Sealmor Provides Chemical Resistance and Excellent Mechanical Properties
Specifying O-rings is a compromise, at best. A matter of balancing trade-offs between various properties and fluid resistance - particularly for hostile environments involving high temperature and pressure, or highly corrosive fluids.
That's because elastomers that rersist chemicals typically lack certain mechanical properties. And, elastomers that resist abrasion and compression set usually provide unacceptable resistance to certain chemicals.
Consider FEP and PFA - They are unaffected by most chemicals even at elevated temperatures and pressures. They have exceptoinal dielectric properties. And, remain tough and flexible under most conditions.
FEP and PFA, however, are not easily compressed, and are subject to severe compression set. They also cold flow or "creep" under load, and may require retightening.
The Best of Both Worlds
Sealmor O-rings overcome limitations by encapsulating a core of either silicone or Viton*. Both provide superior resistance to compression set throughout a wide temperature range.
Fluorocarbon elastomers (Viton) also provide excellent physical properties, including high elongation for better flex, even at temperature extremes.
The result is a superior performing family of O-rings with excellent mechanical properties; excellent "recovery"; and excellent chemical resistance over a wide range of operating conditions.
Solid or Hollow-core Design
Seamor O-rings with solid cores can be used with static applications and certain dynamic applications where tightening forces are not restrictive.
Hollow-core designs are more flexible and easier to squeeze. They are ideal for dynamic applications where O-rings must be compressed with minimal force.
*Viton is a registered trademark of DuPont Company,