Polypac Food-grade O-rings — FDA Silicone Sealing Solutions

Food-grade O-rings — FDA Silicone Solutions by Polypac

Polypac is a scientific and technical hydraulic seal manufacturer and oil seal supplier delivering High Quality Food-grade O-rings built for hygienic, safe production. Our FDA silicone O-rings combine excellent temperature stability, biocompatibility and chemical resistance to meet strict food and beverage industry standards while ensuring reliable long-term sealing performance.

Why Choose Polypac Food-grade O-rings

Choose Polypac for decades of sealing expertise, advanced production lines and close collaboration with research institutions. Our Food-grade O-rings FDA silicone options provide low extractables, odorless operation and compliance-ready documentation, making them ideal for direct and indirect food contact applications.

Materials & Compliance

We manufacture O-rings in FDA silicone, NBR, FKM, EPDM and FFKM to suit diverse process conditions. Our FDA silicone compounds are formulated for food contact compliance, offering excellent cold-flexibility, steam resistance and clean-room compatibility for sensitive processing environments.

Custom Manufacturing & Capacity

Polypac's custom rubber ring and O-ring factory spans more than 10,000 m² with 8,000 m² of production space and industry-leading equipment. We provide tailored sizes, durometers and compound formulations to meet specific operating pressures, temperatures and regulatory requirements.

Applications & Performance

Ideal for dairy, beverage, bakery, meat processing and pharmaceutical lines, our Food-grade O-rings FDA silicone deliver stable sealing under thermal cycling, CIP/SIP cleaning and aggressive washdowns. Designed for longevity, they reduce downtime and maintenance costs.

Quality Assurance & Testing

Every batch undergoes rigorous testing in our in-house labs—dimensional checks, compression set, tensile strength and extractables analysis. As one of China's leading seal developers, Polypac maintains strict QA protocols and comprehensive documentation for audits and certifications.

Order, Support & Technical Service

From prototype to high-volume production, our technical team provides material selection guidance, rapid tooling and responsive after-sales support. Contact Polypac to specify FDA silicone Food-grade O-rings and get a sealing solution engineered for safety and performance.

Food-grade O-rings FDA silicone Display

FAQ:
Why did my O-ring fail prematurely?

Common causes of O-ring failure include: Chemical Incompatibility: Swelling, softening, or cracking due to fluid exposure. Improper Sizing: Using an incorrect size leads to over-compression or inadequate sealing force. Abrasion: Wear and tear from rough surface finishes or contaminated fluid. Extrusion: The seal is forced into the gap between metal parts under high pressure. Installation Damage: Nicks, cuts, or twists during assembly.

Can I reuse a seal?

We strongly recommend never reusing seals. Once compressed and used, a seal takes a "set" and its elastic properties are degraded. Reusing it almost always results in a leak. Always install a new seal during any maintenance or repair.

How can I prevent seal damage during installation?

Use Tools: Always use dedicated installation tools (e.g., picks, cones, guides). Lubricate: Always lubricate the seal and the contact surface. Protect Sharp Edges: Cover sharp threads and edges with tape or use an installation sleeve. Check the Groove: Ensure the installation groove is clean, deburred, and undamaged.

What does "AS568" mean?

AS568 is the Aerospace Standard that defines the dimensions for over 360 standard O-ring sizes. It is the most widely accepted sizing system in North America and globally. An AS568 number (e.g., AS568-214) specifies a precise inside diameter and cross-section.

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