PFA Encapsulated Silicone O Ring

• 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/