Rod Seals for Heavy Machinery – Polypac High-Performance Solutions
Rod Seals for Heavy Machinery
High-performance rod seals built for rugged duty
Polypac's Rod seals for heavy machinery are engineered to meet the extreme demands of construction, mining, and agricultural equipment. Designed for hydraulic cylinders operating under high pressure, contamination and shock loads, our rod seals combine low friction, outstanding wear resistance and reliable sealing life to reduce downtime and total cost of ownership.
Materials and customization options
We offer a broad material portfolio including filled PTFE (bronze, carbon, graphite, MoS₂, glass), NBR, FKM, EPDM, silicone and FFKM. Polypac customizes profiles, lip geometries and compound formulations to suit temperature ranges, media compatibility and surface finishes—ensuring each Rod seal for heavy machinery is matched to the application for optimal performance.
Engineering, production and testing excellence
Founded in 2008, Polypac operates an advanced 10,000+ m² facility with industry-leading production and testing equipment. Our R&D collaborations with universities and research institutes enable accelerated material development and validation. All Rod seals for heavy machinery undergo strict dimensional, dynamic and endurance testing to certify pressure, abrasion and leak-tight performance before shipment.
Applications and measurable benefits
Typical applications include excavator and loader booms, hydraulic cylinders on cranes, forestry equipment and industrial presses. Choosing Polypac Rod seals for heavy machinery delivers clear benefits: extended service intervals, lower frictional energy loss, improved contamination resistance and predictable performance across fluctuating loads and temperatures.
Why choose Polypac
As a scientific and technical seal manufacturer and oil seal supplier, Polypac provides turnkey sealing solutions—from material selection and prototyping to production and on-site support. Our fast customization, consistent quality control and global supply capacity make Polypac the preferred partner for OEMs and service providers seeking dependable Rod seals for heavy machinery. Contact us for samples, technical drawings and application engineering support.
Rod seals for heavy machinery Display
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 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.
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.
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