Eureka Engineering Design Journal (June 2004)
Improving the design of traditional wound string filters doubles performance and avoids lost bits. Tom Shelley reports.
- Wound string fibres based on a novel continuous fibre process are said to have twice the dirt holding capacity and life of conventional wound string filters and half the pressure drop.
- The favoured media is either no or low contaminant polypropylene but cartridges made of polyester or cotton are also available.
- Use of continuous fibre avoids the shedding of small fibres into the fluid being filtered.
Arab Water World Magazine (May-June 2004)
Hart’s E&P (August 2003)
Alloys and new applications of existing hard goods make better work possible.
Filtration News (July/August 2002)
String-wound cartridges are among the most commonly used filtration media for reducing sediments and other suspended impurities in liquids and water. Traditionally these cartridges are made from ‘roving’ or ‘friction-spun’ yarn and factors such as media migration and chemical leaching were among the major drawbacks. With a new innovative development in the polypropylene filter media for making string-wound cartridges, problems such as media migration and chemical leaching have been eliminated. Additionally new winding technology combined with the random structure of the new media has further improved the cartridge’s effectiveness.
Filtration+Separation (March 2002)
According to Syntech Fibres (Pvt) Ltd, Pakistan, its new yarn is the most significant innovation in string wound cartridge filter media since the development of friction spun polypropylene yarn over a decade ago. Hamid Omar explains.
Engineering Horizons (January 2002)
String wound filter cartridges are the most commonly used filtration media for reducing contamination in water and other liquids. Filtration applications include reverse osmosis and water softening prefiltration, boiler feed water for steam generation, cooling towers and heat exchangers, bottled water, edible oils, oil and gas production, process water for textiles, electroplating and anodizing solutions, as well as in the beverage, pharmaceutical and chemical industries. Standard cartridges are made from ‘roving’ or ‘friction spun’ yarn and factors such as media migration and chemical leaching were amongst the major drawbacks to the cartridges effectiveness. With a new innovative development in the filter media for making string wound cartridges, problems such as media migration and chemical leaching have been eliminated.
Water Conditioning and Purification (August 2001)
Summary: In the last 65 years, string-wound filter cartridges have made vast improvements in regard to reducing contaminants and chemicals in various water supplies. Early factors such as media migration and chemical leaching provided major roadblocks to cartridges’ effectiveness. A new development discussed here, but not yet on the market, looks to rectify those issues.
Cooling towers and heat exchangers are used in the processes and cooling of machines in many industries and in the air conditioning of buildings etc. They are designed and made in several types and numerous sizes, water and atmospheric air being the common media of heat exchange in all of them. It is essential to maintain the water quality, which is highly effected by the atmospheric air, for the efficient operation of the cooling towers, heat exchangers, and other downstream equipments.
Some key words and phrases that are generally associated with filtration.