Basic information :
 
PTFE valve seals are single acting, spring-energized seals which are used for dynamic and static applications. Ptfe valve seals are effective in a wide range of applications.

They are chosen when higher resistance to chemical media is required, if the ptfe valve seals is required to operate in extremes of temperature and where good extrusion and compression characteristics are needed.

main design characteristics:
1. Application specific U-shaped seal profile
2. Spring geometry suited to the particular application
3. Proven high-performance ptfe valve seals polymers Standard products are available from 2 mm up to 2500 mm (8' 2") in diameter along with custom manufactured intermediate sizes, inch (imperial) sizes or special Geometries.
  
Performance :
The different types of PTFE valve seals combined with the properties of  PTFE valve seals materials offer design engineers a wide range of solutions to a large number of applications.

The most important characteristics of PTFE valve seals are listed below:
Very low coefficient of friction
Good dynamic and static sealing
Capable of sealing at high speeds up to 15 m/s (49 ft/sec)
Almost universal chemical compatibility
Operating temperature of -253 °C up to +300 °C (423 °F to 572 °F)
Very good thermal resistance
Permanent elasticity unaffected by contact with chemicals
Good ageing characteristics
Low compression set
Capable of withstanding high pressures above 200MPa (2000 bar, 29000 psi) when using B ack-up Rings