PTFE Gaskets

PTFE gaskets are widely used for static sealing in industrial piping, valves, pumps, heat exchangers and processing equipment. Their broad chemical resistance makes them a practical choice for many applications involving corrosive fluids, solvents and other process media.

Available in different PTFE grades, shapes and thicknesses, these gaskets can be supplied for standard flange connections as well as non-standard equipment sealing requirements.

PTFE Gasket Materials

Virgin PTFE Gaskets

Manufactured from unfilled polytetrafluoroethylene, virgin PTFE gaskets offer excellent resistance to a wide range of chemicals and have low adhesion to mating surfaces.

They are commonly used in chemical processing, fluid handling and general static sealing applications. Because unfilled PTFE can deform gradually under sustained compression, flange design and gasket loading should be considered during selection.

Filled PTFE Gaskets

Filled PTFE incorporates reinforcing or modifying materials to improve selected mechanical properties. Common formulations include glass-filled, carbon-filled and graphite-filled PTFE.

The properties of filled PTFE depend on the filler type and concentration. Different grades may offer improved resistance to deformation or wear, but chemical compatibility must be checked for the complete material formulation.

Expanded PTFE (ePTFE) Gaskets

Expanded PTFE has a compressible structure that allows it to conform to flange surface irregularities.

It is used in selected industrial flange connections and equipment sealing applications, particularly where good surface conformity is required. Expanded PTFE is available in sheet and cut-gasket forms, with gasket tape also used for certain applications.

Gasket Types & Configurations

Full Face Gaskets

Full-face PTFE gaskets include bolt holes and are commonly used with suitable flat-face flange connections. Dimensions and drilling patterns can be matched to the applicable flange standard.

Ring Type Gaskets

Ring-type PTFE gaskets fit within the flange bolt circle without bolt holes. They are used with suitable raised-face flanges and other compatible flange arrangements.

Flat & Equipment Gaskets

PTFE gaskets can be cut into circular, rectangular, oval and other shapes for equipment covers, valve connections, heat exchangers and static sealing surfaces.

Custom Cut Gaskets

For non-standard equipment, PTFE gaskets can be produced according to customer drawings, dimensional specifications or physical samples. Material grade, thickness, hole positions and gasket profile can be specified to suit the application.

Industrial Applications

PTFE gaskets are used in a wide range of industries and equipment, including:

• Chemical processing and fluid transfer systems

• Industrial piping and flange connections

• Pumps, valves and fittings

• Heat exchangers and process equipment

• Water treatment and filtration systems

• Food and pharmaceutical processing equipment, where the selected material grade meets the applicable requirements

• Industrial maintenance and replacement projects

Material Selection & Sealing Considerations

Selecting a PTFE gasket involves more than choosing the material grade. Operating temperature, pressure, chemical exposure, flange surface condition and available bolt load all influence sealing performance.

PTFE offers broad chemical resistance, but its mechanical behavior differs from rubber and fiber-based gasket materials. Creep and stress relaxation should be considered, especially in joints exposed to sustained compression or temperature changes.

For replacement applications, the existing gasket material and dimensions should be checked before ordering. Where operating conditions are uncertain, customers should provide the relevant service information for material review.

Custom Manufacturing & Bulk Supply

CORA SEALS supplies PTFE gasket options for industrial distributors, equipment manufacturers, maintenance contractors and piping suppliers.

Standard dimensions and custom-cut designs can be reviewed according to drawings, samples or technical specifications. Different material grades and gasket configurations can be sourced to match project and replacement requirements.

Request a Quote

Please send us the required PTFE grade, gasket dimensions, thickness and quantity. For standard flange gaskets, include the flange standard, nominal size and pressure class.

For custom parts, technical drawings or samples are helpful. Information about the operating medium and temperature can also help us review the material requirements before quotation.