EPDM Rubber O Ring, Ethylene Propylene O-Ring Seal, NBR Silicone FKM HNBR Optional, Ozone & Steam Resistant for Water Valve and HVAC Sealing

Our EPDM rubber O-rings are precision-molded sealing components manufactured from high-quality ethylene propylene diene monomer (EPDM) rubber. Designed for demanding sealing applications, these O-rings deliver exceptional resistance to ozone, UV radiation, and weather aging, making them ideal for long-term outdoor service. They perform reliably in hot water and steam environments and offer good tolerance to dilute acids and alkalis. With low compression set and stable elasticity, they provide consistent, leak-proof sealing in water valves, HVAC systems, and a wide range of industrial equipment.
In addition to EPDM, we supply O-rings in NBR, Silicone, FKM, and HNBR to meet diverse working condition requirements. Standard AS568 sizes are available from stock, and custom dimensions, hardness, and colors are accepted. All products are RoHS compliant and suitable for sanitary and potable water sealing applications.

• Premium EPDM rubber compound with excellent resistance to ozone, UV radiation, and weather aging
• Outstanding hot water and steam resistance — stable performance in humid environments
• Good tolerance to dilute acids, alkalis, and polar chemical media
• Low compression set ensures reliable leak-proof sealing after long-term compression
• High elasticity and flexibility for easy installation in standard AS568 grooves
• Multiple alternative rubber materials available: NBR, Silicone, FKM, and HNBR for different working conditions
• Standard sizes in stock; custom dimensions, hardness, and color accepted
• RoHS compliant — suitable for sanitary and drinking water applications

The following tables present the original properties, heat resistance, compression set, ozone resistance, water resistance, and low-temperature brittleness test results for our standard 70A EPDM O-ring compound.