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Rod Seal Manufacturer - Polypac

Polypac — Your Reliable Rod Seal Manufacturer for Demanding Hydraulic Systems

Precision Manufacturing & Advanced Facilities

As a dedicated rod seal manufacturer, Polypac combines a 10,000+ m² campus and 8,000 m² production space with industry-leading production and testing equipment. Founded in 2008, our factory produces high-performance seals with rigorous quality control to meet the tolerance and lifecycle requirements of modern hydraulic cylinders.

Materials Expertise & Product Range

Polypac began with filled PTFE formulations — bronze, carbon, graphite, MoS₂ and glass-filled PTFE — and has expanded to a full suite of O-ring and rubber ring materials, including NBR, FKM, silicone, EPDM and FFKM. This material breadth enables us to optimize rod seals for friction, wear resistance and chemical compatibility across diverse fluids and temperatures.

Customized Solutions for Special Working Conditions

We design custom rod seals and sealing systems to address dust, high pressure, extreme temperature, and abrasive or corrosive media. Our R&D collaborations with universities and research institutes ensure tailored compound development and innovative seal geometries that improve sealing life and reduce maintenance costs.

Testing, Certification & Quality Assurance

Polypac's advanced testing capabilities simulate real-world cylinder cycles and environmental stresses. Every batch undergoes dimensional inspection, hardness testing and material analysis to deliver consistent performance. As a trusted rod seal manufacturer, we prioritize traceability and customer-specific documentation for regulated and industrial projects.

Applications & Industry Support

Our rod seals serve construction equipment, mobile hydraulics, industrial presses, marine systems and renewable energy actuators. Polypac offers technical support from selection through prototyping and production, ensuring each rod seal meets application requirements for efficiency and service life.

Partner with Polypac

Choose Polypac as your rod seal manufacturer for proven materials expertise, custom engineering and global collaboration. Contact us to discuss sealed component design, material selection and volume supply tailored to your hydraulic application.

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FAQ:

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.

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 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.

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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Polypac — Your Reliable Rod Seal Manufacturer for Demanding Hydraulic Systems
Precision Manufacturing & Advanced Facilities
Materials Expertise & Product Range
Customized Solutions for Special Working Conditions
Testing, Certification & Quality Assurance
Applications & Industry Support
Partner with Polypac
rod seal manufacturer Display

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