PTFE Packing

PTFE Packing

PTFE packing is braided from PTFE fibers for dynamic sealing of pumps, valves and mixers in chemical, food, pharmaceutical and paper industries.

Key Features

Chemical resistance: The source lists resistance to most media, including strong acids, alkalis and organic solvents, except molten alkali metals and free fluoride ions.

Typical temperature range: -50°C to +260°C; some grades have a momentary limit of 316°C.

Low friction, approximately 0.04, reduces equipment wear and extends seal life.

Additive-free and lubricant-free grades support clean food and pharmaceutical service.

Types

Aramid-reinforced black PTFE packing: For high-pressure, high-speed dynamic sealing.

White PTFE packing: Braided virgin PTFE for contamination-sensitive service.

Oil-free white PTFE packing: Without oil or additives, for food, pharmaceuticals, fine chemicals and paper processing.

Lubricated white PTFE packing: Silicone-oil impregnation improves lubrication and sealing for corrosive, low-wear service.

Lubricated or oil-free black PTFE packing: Graphite particles improve thermal conductivity for high-temperature and high-pressure service.

Split-filament PTFE packing: Impregnation improves compression resistance for general-purpose use.

Applications

Chemical pumps and valves handling acids, alkalis and other corrosive fluids.

Hygienic seals in mixers and centrifugal pumps for food and pharmaceuticals.

Power and paper processing: Steam and abrasive-media sealing.