical strength, prone to cold flow and creep, not suitable for high-pressure environments.
2. **Poor wear resistance**
- Poor wear resistance, easy to wear, especially in high pressure or high speed movement occasions.
3. **High cost**
- Compared with other materials, PTFE is more expensive.
4. **Difficult processing**
- Complex processing, requiring special equipment and processes.
5. **High thermal expansion coefficient**
- Large thermal expansion coefficient, poor dimensional stability when temperature changes.
6. **Not suitable for radiation environment**
- Easy to degrade and performance degraded in radiation environment.

### Summary:
PTFE envelope gaskets have excellent chemical resistance, temperature resistance and sealing, but low mechanical strength, poor wear resistance and high cost. When choosing, you need to weigh it according to the specific application scenario.

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We are PTFE Envelop Gasket Flange Seal supplier and PTFE Envelop Gasket Flange Seal company, we offer PTFE Envelop Gasket Flange Seal wholesale service. SUNPASS, founded in 1979, specializes in the production of industrial sealing and thermal insulation materials. Serving new tank container manufacturer, manhole cover manufacturer, valve manufacturer, hazardous chemicals manufacturer, depot, transport logistics companies, cleaning and maintenance service companies and trade companies at home and abroad.

Supply to the world's top 6 tank container manufactures, such as CIMC, SINGMAS, etc
China's first national brand SUNPASS for tank accessories
ISO 9001 system certification, 26 patents and trademarks
Strict internal control, professional team, 6 senior technical experts with more than 20 years experience, 87% professional customer service staff with more than 3 years experience, 8 quality inspectors with more than 5 years experience
Member of ITCO and Tank Container Development Alliance
Over 200 workers, 18000M2 workshop
12 sets of German equipment & advanced technology
Distributor: Netherlands, Indonesia, Thailand, India

SunPass includes Tenglong Sealing, TopSealing and Sunpass. Tenglong laid the foundation for the development of Top Sealing and SUNPASS. Top Sealing Focus on export business, and SUNPASS focus on Tank Container Spare Parts. Sunpass/TopSealing departments: Finance(3), Research and Development(8), Technical(8) , Sales(9), Manufacturing(50), Production Material Control(40) and Administrative&Human Resources Department(6).

SUNPASS has sealing products workshop, dust cap workshop, thermometer workshop, pressure gauge workshop, and so on. The products involve manlid sales, super tank seals, flanges gaskets, teflon gaskets, O rings, FEP encapsulated manlid seal, dust caps, thermometers, pressure gauges, swing bolts, document holders, walk way, frame gauze, one way ball valve, flanges, as well as other accessories. SUNPASS products are exported to Netherlands, United States, France and all over the world.