Pilotpack 8500


PILOTPACK 8500 has been designed for very high-temperature valve, slow rotating and static applications. Each strand of the high-temperature BCX yarn is impregnated with a high-temperature lubricant and additional mechanical strength provided by high-temperature nickel alloy wire reinforcement.

The resultant packing is dense, firm and uniformly lubricated with a low coefficient of friction.
It is designed for use in rotary, reciprocating, valve and static equipment, across a range of product applications, but specially designed for hot air and gases up to a maximum temperature of 750˚C.


  • Designed especially for use on hot air and gases.
  • Suitable for use on slow rotating equipment.
  • Ideal for sealing high temperature ducting and exhaust manifolds.
  • Designed to operate across a full range of equipment.
  • Easy to install and manufactured to give long operating life.

Chemical Compatibilities

For the pH range 3-13, the packing is chemically inert. For steam applications, please consult Beldam Crossley.

Sizes Available

All square sections from 3mm (1/8”) to 25mm (1”) are generally available from stock and supplied in differing lengths depending on the cross-section. Larger and rectangular sections can be manufactured to order. Packing can also be supplied in preformed or die formed rings.

Rotating applications

Speed: 1 m/s
Temperature range: up to 700˚C
Maximum pressure: up to 10 bar

Valve applications

Speed: 1 m/s
Temperature range: up to 700˚C
Maximum pressure: up to 150 bar

PTFE Design

Beldam Crossley can create PTFE products to your specification, creating a product with the correct PTFE grade material that works best for your application.

Contact our team of design engineers with your requirements and see how we can help you.


Beldam Crossley has been moulding PTFE for over half a century. We have since developed a wide range of High Performance Crossflon® materials, each suited to a specific application.

Pilotpack 8500. Refined silica packing with special reinforced and lubricant for high temperature valves.