3M NT-T User Manual

Betapure™ NT-T Series

The Next Generation in Depth Filter Technology

Betapure™ NT-T Series filter cartridges are 3M’s latest advance in depth filtration technology. The all polypropylene filter is constructed using a design that utilizes flow enhancing filter media and an innovative flow pattern. The result is an absolute-rated filter with vastly superior on-stream life that provides more cost effective filtration than conventional melt-blown filter technologies. Betapure NT-T Series filter cartridges - the new leader in filtration performance.

Betapure NT-T Series Filter Construction

The Betapure NT-T Series cartridge was designed to provide significantly superior service life while maintaining a consistent filtration efficiency. Betapure NT-T Series filters achieve this through an innovative cartridge design that allows uniform distribution of fluid flow and contaminant throughout the entire depth of the cartridge. Betapure NT-T Series filter construction combines a polypropylene media with fluid distribution netting to form multiple layers. Critically positioned media flow channels allow greater movement of fluid from layer to layer. Three distinct media sections, made from multiple media/netting layers, are combined to form the filter cartridge.

Figure 1: Betapure NT-T Series Media Sections. Note that the actual ﬁ lter sections contain multiple layers of media.

Features & Beneﬁ ts

Superior Service Life.

■

As much as 3 times greater dirt holding capacity than competitive ﬁ lters.

All polypropylene depth ﬁ lter cartridges.

■

Allow for broad chemical and temperature compatibility.

Ratings from 0.5 to 70 micron.

■

Suit a wide range of applications.

Absolute-Rated Performance.

■

Allows for consistent ﬁ ltration quality.

Exhibits Superior Particle Retention Under Increasing Differential Pressure.

Filter Cartridges

Applications

Chemical and Acids, bleach (sodium hypo- Hydrocarbon chlorite), polyethylene & poly- Processing propylene manufacture, amine

sweetening & water ﬂ ood

Food & Beverage Bottled water particulate & tur- bidity reduction, reverse osmo sis membrane & spray nozzle protection, diatomaceous earth or carbon ﬁ ne trap & beverage

blending, rinsing & wash water

Fine Chemical Pre-RO ﬁ ltration of high silt and Electronics density index incoming water,

copper sulfate plating bath ﬁ ltration in printed circuit board construction and color screen ﬁ ltration for CRT production

Coating Film & paper coatings, photo graphic ﬁ lm, lens coatings & can coatings, high quality

paints & ink

Industrial Machine tool lubrication, chemi cals, detergents, and waste

water, textiles, plating baths, pulp & paper, process water & ground water remediation

Series

Osmonics Selex

37 / 30

The outer and middle sections contain multiple layers of interleaved filter media and fluid distribution netting. Within each media layer a portion of the fluid travels through the media while the balance of the fluid is delivered directly to the next distribution layer through the flow channels. The fluid distribution netting provides longitudinal and latitudinal flow paths to evenly distribute fluid flow across the surface of each successive media layer.

The Difference is Performance

Flow channels appear in the outer and middle sections of the filter matrix, as seen in the cartridge cut-away. The size, number, and location of the flow channels combined with the fluid distribution netting ensure that a uniform amount of contaminant is distributed to each layer within these two sections, while maintaining a consistent flow.

Cut-away of the Betapure NT-T Series ﬁ lter cartridge showing the three sections of media layers and core

Graph 1: Betapure NT-T Series ﬁlters deliver longer service life

Service Life C omparison of 20 µm Filter Cartridges

100

Percent of Betapure NT-T Series Life

Betapure NT-T Series

Competitor B

Gradient Pore Structure Melt-Blown with Core

Competitor A

Gradient Pore Structure Melt-Blown with Core

Competitor C

Graded Density Structure Melt-Blown, Coreless

The number of media flow channels decrease from the outer to middle sections to ensure even contaminant loading throughout the entire filter matrix. Extensive laboratory testing has demonstrated that 3M has developed the optimal filter cartridge design.

The inner section, supported by a rigid polypropylene core and equal to approximately one third of the filter’s depth, contains no flow channels and is the final qualifying section ensuring absolute rated performance.

