Launching high rated filter cartridges

Cartridge designs maximise filter surface area

Screen design for thinner slurry Building on its Rotoscreen machine, Carrier Pollution Control Ltd of Braintree, UK, has developed a new line of slurry separators.

Flow Distribution Channels

According to the company,

Distribution Netting

economic and environmental factors have greatly increased the demand for more efficient methods of separating liquids and solids in slurry. To satisfy this growing market Carrier is now offering a choice of screen width including a 400 mm and a 1000 mm option and

Fluid separation specialist Cuno Inc, headquartered in Meriden, Connecticut, USA, has added two new cartridges to their range of depth filters. PolyNet T M filter cartridge is comprised of three zones of polypropylene filter media, each with varying flow distribution channels, combined with layers of

a tendency

to

plug

or

shed

where in conventional media this

previously held particles, reducing the life and efficiency of the filter. In contrast, PolyNet maintained a

area is often ineffective for filtration. The reduction of these blind or unusable areas enables the

consistent, high flow rate and

capture of more contaminant at the

greater contaminant retention.

core as well as toward the outer

PolyNet has been designed for a wide range of applications including chemicals, fine chemicals,

edge where the shorter pleats take advantage of the greater space

electronics and fine coatings, as

available says the company. Betafine XL is constructed from

distribution netting. The decreasing

well

industrial

100% polypropylene, with the

size and number of flow channels from one layer to the next is said to create evenly distributed,

applications. According to Cuno, using its Polynet filter existing industrial filter processes will

cartridge components thermally bonded to eliminate the need for

longitudinal and latitudinal flow paths across each successive layer,

require less energy and gain up to four times the dirt holding capacity.

as

general

resins or binder compounds, ensuring a clean filter with low extractables. According to the

enabling the full capacity of the

The other addition to Cuno's

company, 'it is ideally suited for

filter to be used. At the same time a consistent filtration ranging

range of depth filters is the absolute-rated, Betafine XL® filter

process applications that demand thermal and chemical compatibility.

1-70 microns is maintained. The

cartridge that incorporates the

Betatlne XL is available with nine

inner core, which has no flow channels, is the final qualifying

company's Advanced Pleat TechnologyT M (APT), which is said

absolute

section; ensuring absolute rated performance says Cnno.

to significantly increase the filter's effective surface area. The pleat configuration of Betafine XL is coupled with a novel

a choice of screen types. In addition to its existing perforated screen (1.5-2 mm hole diameter) for cattle and thicker pig slurry, it has developed a wedgewire screen for thinner slurries. The wedgewire screen is available in a variety of slot sizes down to 0.4 mm, has its own positive drive mechanism and has the collection hopper for the separated liquids located beneath the drum. On all the new Rotoscreen machines the company has redesigned the two compression rollers that apply the pressure on the screen. The rollers now have a common support that means that the pressure is applied more accurately and more evenly over the

from

screen. In addition, the pressure can

0.2 microns to 70 microns. Contact: Cuno Inc, 400 Research

be kept low, as the screen no longer carries the full weight of the rollers.

ratings

ranging

Parkway, Meriden, CT 06450,

This in turn prolongs the life of the

USA. Tel: +1 203 237 5541; Fax:

support material. Together they

Woking Business Park, Albert

screen says the company. Contact: Carrier Pollution Control Ltd, East Street,

Drive, Woking, Surrey GU21 5JY

Baintree, CM7 3JL, UK. Tel: +44

than meltblown filter cartridges. In

produce a staggered pleat that possesses larger spaces between the

addition, the meltblown filters had

pleats, particularly at the core,

Fax: +44 1483 730078.

According to the company, in field and laboratory tests the flow distribution channels produced significantly lower pressure drops

+1 203 238 8977; or Cuno Ltd, 21

Tel:

+44

1483

735900;

1376 323349; Fax: +44 1376 552562.

Launching high rated filter cartridges US based North American Filter Corp (NAFCO), a manufacturer of industrial filters and equipment for liquids and air recently introduced a new range of Micropure flter cartridges for absolute and nominally rated filters, prefilters and final filters. The POLl series are high surface area membrane filters, which are based on a naturally hydrophobic

Filtration+Separation

polypropylene membrane that provides sub-micron filtration, low differential pressures and excellent chemical compatibility. The POLI filter has been designed for applications such as acids, alcohol, bases, esters, glycols, sodium hydrochloride and process gases. Constructed of a polytetraflouroethylene (PTFE) membrane, theTFE-Micropure series are said to

have high flow rates. According to NAFCO, high chemical resistance and thermal stability make the TFE series ideal for demanding filtration applications such as inorganic acids, processes gases, moist gases, wine and spirits and high temperature steam. The third addition is the PESMicropure series, which are constructed of a polyethersulfone

membrane. This media is said to provide low protein binding, high flux rates, low differential pressures and high chemical compatibility, and is suitable for the separation of serums, vaccines, enzymes, wine and liquor and mineral water. Contact: NAFCO, 200 Westshore Boulevard, Newark, N Y 14513, USA. Tel: +I 315 331 7000; Fax: +I 315 331 4750.

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