FDA Food-Grade
Review the specific compound, intended food contact, cleaning conditions and supporting documentation.
O-RINGS
O-Rings for Industrial Sealing Applications
We supply O-rings and support material selection and application review. Start with your drawing, sample, dimensions or operating conditions.
01 / BY MATERIAL
Start with a material requirement
Already have a material reference? Choose a direction below to discuss it. The specific compound, dimensions and operating conditions still need review. Special constructions are listed separately below.
FFKM O-Rings
FFKM combines elastomeric sealing with resistance to many demanding chemical and thermal environments. Consider it when an existing elastomer does not meet the application requirements. The specific compound, media, temperature history and sealing arrangement still require review; FFKM is not automatically the best option.
ExploreFVMQ O-Rings
FVMQ combines silicone-like low-temperature flexibility with improved resistance to selected fuels and oils compared with conventional silicone. It is a direction to review for cold, fuel-exposed static seals. Confirm the actual fluid and compound; friction, wear and tear limitations need separate consideration in moving applications.
ExploreAFLAS FEPM O-Rings
FEPM is a material direction for selected steam, hot-water, amine and alkaline-media requirements. Review the exact fluid, concentration, exposure sequence and temperature together with the sealing arrangement. Suitability depends on the specific compound; a material or brand name alone does not establish application compatibility.
ExploreHNBR O-Rings
HNBR offers a direction to review where oil exposure combines with mechanical demands, heat aging or ozone exposure. Hydrogenation improves selected characteristics compared with conventional NBR, but compounds differ. Check the actual fluid, additives, cold-start conditions and gland design rather than assuming a direct material upgrade.
ExploreFKM O-Rings
FKM is a material direction for selected oil, fuel and chemical exposures where heat resistance also matters. Review the specific compound against the complete service conditions. Low-temperature recovery, steam and certain chemical environments require particular attention; a general FKM designation does not establish universal compatibility.
ExploreGLT O-Rings
GLT is a low-temperature FKM direction to consider when cold recovery and sealing contact are concerns with conventional FKM. Review cold starts, media, pressure changes and gland geometry together. Compound test data can support comparison, but does not independently establish the operating limit of the finished seal.
ExploreEPDM O-Rings
EPDM is a material direction for selected water, hot-water, steam and cleaning-media applications, with useful resistance to weathering and ozone. Confirm the compound and combined exposure conditions. Petroleum oils and hydrocarbon fuels are generally not the starting point for EPDM selection; food-contact requirements need separate evidence.
ExploreVMQ (Silicone) O-Rings
VMQ silicone offers flexibility across varied temperatures and resistance to weathering and ozone, making it a direction for selected static sealing requirements. Review the actual compound and media. Tear strength, abrasion and gas permeability can limit an application; silicone is not a universal choice for oil or fuel exposure.
ExploreNBR (Buna) O-Rings
NBR is a material direction for selected mineral-oil and grease applications where useful mechanical and wear characteristics are required. Compound formulation affects the balance between oil resistance and cold flexibility. Check additives, temperature and exposure conditions; conventional NBR needs particular care with ozone and prolonged outdoor weathering.
ExplorePTFE O-Rings
Solid PTFE O-rings have a PTFE body without an elastomer core. They may be considered for suitable static sealing arrangements where chemical exposure is important. Limited elastic recovery, creep and installation constraints require specific gland review; they are not direct replacements for conventional rubber O-rings.
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Not sure which material to consider? Explore Material Selection →
02 / SPECIAL CONSTRUCTIONS
Start with the product construction
For encapsulated and coated O-rings or custom large-diameter requirements, share your drawing, sample or dimensions so the construction, material and application can be reviewed together.
FEP/PFA Encapsulated O-Rings
An FEP or PFA jacket forms the media-contact barrier around an elastomer core that provides elastic support. Consider this construction for suitable chemical-sealing requirements, mainly in static arrangements. Jacket and core compatibility, permeation, installation access and gland geometry need review; it is not solid PTFE or a surface coating.