The even distribution of contaminated fluid throughout the depth of the cartridge is the key to the Betapure NT-T Series filter’ s exceptionally long service life, low pressure drops, and increased cost effectiveness.

The Result

Superior Filter Service Life

Extensive testing has demonstrated that competitive filters of equivalent removal ratings subjected to the same contaminant load plug more quickly than Betapure NT-T Series filters. The result is significantly shorter service life, and unpredictable filtration efficiencies. Betapure NT -T Series filters provide a service life improvement of up to 3 times greater than competitive products. (Graph 1 )

Lower Pressure Drop

The design and construction of the Betapure NT-T Series cartridge allows for significantly lower pressure drops compared to equivalently rated polypropylene depth filters. Based on published data, a Betapure NT-T Series filter system with a given flow would use up to 75% few er cartridges than Osmonics Selex, 68% fewer than Pall® Profile , an d 42% fewer than Pall® Nexis. T o underscore the Betapure NT-T Series filter cost benefit, use the example in T able 1 as a guideline.

Table 1: Comparison of 5 Micron* Filters in a 110 GPM Syste

etapure NT-T

Filter

Flow (gpm) / 10” cartridge @ 1 psi

Number of filters for a 110 gpm flow rate

Based on the manufacturers published ratin

3.1 1.

12 / 30”

artridges

ll Profil

cartridges

1.8 0. 8

”

21 / 30” cartridges

ll Nexi

43 / 30” cartridges

For the same initial cartridge differential pressure, a 1 10 gpm system using Betapure

)

01T0202T0303T0505T100

020T30030T40040

T50050T70070

NT-T Series filters require significantly fewer cartridges. This results in lower capital investment for the filter housing and fewer cartridges to purchase.

The Conﬁ dence of Consistency

Betapure™ NT-T Series filters utilize advanced design and construction to achieve a level of filtration consistency unattainable by competitive filters. Combined with an exceptionally long service life, the Betapure NT-T Series filter’s consistent performance, as illustrated by comparative Beta-Ratio vs. Differential Pressure (Graph 2), provides predictable results throughout the filters’ usable life. Filters A, B, and C show a degradation in the Beta-Ratio as psid increases. These filters exhibit a pattern of either unloading previously held particles or a loss of filtration efficiency. The result of this inconsistent performance is a reduction in finished product quality, product yield, and an increase in total filtration cost.

Absolute Rated Betapure NT-T Series

Consistent filtration performance, time after time, from start to finish is the goal of every filter user. Absolute removal ratings for Betapure NT-T Series filters are determined using a filter performance test developed by 3M to comply with the general procedures outlines in ASTM STP 975. 3M defines absolute rating as the particle size (x) providing an initial Beta Ratio (Bx) = 1000. At this Beta Ratio, the removal efficiency is equal to 99.9%. Betapure NT-T Series filter ratings are specified in Table 2.

Betapure™ NT-T Series

Graph 2: Beta Ratios demonstrate the Betapure NT-T Series ﬁlter’s ability to perform consistently throughout its life

Beta Ratio Comparison of 20µm Filter Cartridges

1000

900

800

700

600

500

400

300

200

Beta Ratio

100

Betapure NT-T Series

Competitor B

Gradient Pore Structure Melt-Blown with Core

0.5 1 10Initial

Differential Pressure (psid)

Filter Cartridges

Competitor A

Gradient Pore Structure Melt-Blown with Core

Competitor C

Graded Density Structure Melt-Blown, Coreless

Your Beneﬁ t - Total Filtration Cost Reduction

The Betapure NT-T Series filter’s performance and superior life advantage allows direct cost savings by reducing the number of filters used. In addition, the resulting reduction in filter change-out frequency decreases direct labor and filter disposal costs. Betapure NT-T Series filter cartridges - providing performance and value.

Table 2: Betapure NT-T Series Filter Ratin

Grade Designatio

005 0.5

T01

T20

* extrapolate

Absolute Rating (Micron

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