DNA Gasket Products supplies high-quality PTFE Gaskets, Expanded PTFE Products and PTFE Envelope Gaskets for demanding industrial sealing applications. Our PTFE sealing solutions are available for industries and businesses across Pune and Pimpri-Chinchwad, including Chikhali, Talawade, Chakan, Nighoje, Bhosari, Chinchwad, Tathawade, Bhamboli, Savardori, Talegaon MIDC, Narhe, Shivane, Hadapsar Industrial Estate, Ranjangaon and Baramati.
We also serve industrial requirements in major manufacturing and industrial areas including Shirwal, Mahape MIDC, Taloja MIDC and Turbhe MIDC, providing dependable PTFE sealing solutions for piping systems, pumps, valves, chemical processing equipment and other industrial applications.
Polytetrafluoroethylene (PTFE) is almost chemically inert being attacked only under extreme conditions by molten alkali metals, certain fluorine compounds at elevated temperature and nuclear radiation. In this respect PTFE is very useful as a gasket material, but unfortunately, the material has a tendency to creep under load and has limited use in such applications.
Modified PTFE materials allow the benefits of PTFE to be utilized at higher compressive loads and higher temperatures. Expanding the PTFE, for example, produces a softer material with a higher strength than conventional PTFE. Whereas the addition of a filler such as silica, silicon carbide or barium sulphate lends the material better hot and cold flow resistance without negatively affecting the chemical resistance.
PTFE can also be used as an envelope to a more conventional compressed fibre gasket material insert. This combines the chemical resistance of the PTFE with the stress retention and recovery properties of the insert and reduces the negative effect of the PTFE on the joint’s mechanical stability.
General Properties of PTFE
- Outstanding chemical resistance
- Suitable for use with foodstuff's and pharmaceutical applications
- Insoluble in solvents, even at increased temperature
- Stable to light
- Does not absorb water
- Excellent electrical insulating capacity
- Low thermal conductivity
Expanded PTFE
Expanded PTFE materials has good creep resistance and bolt torque retention properties allowing it to be used to higher temperatures and to seal higher internal pressures. Expanded PTFE tape form with a pressure sensitive adhesive backing strip to assist with installation. Since the material is available in roll form it offers a solution to jointing needs without the need to maintain large stocks of cut gaskets
Properties
- Good mechanical properties at low to medium temperatures
- Excellent chemical resistance
- Highly compressible
- Available in sheet form and as cut gaskets
PTFE Envelope with compressed fibre insert Properties
- Excellent chemical resistance
- PTFE envelope gaskets comprise a compressed synthetic fibre gasket material insert with a PTFE envelope. The PTFE envelope protects the gasket from chemical attack. The insert provides the strength and resilience needed for demanding sealing operation
- This gasket offers excellent chemical resistance under moderate conditions of temperature and pressure