thoenes P638 - Polyimide- PTFE- Graphite packing

The thoenes® P638 polyimide PTFE graphite packing is made from graphite filled PTFE multifilament fibers and polyimide continuous filament fibres.

Important features:

• Good gliding properties,
• Pressure resistant,
• Good resistance to organic solvents; Fuels, lubricants and wastewater,
• Polyimide fibers have good acid resistance,
• Not resistant to highly concentrated alkalis, alkali metals; fluorine compounds at high temperatures.

polyimide

• Max. continuous temperature 230 - 260 °C,
• Short term 300 - 400 °C possible,
• From 300 °C clear shrinking process.

Graphite filled PTFE multifilament fiber

• Max. continuous temperature 250 °C,
• Short term 280 °C possible.

Fields of application:

• Centrifugal and piston pumps,
• Valves and mixers,
• Agitators and reactors.

Physical forms:

• Square or rectangular packing,
• Zebra braid,
• Dimension: 5-25 mm *
  

* other dimensions on request