Product category:
Seals, gaskets, bushes, etc
News Release from: Serco Ryan | Subject: Dichta Rotary Shaft Seals
Edited by the Manufacturingtalk Editorial
Team on 12 December 2003
Rotary shaft Viton seals offer higher
performance
Rotary shaft seals using Viton material provide a higher performance alternative to traditional Nitrile seals which tend to fail prematurely when exposed to modern synthetic oils.
Serco Ryan's new range of Rotary Shaft Seals from Dichta have been introduced to provide a higher performance alternative to traditional Nitrile seals which tend to fail prematurely when exposed to modern synthetic oils The new Viton based designs also offer a longer service life at higher temperatures and an increased speed capacity of up to 6,000 rpm
This article was originally published on Manufacturingtalk on 5 Jun 2002 at 8.00am (UK)
Related stories
Fasteners guide includes finishes and properties
A comprehensive new guide listing all European makes and sizes of fasteners and fixing solutions, including handy metric conversion tables, is now available.
Fixing solutions distributorship set up
Serco Ryan has become a distribution partner for the world leading Fischer range of high quality fixing solutions.
Six models are available, providing varying degrees of pressure capacity, dust protection and resistance to misalignment.
The standard size range will accommodate shaft diameters from 10 - 500mm with most sizes held in stock.
Constant demand for longer life and higher operating speeds from machinery has led to the widespread use of synthetic lubricants, this is causing a serious problem with existing Nitrile seals, as synthetic oils weaken the material structure of Nitrile based products.
Further reading
Agreement extends distributorship of cutting tools
Extensive stocks of 700 different types of high-quality Dormer jobber drills, reamers, taps and cutters are available through a network of 40 dealers.
Fastening solution reduces assembly time and parts
An efficient fastening solution for one of the world's largest motor manufacturer's latest line in control gear has significantly cut assembly time and number of components required.
Viton seals offer higher resistance to lubricants
Offering higher resistance to acids, lubricants and wear, a range of Viton seals offers a cost effective and high performance alternative to traditional Nitrile seals.
The result is a premature seal failure that can cause extended down time due to leaks, product contamination and lost production.
Nitrile seals are still being used in preference to higher performance sealing designs, using Viton lip elements, because of their comparatively low initial cost.
The cost implications of a seal failure though, far outweigh the cost of a better quality seal, making this practice a real false economy and underlining the reason for Serco Ryan's introduction of their new range of high quality Viton based rotary shaft seals.
Viton offers excellent resistance to both mineral oils and advanced synthetic types such as high-alloyed hypoid oil, also to ozone and weathering, providing longer operating life and a reduced chance of machine failure.
Traditional Nitrile based seals typically have an operating temperate range of up to 160degC whilst Viton maintains sealing performance in applications where temperatures reach 200degC and shaft speeds exceed 6,000rpm.
The new Dichta 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 off the shelf to fit bore sizes from 10 - 500mm and with garter springs manufactured from either harmonic spring steel or stainless steel for more demanding applications.
For specialist applications, Serco Ryan also offer a large selection of non-standard seals with short lead times, an added benefit from sourcing components from within Europe.
This 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, designs that offer right rotation, left rotation and bi-directional 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.
Serco Ryan currently also stock around 80,000 separate product lines and their impartial technical advice is available to all customers and includes engineered sealing and fastening solutions as well as manufacturing cost reduction studies.
Large stocks guarantee supply availability and a strict policy of only supplying quality products ensure that Serco Ryan customers always have their expectations fulfilled.
• Serco Ryan: contact details and other news
• Email this article to a colleague
• Register for the free Manufacturingtalk email newsletter
• Manufacturingtalk Home Page
Search the Pro-Talk network of sites
