Parker O-rings for Fluid Sealing 

O-rings from Parker seal fluids and gases

O-rings and seals from Parker Seal and Chomerics are available in standard sizes and compounds including Viton® O-rings, Silicone O-rings, perfluoroelastomer FFKM O-rings, Buna O-rings, Aflas O-rings, Urethane O-rings, Fluorosilicone O-rings, Buna O-rings, Metric Viton® O-rings, Neoprene Metric O-rings, Encapsulated O-rings. 

Custom O-Rings

O-rings can be custom made to fit your engineered gland. When a custom designed o-ring is applied in a properly designed gland, it will seal against a variety of high temperatures (high temperature o-rings), cryogenic conditions, and chemicals.

O-rings and seals are used in a variety of static and dynamic applications, and can complement gaskets and other sealing devices. Common o-rings include Viton FKM o-rings, buna rubber o-rings, silicone o-rings, fluorocarbon o-rings, nitrile o-rings (NBR), EPDM o-rings, butadiene o-rings, chloroprene o-rings, and fluorinated o-rings,  O-rings are available in sizes to fit most sealing applications, and o-ring sizes can be found in the Parker O-Ring Handbook.   Sealing Devices is an authorized Parker O-rings Sealing Technology Center.

The Parker Engineering o-ring chemical compatibility chart compares elastomeric compounds, and highlights resistance to chemicals. The Parker O-ring Handbook also lists comparison properties for Viton, Fluorosilicone, Silicone, Aflas, Butadiene, Butyl, Chlorinated Polyethelene, Epichlorohyrdin, Ethylene Acrylic, EPDM Ethylene Polypropylene, Fluorocarbon, Isoprene, Neoprene, HNBR, Nitrile, Perfluoroeleastomers, Polyacrylate, polyurethane, SBR and silicone rubbers.

An important consideration for the seal and design of o-rings or seals is compression set  - the amount that an elastomer returns to its original thickness after having been compressed. Factors critical to compression set include the amount of squeeze over time, temperature variations, and fluid contact.

The Most Important Criteria in Choosing O-rings Include:


Compatibility between the orings and the fluid to be sealed.  Refer to the Parker O-ring Chemical Compatibility chart.

Operating temperature (or a range of temperatures) is important when designing the gland. A gland operating at high temperatures may require increase volume to compensate for the thermal expansion or swelling of the o-ring, or orings. Conversely, when low temperature sealing is required, a more shallow gland depth might result in producing the proper squeeze for an effective seal.

Pressure is important in determining the hardness (durometer) of an o-ring.  Durometer specifications can be determined by consulting the Parker O-Ring Handbook.  Sealing Devices offers a full line of Parker Seal o-rings, stat-o-seals (fastener seals), lathe cuts, packing, extruded seals, molded shapes, seals and tubing.  Let Sealing Devices provide o-rings to seal your application.

We offer a variety of compounds for your specialized oring applications including Viton, Silicone, Kalrez perfuoroelastomers, and many others in custom configurations.  Applications include industrial, aerospace, military, electronic device sealing and shielding.  Find popular Parker o-ring sizes and compounds online.

To inquire about additional information please contact us today 716-684-7600.   Sealing Devices is an authorized Parker Sealing Technology Center and Parker distributor.