OSN rod seals are designed to prevent hydraulic fluid leaking out of the cylinder, guaranteeing reliable sealing even under severe conditions of pressure, speed and temperature. Our range includes compact profiles, low-friction seals, fabric-reinforced solutions, heavy-duty hydraulic sets and specific designs for high-pressure, long-life applications.
Their geometry is optimised exclusively to prevent outward leakage, control the oil film better and withstand the loads generated by rod movement. Many specific profiles also feature asymmetrical lips, textile reinforcement, anti-extrusion rings or low-friction designs that improve sealing, reduce tearing and extend the service life of the system. Symmetrical seals remain an excellent solution when the aim is to simplify stock and use a single reference for both piston and rod but, for the same material and working conditions, a seal designed specifically for the rod normally delivers better performance in that role.
We supply solutions for industrial machinery, mobile hydraulics, civil works, lifting platforms, agricultural machinery, telescopic cylinders, presses and heavy-duty equipment. The different profiles make it possible to optimise sealing, reduce rod wear and minimise friction during movement.
The OSN rod seal range includes solutions for light, medium and heavy-duty hydraulic applications, from compact single-acting profiles to reinforced sealing sets for high pressures. We offer designs in high wear-resistance polyurethane, fabric-reinforced seals for severe loads, secondary seals that improve overall system performance, buffer seals that absorb pressure peaks, and profiles optimised to reduce friction and eliminate stick-slip. The range also includes specific solutions for mobile hydraulics, industrial cylinders, telescopic cylinders and equipment subject to vibration or heavy working loads.
Alongside conventional elastomeric profiles, OSN offers low-friction rod seals consisting of a PTFE ring energised by an o-ring, particularly suited to applications requiring smooth movement, high sliding speeds and excellent energy efficiency. The availability of materials such as PU, NBR, PTFE, TPE, POM and reinforced compounds makes it possible to match every solution to the pressure, temperature, speed, chemical compatibility and service life required by the application.
Our rod seals are available in a variety of materials to suit any working condition. Polyurethane (PU) offers excellent resistance to wear, abrasion and extrusion, making it one of the most widely used options in dynamic applications. NBR (nitrile rubber) stands out for its compatibility with hydraulic oils and its excellent cost-performance ratio. For high-performance applications PTFE is also available, characterised by its very low coefficient of friction and high chemical resistance. We also offer solutions in TPE, POM and materials reinforced with technical fabric, which provide greater mechanical strength and dimensional stability in high-load, high-pressure applications. Consult our guide to choosing the most suitable rubber for the application and working conditions.
Every hydraulic or pneumatic system has specific requirements in terms of pressure, speed, temperature, fluid and service conditions. Our technical team will help you select the most suitable rod seal for your application, recommending the optimum profile, material and configuration to maximise cylinder life and improve system reliability. Contact us for technical information, dimensions, equivalents and made-to-measure solutions with no obligation.
