Metric O-Rings(seals ring) are employed in specialized applications and, like the name suggests, are standardized by metric dimensions. With a wide variety of sizes available, Metric O-Rings fill in the gaps left by the standardized AS568 o-ring chart. Metric O Ring sizing is determined by the o-ring's inside diameter and cross section width.
Polyurethane is also known as urethane, cast urethan and millable urethane. Exceptional tensile strength. Abrasion and low temperature resistance. Typical applications include hydraulic seals, gaskets, diaphragms, hoses, and wheels for skate boards.
Polyurethane O-Rings Temperature Range: The temperature ranges presented above are approximations for dry air service only and should not be used to determine design specifications or end-use temperature limits. Actual temperature range of a compound in an end-use application is highly dependent on part type, hardware configuration, applied forces, chemical media, pressure and thermal cycling effects, and other factors. The most practical way of determining an end-use temperature range is testing in the actual application conditions. Consult a Marco Engineer for more details.
Common Names: Urethane, AU, EU, PU
Polyurethane Rubber O Ring Features: Good hydraulic oil and gasoline resistance Resistant to pure aliphatic hydrocarbons (propane, butane, fuel) Resistance to mineral and silicone oils and greases Resistant to water, oxygen, ozone and aging Excellent tear and abrasion resistance Available in multiple types and compounds to meet performance and cost requirements Polyurethane Rubber O-Rings Limitations: Not compatible with acids, ketones, esters, ethers, alcohols, glycols Hot water, steam, alkalis and amines