NES manufactures encapsulated O-Rings comprising an elastomeric core, which has a seamless jacket made from fluoropolymer. The jacket can be either FEP (Fluorinated Ethylene Propylene) or PFA (Perfluoroalkoxy) with the elastomeric core being either Viton or Silicone. The distinct advantage of having a fluoropolymer jacket over the solid PTFE O-Ring / PTFE Envelope or PTFE Coated is that PFA & FEP are not prone to cold flow and the inner core is protected from solvent ingress. Apart from being resistant to mildew growth the fluoropolymer exhibit very low friction properties thus eliminating “stick slip” tendencies. Viton is the best all round core material with the ability to recover
from deformation even after long periods of compression. Silicone energising core is used mostly for its ability to work at extreme temperature while maintaining full flexibility.
Where dynamic applications need to be considered silicone can be supplied with a solid or hollow core coupled with its energising properties resulting in reduced wear to the fluoropolymer jacket, increasing the seal life.
Northern Engineering, the world’s premier producer of O Ring products, introduces you to our latest product development.
We are pleased to announce that Northern Engineering have successfully developed a range of Inflatable seals.
These products can be widely used across a range of industries including Aerospace: Doors/hatchways, wind tunnels, jet engine test cells, cockpit canopies. For more information please contact us directly.