Is the O-ring seal, EPDM (70 Shore) suitable for outdoor use and resistant to UV, ozone, and weathering?

O-ring seal, EPDM: Yes . EPDM (ethylene propylene diene monomer) with a hardness of 70 Shore is generally suitable for outdoor use and offers good resistance to UV, ozone, and weathering. EPDM is widely used for seals and gaskets exposed to sunlight and ambient atmospheric conditions because its polymer structure resists degradation from ozone and UV radiation better than many other elastomers. Typical properties relevant here: - UV resistance: good . resists cracking and embrittlement from sunlight. - Ozone resistance: good . stable against ozone-induced cracking. - Weathering resistance: good . holds flexibility and sealing performance under temperature cycling, rain, and humidity. Caveats: - EPDM is not suitable for prolonged contact with oils, fuels, aromatic hydrocarbons, or certain solvents . these can swell or degrade it. - Temperature limits typically range roughly from -40Â°C to +120Â°C (service limits depend on formulation). - Actual long-term performance can vary with specific compound formulation, additives, and exposure severity; for critical or specialized outdoor applications, confirm with supplier technical data sheet or testing. Conclusion: For general outdoor sealing where exposure to UV, ozone, and weathering is expected, O-ring seal, EPDM (70 Shore) is an appropriate and commonly recommended choice.

Can O-ring seal, EPDM (70 Shore) be safely used with hot water and steam applications?

O-ring seal, EPDM Format: EPDM (70 Shore) O-rings are generally suitable for hot water and low-pressure steam applications due to good resistance to hot aqueous media and steam up to moderate temperatures (typically up to ~120â150Â°C depending on formulation and exposure time). However, EPDM degrades with prolonged exposure to high-temperature steam, strong oxidizers, and certain oils; its long-term performance depends on temperature, pressure, steam purity, and cycling. For reliable use: verify the specific EPDM compoundâs temperature rating from the manufacturer, ensure operating temperature and pressure remain within those limits, consider reduced service life at the upper temperature range, and perform compatibility testing in the actual service conditions. For high-pressure or high-temperature steam (>150Â°C) select a steam-rated elastomer (e.g., silicone, fluorosilicone, or high-temp fluoroelastomer) or metal seals.

Does O-ring seal, EPDM (70 Shore) resist oils, fuels, and common industrial chemicals?

O-ring seal, EPDM Format: EPDM (ethylene propylene diene monomer) with 70 Shore hardness is widely used for general-purpose seals and exhibits excellent resistance to weathering, ozone, steam, hot water and many polar chemicals. However, EPDM is not recommended for prolonged contact with most oils, fuels and hydrocarbons. Specifically: - Mineral oils and petroleum-based fuels: EPDM shows poor resistance. exposure leads to swelling, softening and loss of mechanical properties. Not suitable for gasoline, diesel, lubricating oils, hydraulic oils. - Synthetic oils and some polar fluids: Certain polar or water-glycol fluids can be tolerated depending on formulation, but compatibility must be checked case-by-case. - Common industrial chemicals: EPDM resists many acids, alkalis, detergents and alcohols reasonably well, but strong solvents, ketones (e.g., acetone), aromatic hydrocarbons (e.g., toluene, xylene) and chlorinated solvents will degrade it. - Oils used at elevated temperature: Heat accelerates attack; even marginally compatible fluids can cause rapid deterioration when hot. Recommendation: For applications involving oils, fuels or general hydrocarbons choose a hydrocarbon-resistant polymer (e.g., NBR/Nitrile, HNBR, FKM/Viton) instead of O-ring seal, EPDM Format. If exposure is limited, short-term or involves specific fluids, perform vendor compatibility checks or immersion testing with the exact fluid and operating temperature to confirm suitability.