Piston rod seal for hydraulic cylinders – Polypac Sealing Solutions
Piston rod seal for hydraulic cylinders — reliable sealing from Polypac
Key features
Polypac's piston rod seal for hydraulic cylinders combines tight leakage control, low friction and long service life. Designed for dynamic rod sealing under high pressure, side loads and contamination, our seals reduce downtime and improve system efficiency across mobile and industrial hydraulics.
Advanced materials and constructions
We manufacture seals in filled PTFE variants (bronze, carbon, graphite, MoS2, glass) and elastomers including NBR, FKM, silicone, EPDM and FFKM. Tailored compound selection and multi-lip geometries optimize wear resistance, chemical compatibility and temperature stability to meet specific fluid and environmental demands.
Customization and precision manufacturing
With a 10,000+ m² facility and 8,000 m² of factory space, Polypac offers bespoke piston rod seal for hydraulic cylinders and custom O-rings. From prototyping to large-volume production, our advanced equipment and collaborations with universities enable rapid development for special working conditions and nonstandard dimensions.
Performance testing and quality assurance
Polypac applies rigorous testing—pressure, friction, wear and leakage checks—ensuring each piston rod seal for hydraulic cylinders meets industry durability standards. Our in-house QC and material R&D deliver consistent performance in salt spray, high-temperature, and contamination-prone environments.
Applications and benefits
Ideal for excavators, hydraulic presses, marine and offshore cylinders, agricultural machinery and industrial actuators, our seals minimize maintenance, extend service intervals and enable smoother rod motion. Customers benefit from improved energy efficiency and reduced total cost of ownership.
Why choose Polypac
Founded in 2008, Polypac is a scientific and technical hydraulic seal manufacturer and oil seal supplier specializing in seal production, sealing material development, and customized sealing solutions. As one of China’s leading seal developers, we combine advanced production equipment, academic partnerships and a proven track record in filled PTFE and elastomer O-rings to deliver dependable piston rod seal for hydraulic cylinders. Contact Polypac for consultation, rapid samples and scalable manufacturing solutions.
Piston rod seal for hydraulic cylinders Display
When should I use a spring-energized seal instead of a standard elastomeric seal?
Consider a spring-energized seal (e.g., GSF, SPN types) for demanding applications involving: Extreme Temperatures (below -30°C or above +200°C) Aggressive Chemicals that elastomers can't handle Very Low Leakage or "Zero Leakage" requirements Poor Lubricity or dry running conditions The internal spring maintains constant sealing force, compensating for wear and system variables.
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 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.
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