Rod Seal for Hydraulic Cylinder — Polypac High-Performance Solutions
Rod Seal for Hydraulic Cylinder — Polypac High-Performance Solutions
Why Polypac Rod Seals Deliver
Polypac manufactures High Quality rod seal for hydraulic cylinder applications that combine low friction, long service life, and reliable leak prevention. Founded in 2008, our engineering-led approach leverages decades of experience in filled PTFE (bronze, carbon, graphite, MoS₂, glass) and modern elastomers to meet demanding pressure, speed, and temperature requirements. Choose Polypac for proven performance, consistent tolerances, and scalable production.
Material Options and Customization
We offer a wide range of compounds to optimize rod seal for hydraulic cylinder performance: filled PTFE for extreme wear resistance and low friction; NBR and FKM for general-purpose sealing; EPDM and silicone for specific chemical or temperature profiles; and FFKM for aggressive media. Our custom rubber ring and O-ring factory (10,000+ m² with 8,000 m² production space) supports bespoke geometries, compound tuning, and hard-to-source materials for special working conditions.
Industry-Leading Testing and Quality
Polypac’s production and testing equipment rank among the most advanced in the seal industry. Each rod seal for hydraulic cylinder undergoes dimensional inspection, material verification, and functional testing under simulated pressure and speed cycles to ensure consistent sealing performance. Our long-term collaborations with universities and research institutes enable continuous material and design improvements.
Applications and Typical Benefits
Rod seals from Polypac are ideal for construction equipment, mobile hydraulics, agricultural machinery, industrial presses, and marine systems. Benefits include reduced leakage, extended maintenance intervals, lower energy consumption through reduced friction, and improved uptime in harsh environments.
Ordering, Support and Custom Solutions
Polypac offers fast prototyping, CAD support, and volume production with competitive lead times. Our technical team provides application assessment, material recommendations, and lifecycle optimization to ensure the right rod seal for hydraulic cylinder performance. Contact Polypac for customized sealing solutions and full technical support.
rod seal for hydraulic cylinder 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 purpose of the metal spring in a rotary shaft seal?
The garter spring in a shaft seal (e.g., FSKR, SPGO types) provides a constant radial force on the sealing lip. This ensures consistent contact with the rotating shaft, compensating for minor wear, eccentricity, and vibration to prevent lubricant leakage.
Why did my O-ring fail prematurely?
Common causes of O-ring failure include: Chemical Incompatibility: Swelling, softening, or cracking due to fluid exposure. Improper Sizing: Using an incorrect size leads to over-compression or inadequate sealing force. Abrasion: Wear and tear from rough surface finishes or contaminated fluid. Extrusion: The seal is forced into the gap between metal parts under high pressure. Installation Damage: Nicks, cuts, or twists during assembly.
Are PTFE seals a good choice for vacuum and cryogenic uses?
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