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Bearing protection from air-borne contaminants
General news -effective means of upgrading existing plant to meet new legislation. Contact: Foxboro-Eckhardt, The Courtyards, Hatters Lane, Watford, Hertfordshire WDl 8YH, UK.
Tel: + 44 1923 238445; Fax: + 44 1923 816609.
Bearing protection from air-borne contaminants John Crane has introduced the “bearing Mate”, a compact, one-piece unitised design that protects bearings from air borne contaminants, water and other outside pollutants thereby preventing oil contamination and consequently bearing failure and downtime. Designed to replace conventional lip seals and labyrinths, it offers zero ingress due to a special antiintrusion shield manufactured from carbon ftied FTFE in a 316 stainless steel housing with a molybdenum/bronze filled PTFE stator. With no metal-to-metal contact, its non-sparking design reduces the risk of damage due to incorrect fitting. Contact: The Marketing Development Group, John Crane UK, Crossbow House, 40 Liverpool Road,
exceed the normal rate achievable with a bellows seal. After spending many years investigating the variety of packings and gland packing designs in sustained-load tests, Eckhardt has established that insufficient wear resistance of the packing material itself is the main problem. The packing wear experienced with a sliding stem was greater than with a rotating stem, the former carrying through as many gas molecules as when traditional packings were used.The special packing material used is made of impregnated and braided FIFE thread, the rough pressed core material having high elasticity and low friction. During the test programme, Eckhardt learnt much about the effects of stem surface quality, the nature of the packing space and the rough pressing method. this knowledge was applied to the new system. In addition to the packing’s elasticity and dimensional stability, an effective system requires a valve stem which has been ground and polished to very fine limits. The sealing system is suitable for non-diffusing media, and is claimed to be more economical, smaller and more robust than a bellows seal, especially when used with curing or crystallising media. It also provides an alternative to a bellows seal in applications where adverse mechanical and physical conditions might impair its service life. It also offers operators a cost
Sealing
Technology
No. 14
Slough SL14QX, UK. Tel: +44 1753 531122; Fax: +44 1753 573677.
NAK accredited to ISO 9002 Mao Shun Oil Seal Industrlal Co Ltd, manufacturer of NAK oils seals, was assessed in December 1994 and became the first oil seal manufacturer in Taiwan to receive IS0 9002 quality assurance certification. 1994 marked some significant steps in the future plans of NAK with the award of IS0 9002 being the last stage in the development of their new factory at the 23 000 m3 site in Nantou, central Taiwan. New product manufacturing process development, including hydraulic seals and gaskets, will start this year. The product range of NAK is already well established with major customer in the industrial and automotive markets. An network of stockists and distributors has been put in place to market the products internationally. Recently, NAX provided specially manufactured hub seals for the 555 Subaru World Rally Team who went
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Tel: + 44 1923 238445; Fax: + 44 1923 816609.
Bearing protection from air-borne contaminants John Crane has introduced the “bearing Mate”, a compact, one-piece unitised design that protects bearings from air borne contaminants, water and other outside pollutants thereby preventing oil contamination and consequently bearing failure and downtime. Designed to replace conventional lip seals and labyrinths, it offers zero ingress due to a special antiintrusion shield manufactured from carbon ftied FTFE in a 316 stainless steel housing with a molybdenum/bronze filled PTFE stator. With no metal-to-metal contact, its non-sparking design reduces the risk of damage due to incorrect fitting. Contact: The Marketing Development Group, John Crane UK, Crossbow House, 40 Liverpool Road,
exceed the normal rate achievable with a bellows seal. After spending many years investigating the variety of packings and gland packing designs in sustained-load tests, Eckhardt has established that insufficient wear resistance of the packing material itself is the main problem. The packing wear experienced with a sliding stem was greater than with a rotating stem, the former carrying through as many gas molecules as when traditional packings were used.The special packing material used is made of impregnated and braided FIFE thread, the rough pressed core material having high elasticity and low friction. During the test programme, Eckhardt learnt much about the effects of stem surface quality, the nature of the packing space and the rough pressing method. this knowledge was applied to the new system. In addition to the packing’s elasticity and dimensional stability, an effective system requires a valve stem which has been ground and polished to very fine limits. The sealing system is suitable for non-diffusing media, and is claimed to be more economical, smaller and more robust than a bellows seal, especially when used with curing or crystallising media. It also provides an alternative to a bellows seal in applications where adverse mechanical and physical conditions might impair its service life. It also offers operators a cost
Sealing
Technology
No. 14
Slough SL14QX, UK. Tel: +44 1753 531122; Fax: +44 1753 573677.
NAK accredited to ISO 9002 Mao Shun Oil Seal Industrlal Co Ltd, manufacturer of NAK oils seals, was assessed in December 1994 and became the first oil seal manufacturer in Taiwan to receive IS0 9002 quality assurance certification. 1994 marked some significant steps in the future plans of NAK with the award of IS0 9002 being the last stage in the development of their new factory at the 23 000 m3 site in Nantou, central Taiwan. New product manufacturing process development, including hydraulic seals and gaskets, will start this year. The product range of NAK is already well established with major customer in the industrial and automotive markets. An network of stockists and distributors has been put in place to market the products internationally. Recently, NAX provided specially manufactured hub seals for the 555 Subaru World Rally Team who went
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