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GSI Seals — Advanced Hydraulic & Oil Seals by Polypac

GSI Seals — Precision Sealing Solutions from Polypac

Industry-Leading Manufacturing and Materials

GSI Seals from Polypac combine decades of sealing expertise with modern production: our filled PTFE formulations (bronze, carbon, graphite, MoS2, glass) and elastomers (NBR, FKM, silicone, EPDM, FFKM) are manufactured in a 10,000+ m2 facility. GSI Seals are engineered for durability, low friction, and chemical compatibility across hydraulic and oil seal applications.

Custom Sealing Designed for Harsh Conditions

When standard parts fail, GSI Seals provide custom solutions. Polypac specializes in bespoke O-rings, rubber rings, and PTFE components tailored to temperature extremes, abrasive media, high pressure, and dynamic motion. Our R&D collaborations with universities ensure your GSI Seals meet specific performance targets.

Advanced Production and Quality Assurance

Every GSI Seal undergoes rigorous testing on advanced production and inspection equipment. Polypac enforces strict quality control — dimensional checks, material verification, and performance testing — to guarantee reliable sealing life in critical hydraulic systems and oil-retaining assemblies.

Wide Application Range

GSI Seals serve industries including hydraulic equipment, automotive systems, industrial machinery, petrochemical plants, and aerospace. Polypac’s seals perform reliably in rotating shafts, pistons, valves, and static face seals, delivering leak prevention and extended maintenance intervals.

Why Choose Polypac GSI Seals

Polypac stands out as a trusted GSI Seals manufacturer thanks to our material science expertise, large-scale custom production capacity, and collaborative product development. From prototype to volume production, we offer competitive lead times and technical support to optimize sealing performance and total cost of ownership.

Get Started with Polypac

Contact Polypac to evaluate GSI Seals for your application. Whether you require filled PTFE components or specialized elastomer O-rings, our team will recommend materials and geometries to meet pressure, temperature, and chemical compatibility demands—delivering robust seals that keep systems running.

GSI Seals 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.

How do I choose the right material for my sealing application?

Material selection depends on four key factors: Media: What fluid or gas will the seal contact? (e.g., petroleum oil, water, chemicals, steam) Temperature: What is the minimum and maximum operating temperature? Pressure: What is the system's operating pressure? Are there pressure spikes? Application: Is it a static, dynamic, or rotary seal? Example: NBR (Buna-N) is excellent for standard hydraulic oil, while FKM (Viton®) is needed for high temperatures or aggressive chemicals.

What is the difference between NBR and FKM materials?

NBR (Nitrile/Buna-N): A general-purpose, cost-effective material with excellent resistance to petroleum-based oils and fuels. It has a standard temperature range of -30°C to +100°C (-22°F to +212°F). FKM (Fluoroelastomer/Viton®): A premium material with excellent resistance to high temperatures (up to 200°C+), chemicals, and oils. It is used in more severe environments but is more expensive than NBR.

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.

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.

Table of Contents

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GSI Seals — Precision Sealing Solutions from Polypac
Industry-Leading Manufacturing and Materials
Custom Sealing Designed for Harsh Conditions
Advanced Production and Quality Assurance
Wide Application Range
Why Choose Polypac GSI Seals
Get Started with Polypac
GSI Seals Display

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