50-80 Shore A Hardness EPDM O-Rings Steam Resistant Sealing Rings for Outdoor Use

50-80 Shore EPDM O-Rings Steam Weather Ozone Resistant Seals for Water and Outdoor Use

EPDM O-rings for water systems and outdoor enclosures can be specified within the 50-80 Shore A hardness range. Select hardness together with groove dimensions, seal squeeze and closure force. For steam valves, provide steam temperature, pressure and exposure cycles so the EPDM compound and cure system can be reviewed for the service.

Features

• 50-80 Shore A range to tune seal force and compression
• Specify cure system and steam-cycle requirements for hot-water or steam service
• EPDM material family selected for weather and ozone resistance; confirm exposure requirements
• Specify low-temperature sealing and enclosure closure-force requirements
• Specify a molded O-ring or a joined cord loop; joint requirements must be agreed separately

Applications
Water-treatment equipment, HVAC assemblies and outdoor enclosure seals. Steam valves require a steam-qualified compound. For door or hatch applications, confirm that an O-ring groove or specified cord-loop design is used; provide the mating dimensions and required closure force.

FAQ

Q: What does the 50-80 Shore A range mean for my seal?
A: Specify the required nominal hardness and tolerance. Softer and harder compounds give different compression forces, but hardness alone does not establish pressure capability. Review groove fill, squeeze, extrusion clearance and the mating surfaces together.

Q: Can EPDM handle steam?
A: Steam service requires a suitable EPDM compound and cure system. Provide steam pressure, temperature, saturated or superheated conditions, exposure duration and heating cycles. Confirm the required qualification before specifying a service rating.

Q: What temperature range can it take?
A: Temperature limits depend on the compound, fluid and exposure duration. Specify the minimum start-up temperature, normal operating temperature and short-term peaks, and review the selected compound data against those conditions.

Q: Is it good for outdoor and ozone exposure?
A: EPDM is commonly selected for weather and ozone exposure. Provide outdoor temperature cycles, sunlight exposure and cleaning chemicals, and specify any required weathering tests. Installation squeeze and enclosure geometry also affect sealing.

Q: Can EPDM be used with oil or fuel?
A: No. EPDM is not compatible with petroleum oils, fuel, or most hydrocarbons. For oily or fuel-exposed service use NBR or FKM instead.