Rod Seal Custom Sizes | Polypac Hydraulic Seals
Rod Seal Custom Sizes — Precision Sealing by Polypac
High-Performance Rod Seals Designed for Your Needs
Polypac specializes in rod seal custom sizes to meet exact hydraulic specifications. Our rod seals ensure low friction, high wear resistance, and reliable sealing under dynamic conditions, extending cylinder life and improving system efficiency for industrial, mobile, and offshore applications.
Materials Expertise and Wide Compatibility
Starting with filled PTFE variants, Polypac now provides rod seals in bronze-filled PTFE, carbon-filled PTFE, graphite PTFE, MoS₂-filled PTFE, glass-filled PTFE, and elastomers including NBR, FKM, silicone, EPDM, and FFKM. This material range allows optimal compatibility with fluids, temperatures, and pressures specific to each project.
Custom Sizes and Precision Manufacturing
Our custom sizing capabilities cover unique diameters, cross-sections, and tolerances for specialized cylinders. With a 10,000+ m² facility and 8,000 m² factory floor equipped with advanced production and testing equipment, Polypac delivers consistent, repeatable rod seal custom sizes at scale.
Advanced Testing and R&D Collaboration
As one of China’s leading seal developers, we maintain long-term collaborations with universities and research institutions. Rigorous testing—wear, extrusion, thermal aging, and fluid compatibility—ensures each rod seal meets performance targets in real-world conditions.
Applications and Industry Solutions
Our rod seals serve hydraulics across construction machinery, agriculture, marine, aerospace ground support, and industrial automation. Polypac tailors solutions for extreme temperatures, high speeds, and aggressive media to maximize uptime and reduce maintenance costs.
Why Choose Polypac?
Founded in 2008, Polypac combines decades of seal expertise, large-scale manufacturing, and material science innovation. We offer fast prototyping, small-to-large volume production, and responsive technical support for sealing challenges of any complexity.
Get a Quote
Contact Polypac today for expert consultation, material recommendations, and a quote for rod seal custom sizes tailored to your application. Partner with a trusted supplier for reliable, long-lasting sealing performance.
rod seal custom sizes 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.
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.
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.
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.
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