Chemical Resistant O-Ring Kits — Polypac Sealing Solutions
Chemical Resistant O-Ring Kits — Reliable Sealing Solutions
Industry-leading materials and performance
Polypac Chemical Resistant O-Ring Kits are formulated to withstand aggressive chemicals, high temperatures, and extreme pressure cycles. We supply O-rings in NBR, FKM, silicone, EPDM and FFKM, plus specialty filled PTFE options developed from our early expertise in bronze-, carbon-, graphite- and MoS2-filled PTFE. Each kit is selected to maximize chemical compatibility, compression set resistance and lifecycle performance for hydraulic, petrochemical and process applications.
Custom manufacturing backed by proven expertise
Founded in 2008, Polypac is a scientific and technical hydraulic seal manufacturer with a custom rubber ring and O-ring factory covering more than 10,000 square meters and 8,000 m² of production space. Our production and testing equipment is among the most advanced in the industry. Long-term collaborations with universities and research institutions ensure our Chemical Resistant O-Ring Kits reflect current material science and real-world reliability data.
Advanced testing and quality assurance
Every kit undergoes rigorous testing—chemical compatibility, accelerated aging, hardness, dimensional accuracy and leak testing—so you receive consistent, certified performance. Our in-house lab and QA processes support tailored test protocols for specific media, temperatures and pressure cycles to meet your safety and compliance needs.
Applications and compatibility
These O-Ring Kits are ideal for chemical processing, oil & gas, hydraulic systems, valves, pumps and laboratory equipment. We provide compatibility guidance for acids, solvents, fuels and specialty process fluids, helping you select the optimal material (FFKM for the most aggressive chemistries, FKM/NBR for broader oil resistance, EPDM for polar media).
Why choose Polypac
Polypac combines industrial-scale manufacturing, R&D partnerships and decades of sealing experience to deliver dependable Chemical Resistant O-Ring Kits. Our solutions reduce downtime, extend seal life and simplify inventory management with curated kits for common service environments.
Ordering and technical support
Contact Polypac for custom kits, material cross-reference, rapid prototyping and global fulfillment. Our engineering team provides compatibility charts, sample evaluation and application-specific recommendations to ensure the right seal the first time.
Chemical Resistant O-Ring Kits Display
How important is surface finish on the metal parts that contact the seal?
Extremely important. A rough surface will abrade and wear out the seal quickly, causing leaks. A finish that is too smooth can prevent a lubricating film from forming. A typical recommended surface finish for dynamic applications is 0.2 to 0.8 μm (8-32 μin) Ra.
What is the difference between a static seal and a dynamic seal?
A Static Seal is used between two surfaces that do not move relative to each other (e.g., pipe flanges, end caps). O-rings and gaskets are common static seals. A Dynamic Seal is used between surfaces that do move (e.g., piston and cylinder, rotating shaft). Rod seals, piston seals, and rotary shaft seals are designed for this purpose.
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.
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.
When should I use a spring-energized seal instead of a standard elastomeric seal?
Consider a spring-energized seal (e.g., GSF, SPN types) for demanding applications involving: Extreme Temperatures (below -30°C or above +200°C) Aggressive Chemicals that elastomers can't handle Very Low Leakage or "Zero Leakage" requirements Poor Lubricity or dry running conditions The internal spring maintains constant sealing force, compensating for wear and system variables.
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