• Teflon gaskets (PTFE)
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PTFE gaskets

PTFE gaskets

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Applications of PTFE gaskets

Used widely in chemical processing, pharmaceutical and food contact systems, electrical assemblies and instrument lines, PTFE gaskets are often specified as flange gasket material and sealing rings where chemical inertness and dielectric strength are required. Teflon grades are chosen for their corrosion resistance, low friction and ability to minimise contamination; selected grades of ptfe can also address considerations such as reduced permeation or regulatory-facing formulations. PTFE may be less suitable where sustained high compressive loads, frequent dynamic movement or tight anti-extrusion requirements dominate, since creep and limited elastic recovery can affect long-term preload and sealing performance depending on operating conditions.

PTFE gaskets specifications

Hardness: 50–65 Shore D
Density: 2.10–2.30 g/cm³
Tensile Strength: 20–35 MPa
Elongation at Break: 200–400 %
Temperature Range: −200 °C to +260 °C
Resistance: chemicals, solvents, acids, bases, moisture

PTFE (Teflon) is known for its excellent chemical resistance, very low friction, and outstanding performance at extreme temperatures.

Custom production

In addition to standard PTFE gaskets, we can CNC cut custom shapes and dimensions to your drawing. Suitable for prototypes, small series and repeat production.

FAQ

What are PTFE gaskets used for?

PTFE gaskets, sometimes referred to by the trade name Teflon, are used to seal joints in piping, valves, flanges and process equipment where chemical resistance and electrical insulation are required. They are selected when material inertness and low friction are important to reduce the risk of media reaction or contamination.

What chemical resistance do PTFE gaskets provide?

PTFE gaskets offer exceptional resistance to a wide range of chemicals, including acidic, alkaline and solvent media. Their chemical inertness makes them suitable for aggressive process fluids and helps minimise interaction between the gasket and the sealed media.

What is the difference between PTFE gaskets and elastomer gaskets?

PTFE gaskets provide chemical inertness, low surface friction and good dielectric strength, while elastomer gaskets offer greater elasticity and conformability to accommodate flange irregularities. The appropriate choice depends on the chemical environment and required sealing behaviour.

Are PTFE gaskets suitable for flange gasket applications?

PTFE gaskets are commonly used as flange gaskets in industrial piping and equipment where chemical compatibility and low friction are priorities. Proper selection and installation should consider flange condition and sealing requirements; contact the supplier for technical advice if needed.