High Elastic EPDM O Ring, Various Rubber Material O-Rings FKM NBR VMQ HNBR, Anti-Aging Corrosion Resistant Seals for Plumbing & HVAC Equipment

EPDM O-rings are high-performance rubber sealing rings manufactured from ethylene propylene diene monomer. They are engineered for outstanding resistance to ozone, weathering, aging, hot water, and steam, making them a preferred sealing solution for outdoor and aqueous working environments.

Our premium EPDM O-rings maintain stable elasticity and sealing performance across a temperature range of -40°C to +150°C. They offer good resistance to dilute acids, alkalis, and polar chemicals, with low compression set to prevent permanent deformation under long-term compression. EPDM provides excellent waterproof performance but is not suitable for mineral oil, fuel, or non-polar solvent applications.

We supply EPDM O-rings in a full range of standard sizes. Custom sizes, hardness levels, and colors are available upon request. In addition to EPDM, we also provide other rubber O-rings including FKM, VMQ, NBR, and HNBR to meet diverse working condition requirements.

EPDM O-rings are widely used in water treatment systems, HVAC equipment, plumbing pipelines, automotive cooling systems, solar installations, household appliances, chemical pumps, and outdoor industrial machinery. They are ideal sealing components for water, steam, and outdoor exposure scenarios.

Our EPDM O-rings comply with industrial quality standards. OEM & ODM orders are welcome. We support fast sampling and stable mass supply for global bulk buyers.

EPDM O-rings are widely selected for sealing applications exposed to water, steam, weather, and ozone. They are commonly used in water treatment systems, water pumps, plumbing pipes, and valves for reliable waterproof sealing. In HVAC and heating equipment, these EPDM seals perform well under hot water and steam conditions. They are also used in automotive cooling systems, radiators, and coolant circuits. For outdoor equipment such as solar systems and outdoor machinery, EPDM O-rings resist sunlight, ozone, and weather aging. They fit household appliances, sanitary fittings, and chemical equipment handling dilute acids and alkalis.

Typical industries include water & wastewater, HVAC, automotive, solar energy, plumbing, general industrial machinery, and consumer appliances.

For color, we can manufacture according to customer requirements. Below is a table of the colorful O-rings we have produced. If you need colored O-rings, please provide your Pantone number.

We can also produce Automotive Rubber Seals, Connector Rubber Seals, Power Tool Rubber Seals, Valve Rubber Seals, Pipe Rubber Seals, Semiconductor Rubber Seals, Hydraulic Pneumatic Rubber Seals, Pump Rubber Seals, Oil and Gas Seals, Food Grade Rubber Seals, Medical Rubber Seals, Chemical Equipment Rubber Seals, and more.

• Since 2006, focused on rubber seals, especially for auto parts.
• Certificates: ISO9001, IATF16949, ISO14001, ISO45001, ISO 13485.
• Two factories, more than 18,000², clean room 600², with 300 workers.
• Molds > 10,000 sets, especially O-rings, about 5,000 sets.
• O-ring series covers American standard (AS568), Japanese standard (JIS), national standard (GB), and produces a large number of customized non-standard parts.
• Material: NBR, FKM, SIL, EPDM, CR, NR, PU, HNBR, FFKM, SBR. The rubber materials used meet the requirements of ROHS2.0 and REACH235.
• Material Certificates: FDA, ROHS, REACH, UL157, CP65, WRC, EN549, EN45545.
• Products are widely used in automotive parts, electronic connectors, valves, pneumatics, power tools, new energy, medical equipment, electronic products, and other fields.
• Company has introduced HRP, ERP, and other systems since its inception.
• The company’s labor cost, raw material procurement, production process, and product quality are comprehensively and scientifically controlled.

Ruichen has cooperated with many superior customers. We have a complete system and excellent productivity to serve you.

We provide rubber manufacturing technology consultation and product R&D (OEM & ODM).

• Competitive mold fee.
• Rubber molding for various sizes and shapes — custom fabrication possible.
• Custom personalized logo accepted.
• Over 10,000 types of custom molded rubber established and refined.
• Various materials: Silicone, EPDM, NBR, FKM (Viton), HNBR, NR, Neoprene (CR), SBR, MPU, etc.
• Different hardness: 30 to 90 Shore A.
• Various colors: translucent, black, white, blue, green, red, etc.

Many big companies select Ruichen for their rubber seals and customized rubber parts because we consistently satisfy them in quality, price, delivery, and service. At the same time, we also attach great importance to small customers in niche markets. Whether your purchase quantity is big or small, you are our valuable partner.

We continue to manufacture high-quality products for all customers and pursue 100% customer satisfaction, which has become one of our core competencies.

We have rich experience in materials, products, and production, along with excellent international trade and language communication skills.

From quoting, sampling, production, and shipping to after-sales, our sales team will provide you with the best service so that you can rest assured completely.

Over 10,000 projects have been sent to our customers worldwide in recent years, and we have received countless positive comments.

Our customers can obtain maximum profits through the ISO management system and intelligent manufacturing to reduce our costs continuously.

Our in-house facilities allow us to get your projects done fast. And thanks to our strong relationship with rapid materials partners, our capacity is not limited.

Unlimited capacity, experienced engineers, and a flexible production system allow us to create your seals and production parts in a short period.

We aim to keep every customer happy with reliable quality, fast turnaround, and excellent services. We want all our new customers to become long-term customers.