Activated carbon and

electrostatic fibre combined

filter lmportex of Athens (Georgia, USA) has developed a unique filter media which makes use of two of the latest technological improvements in air filtration, acfivafed carbon and electrostatic fibre. The carbon adsorbs odours from the air while the electrostatic fibre attracts and holds small airborne allergens such as pollens, mould, fungal spores, bacteria, and viruses.

Unlike most carbon activated media, lmportex attaches the carbon without using any adhesive resin. Resin can coat the carbon and retard its adsorption capability. The company has developed a way of applying the carbon to the media and keeping it in place without covering the carbon with a glue-like material.

A much finer ground car- bon is used than that which is found in traditional car- bon activated media. Break- ing the carbon down several generations further allows for a larger surface area of the carbon to be exposed to the airborne irritants and increases its odour adsorption capability. Using a smaller amount of carbon more efficiently pro- vides for better adsorption without the mess typically associated with carbon media.

The media has an inex- pensive price (under $0.40 per square foot), and ASH- RAE rating of 80% arrest- ante 11% avg, dust spot, 0.10 wg initial resistance @ 300 fpm, allowing it to be used either by itself or in conjunction with other med- ia. The media can also be used in carbon air filtration, industrial and commercial settings, antimicrobial com- posites, and air purification systems.

lmportex of Athens, Box 1628, GA 30605, USA. Tel: + 1 706 543 6552, fax: + 1 706 543 6554.

COL

technology for melt blow

filters The Filterite Division of Memtec has launched its Nexis series of advanced melt blown filter cartridges, Incorporating the patent pending COLD (Co-located Large Diameter) fibre technology, the Nexis filter claims to offer precise, repeatable filtration, previously unachievable with conventional technologies. By intermingling COLD fibre with fine filtration fibre, Memtec has created a filter optimised for filtration efficiency with superior strength to resist unloading under dynamic conditions.

Nexis cartridges are available in removal ratings from 0.5 to 200 microns and continuous lengths from 4” to 40”.

Memfec America, Filter- ite Division, 2033 Green- spring Drive, Timonium, MD 21093, USA. Tel: +I 410 252 0800, fax: +I 410 560 2857.

Further U

for Houseman Houseman has appointed Qualichem as manufacturer and distributor for PermaCare RO chemicals in the United States. The company from Roanoke, Virginia, will also provide a support package for Houseman.

The agreement allows Qualichem to manufacture and distribute specialty antiscalants, biocides and membrane cleaners for RO, nanofiltration and ultrafiltration using Houseman formulations marketed under the PermaCare name.

Whilst Qualichem will look after PermaCare inter- ests on the East Coast of the United States, Houseman is looking for a firm for a similar agreement covering the West Coast.

Houseman Limited, The Priory, Burnham, Slough, SL1 7LS, UK. Tel: +44 1628 604488; fax: +44 1628 666381.

rsatile membrane iltration test

facility PCI Membrane Systems Lfd has improved the versatility of their lab-scale membrane filtration pilot plant.

Reverse osmosis (RO), nanofiltration (NF), ultrafiltration (UF) or microfiltration (MF) polymeric membranes are now being fitted. In addition, the option of ceramic membranes is available for UF and MF. Tubular and spiral geometries are offered for all the polymeric types.

Also available are pipe- work options including re- cycle for high recoveries and additional pressure, temperature and flow indi- cators

PCI Membrane Systems Lfd, Laverstoke Miii, Whitchurch, Hampshire, RG28 7NR, UK. Tel: +44 1256 896966, fax: -I-44 1256 893835.

PCI Membrane Systems Ltd, 623 Gracie Avenue, Fond du iac, WI 54935, USA. Tel: + I 414 923 5869, fax: + 1 414 923 5879.

Smallest cut of

Meltog has adapted its STM200 Filter Tube Making machine to enable cut offs down to 32 mm. This allows the production of filter tubes 30% shorter than before.

The STM200 uses a spiral lock seam which resuits in a high strength core with up to 30 bar collapse strength. The machine will work with both plain and pre- perforated material and produce tubes with diameters from 25 to 45 mm.

Meltog Precision Engi- neers, Gelderd Road, Birst- all, West Yorkshire, WF17 9LW, UK. Tel: i-44 1924 422822; fax: -I- 44 1924 422188.