ExplorePTFE-Coated O-Rings
A PTFE surface coating is applied to an elastomer O-ring to address specified handling or friction requirements. The rubber body still provides the elastic seal. Confirm the base compound, coating system, dimensions and wear conditions; a thin coating is not an encapsulated chemical barrier or a remedy for incompatible rubber.
ExploreCustom Large-Diameter O-Rings
Custom large-diameter O-rings are reviewed by dimensions, compound, gland design and quality requirements rather than treated as a separate material. Manufacturing may use one-piece compression molding or segmented molding with stepwise vulcanization. Confirm the suitable approach, handling and inspection requirements for the specific geometry and project.
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03 / BY APPLICATION
Start with the operating condition
Use the application as a starting point for discussion. These paths describe what needs review, not a material rating or a performance guarantee.
High Pressure
Review pressure cycles, extrusion gaps, materials and gland design for O-rings and any supporting back-up rings.
Chemical Exposure
Describe the exact media, concentration, mixtures and cleaning exposure, together with temperature and seal geometry. These conditions frame the material review.
High Temperature
Share normal and peak temperatures, exposure duration, thermal cycling and sealed media. Temperature alone does not establish suitability.
Low Temperature
Share the minimum operating and start-up temperatures, sealed media, pressure and whether the seal is static or dynamic. The compound and sealing design need review against these conditions.
04 / STANDARDS & DIMENSIONS
Share the dimensions or reference you have
Available inside diameter, cross-section and units help identify the requirement. If a drawing specifies tolerances, include them in the discussion.
A standard designation such as AS568 or JIS, a size code, part reference or sample information can also provide a starting point. Confirm the exact standard and revision where available; a reference alone does not determine material suitability.
Understanding O-Ring Dimensions
For a conventional round-section elastomer O-ring, Inside Diameter (ID) is the diameter of the opening; Cross-Section (CS) is the diameter of the circular section through the ring body. Describe the size as ID × CS, with units, in the free state: uninstalled and unstretched. These are seal dimensions, not shaft or groove dimensions.
A standard size code provides a dimensional reference; a drawing records specified dimensions and tolerances. A sample measurement records its current condition. Wear, swelling or permanent deformation can change a used sample's dimensions, so measurements alone cannot establish the original size or tolerances.
Information Helpful for an O-Ring Enquiry
These details help clarify the specification. Share whichever you have—you do not need all six to make an enquiry. A drawing, sample or available dimensions can be enough to start the discussion.
- 01
Size or reference: ID, CS and units; OD if available; a standard and revision, size code or part number; any specified dimensional tolerances.
- 02
Material and compound: Any specified material, compound or technical specification, or the original part reference.
- 03
Hardness: Any specified value, scale and permitted range.
- 04
Quantity: The quantity needed; distinguish repeat orders from trials of a new specification, where relevant.
- 05
Operating conditions: Known media, temperature, pressure and whether the seal is static or moving; the reason for replacement, if relevant.
- 06
Drawings, samples and acceptance requirements: Drawing number and revision; whether a sample is unused or service-exposed; any particular sample, inspection or documentation requirements.
You do not need a complete specification to begin. Describe what is available, and missing information can be clarified during the review.
05 / RELATED PATHS
Need Help Choosing?
06 / TECHNICAL REVIEW FAQ
Start with what you have
Can I start without a drawing?
Yes. A sample, dimensions, photo, part number, or a description of the sealing issue can provide the starting point.
What information helps the review?
Share the information available, such as media, temperature, pressure, motion, seal geometry, or operating history. Missing information can be identified during the review.
What happens after I send a requirement?
We review the available requirement, clarify the next information needed where relevant, and respond with the appropriate next step.
NEXT STEP
Bring the requirement you have.
Start with a drawing, sample, dimensions, photo, part number, or application issue.
Request a Technical Review
Initial response within 12 hours.