Viton-based seals live longer
A
Serco Ryan product story
Edited by the Engineeringtalk editorial team
Dec 12, 2003
A new range of seals match the demands of modern machines by offering higher resistance to acids, lubricants and wear.
Serco Ryan's new range of seals match the demands of modern machines by offering higher resistance to acids, lubricants and wear.
Ideal for OEMs who are looking for a cost effective and high performance alternative to traditional Nitrile seals, the new Viton based designs offer a longer life within an extended working temperature range.
Available off the shelf in over 200 metric sizes, the range has models that operate with shafts speeds in excess of 6000rev/min and types that operate with pressures over 10bar.
Nitrile based seals have been traditionally used as a cost-effective solution for sealing mineral oil and grease based systems where shafts operate at low speeds and therefore low temperatures.
With the constant demand for longer life and higher operating speeds from the next generation of machinery, the use of new synthetic lubricants has increased, resulting in a shift away from Nitrile based materials in preference for higher performance sealing designs using Viton lip elements.
Viton offers excellent resistance to both mineral oils and advanced synthetic types such as high-alloyed hypoid oil, providing longer operating life and reduced chance of machine failure.
Traditional Nitrile based seals typically have an operating temperate range of up to 160C, whereas Viton maintains its sealing performance in applications where temperatures reach 200C and shaft speeds exceed 6000rev/min.
For these reasons, Serco Ryan now offers the largest range of Viton based rotary shaft seals in the UK, all available off the shelf to ensure minimal lead times.
The range includes over 200 metric sizes in six basic types including seals with rubber covered metal inserts for speedy installation, types with dust lips for extra protection from contaminants and models with reinforcing caps to withstand pressures of over 10bar.
Stock designs are available to fit bore sizes from 10 to 500mm and with garter springs manufactured from either harmonic spring steel or stainless for more demanding applications.
For specialist applications, Serco Ryan offers a large selection of nonstandard seals with short turn around times, an added benefit from sourcing components within Europe.
The facility allows manufacturers total flexibility of design in terms of shaft and housing sizes as well as optional seal designs.
Variations include twin lip types with two garter springs for extra protection; other designs include right rotation, left rotation and bidirectional hydrodynamic lips.
The hydrodynamic design produces a spiralling effect for recycling the lubricant from the lip back into the system, therefore minimising the risk of leakage and contamination.
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