• FEP PTFE Encapsulated O-Rings combine ultimate chemical resistance of FEP PTFE with the compressability of rubber or steel spring core.

• Select from the various core options to satisfy your application

• FEP PTFE stiffness can require custom gland design to maximize sealing by using the right amount of compression force to maintain a seal without over compressing which can shorten seal life.  FFKM and Spring Energized Lip Seals are alternatives.

• Some diameters and cross sections are too small to produce.Inner Diameter not less than 5.28mm, and Cross Section not less than 1.78mm.  FFKM O-Rings are and alternative.

FEP type PTFE Fluoropolymers (performance plastics) offer excellent chemical and temperature resistance, but lack the resiliency of elastomers (rubber) required to maintain a quality seal.  Encapsulated and spring energized seals combine the best sealing features of plastics, elastomers and steel springs to increase chemical and temperature performance compared to most solid elastomers.  The main offsetting limitation is PTFE's stiffness that can require custom gland design to maximize sealing by using the right amount of compression force to maintain a seal without over compressing which can shorten seal life.  PFA type PTFE is also available for additional upper temperature resistance (up to +575° F short exposure) but not widely used due to reduced sealing performance.

Let us know if you require materials to meet the following standards: ROHS2.0,NSF,ASTM, FDA ,KTW, WRAS,USP Class VI, or NORSOK M-710,We have many special compounds that can meet the specification you are looking for.

http://www.oring-seal.com/