Zero Leakage Seal Solutions by Polypac
Zero Leakage Seal Solutions by Polypac
Industry-Leading Zero Leakage Seal Technology
Polypac specializes in Zero Leakage Seal systems designed to eliminate fluid loss in high-pressure and critical hydraulic applications. Combining scientific engineering with decades of sealing know-how, our products ensure consistent, leak-free performance across a wide temperature and pressure range, reducing downtime and maintenance costs.
Material Expertise and Customization
Beginning in 2008 with filled PTFE variants (bronze, carbon, graphite, MoS₂, glass), Polypac now offers O-rings and seals in NBR, FKM, silicone, EPDM and FFKM. Our material science team develops compound formulations optimized for friction, wear resistance and chemical compatibility so every Zero Leakage Seal meets your exact specification.
Advanced Manufacturing & Testing
Our custom rubber ring and O-ring factory spans over 10,000 square meters with 8,000 m² of production space and industry-leading equipment. Polypac employs state-of-the-art molding, machining and inspection tools and conducts rigorous testing protocols to validate Zero Leakage Seal integrity under real-world conditions.
Application-Driven Design
Polypac designs Zero Leakage Seal solutions for hydraulic cylinders, rotary shafts, pumps and valves in sectors such as oil & gas, mobile hydraulics, aerospace and heavy machinery. We provide tailored seals for special working conditions, ensuring compatibility with aggressive media, extreme temperatures and prolonged duty cycles.
Research Partnerships and Quality Assurance
As one of China’s largest seal developers, Polypac maintains long-term collaboration with universities and research institutions to push sealing technology forward. Every Zero Leakage Seal undergoes strict quality control and certification processes to deliver reliable, repeatable sealing performance.
Why Choose Polypac
Choose Polypac for proven Zero Leakage Seal expertise, flexible customization, comprehensive material options and strong R&D support. Contact us today to specify custom seals or request technical consultation—engineered for zero leaks, built for long life.
Zero Leakage Seal Display
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.
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.
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.
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.
Are PTFE seals a good choice for vacuum and cryogenic uses?
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