PTFE Teflon Gasket

PTFE Teflon Gasket

 

PTFE gaskets are primarily made from Polytetrafluoroethylene (PTFE), a synthetic fluoropolymer of tetrafluoroethylene.

Gasket are mechanical components use to create seals at the point of connection between two pieces of equipment.

PTFE (Polytetrafluoroethylene), commonly known by the brand name Teflon, is a highly versatile and widely used material for gaskets.

PTFE gaskets are known for their exceptional chemical resistance, low friction, and wide temperature range, making them ideal for sealing in a variety of industrial applications.

 

 

 

PTFE Teflon Gasket Properties :

• PTFE is virtually chemically inert, meaning it resists almost all chemicals, including acids, bases, and solvents. This makes PTFE gaskets suitable for use in aggressive chemical environments.

• PTFE can operate effectively in a wide temperature range, from -200°C to +260°C (-328°F to +500°F).

• The non-stick properties of PTFE prevent substances from adhering to the gasket, making it easier to remove and replace.

• PTFE is an excellent electrical insulator, making it useful in applications where electrical conductivity must be minimized.

 

 

 PTFE Teflon Gaskets Types : 

01. Virgin PTFE Gaskets

• Material: 100% pure PTFE (Polytetrafluoroethylene), with no fillers or additives.
• Appearance :  White, opaque material with a smooth surface.

• Virgin PTFE  Typically density around 2.16 g/cm³.

• PTFE Melting Point  Approximately 327°C (621°F).

• Virgin PTFE gaskets are generally suitable for applications with pressures up to approximately 55 bar (800 psi).

• Highest chemical resistance and is suitable for the most demanding chemical applications.

 

02. Filled PTFE Gaskets

• Contains fillers like glass, carbon, or graphite to improve mechanical strength, wear resistance, or thermal conductivity.

• Filled PTFE gaskets generally offer higher pressure resistance than Virgin PTFE, with typical pressure resistance ranging from 80 bar (1160 psi) to 150 bar (2175 psi).

 

Composition and Types of Fillers :

• Glass Fiber Filled PTFE: Increases compressive strength and wear resistance.

• Carbon Filled PTFE: Enhances electrical conductivity and thermal conductivity, while also improving wear resistance.

• Graphite Filled PTFE: Provides better thermal conductivity and improved lubricity.

• Bronze Filled PTFE: Increases wear resistance and thermal conductivity.

• Molybdenum Disulfide (MoS₂) Filled PTFE: Improves wear resistance and reduces friction.

• Ceramic or Mineral Filled PTFE: Increases hardness and dimensional stability under high temperatures.

 

 Color Coding :

• Glass Fiber Filled PTFE: Typically off-white or light beige.

• Carbon Filled PTFE: Black.

• Graphite Filled PTFE: Dark grey or black.

• Bronze Filled PTFE: Brown or dark brown.

• Molybdenum Disulfide (MoS₂) Filled PTFE: Grey.

• Ceramic or Mineral Filled PTFE: White or light grey.

 

03. Expanded PTFE (ePTFE) Gaskets

flexible and compressible than standard PTFE.

ePTFE gaskets can function effectively in extreme temperatures, from -240°C to +270°C (-400°F to +518°F).

 

 

 

 

 

 

 

04. PTFE Envelope Gaskets 

Consist of a soft filler material (like rubber or compressed fiber) encased in a PTFE envelope.

Used in applications where both chemical resistance and a tight seal are necessary.

 

 

 

 

 

 

 

 

Applications Of PTFE Teflon Gaskets :

• Chemical industry, Pharmaceutical industry , food industry, oil and gas industry, water treatment  industry, Aerospace are also use PTFE gasket.
• In application in which liquids or gases are transmitted through pipes, hoses or tubing, gasket are prevent leaking and loss of pressure at connection points.

 

PTFE Teflon gasket Uses :

• When chemical resistance is required.

• When high temperature resistance is required.

• When non-stick properties are required.

• When low permeability is required.

• When corrosion resistance is required.

• When a long lifespan is required.

 

PTFE Teflon Gasket Advantage :

• PTFE gaskets are resistant to most chemicals, including acids, bases, and solvents. Suitable for almost all chemicals.

• function effectively in both high and low-temperature environments.

• Resistant to wear, corrosion, and weathering, ensuring a long service life.

• PTFE gaskets require minimal maintenance and can be easily cleaned and reused.

• PTFE gaskets are a cost-effective option compared to other gasket materials.