2013 Buyers' Guide 2013 Buyers' Guide - Filtration News

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Testing | Filter Performance Determination of Cartridge Filter Performance Via Rigorous Outside ISO-Challenge Testing By Dr. Ernest Mayer, E. Mayer <strong>Filtration</strong> Consulting, LLC F ilter cartridge manufacturers report various ISO test data in their literature per the ASTM F795 test procedure. However, many manufacturers arbitrarily change the test parameters to suit their individual needs so comparison data becomes difficult. As a result, the end user has trouble in assessing the performance of cartridges from different vendors, and usually relies on costly full-scale testing in their plants. This paper discusses a rational approach using approved outside testing labs under controlled conditions. Tests with four typical cartridges will be highlighted along with data collected from an in-house challenge test and PMI Capillary Flow Porometry (CFP) testing. Capillary Flow Porometry (CFP) has been demonstrated to be a useful tool in assessing filter media efficiency (Refs. 1, 2). In addition, CFP results have been extensively compared to unambiguous NIST glass bead challenge testing (Refs. 3-7), and some interesting correlations were developed, (i.e., the B.Pt. divided by the SAE 1.65 tortuosity factor is related to about the 98% efficiency for a variety of flat-sheet media. Refs. 1, 2, and 5, and Figure 1). Furthermore, additional work by PMI, the leading CFP instrument manufacturer (Refs. 8, 9) has extended the earlier flat-sheet work to actual fullscale 10” (or 20”) x 2 ½” D. liquid filter cartridges. As a result, a rather extensive comparison of many vendors’ cartridges was published (Ref. 1), which showed that vendors’ micron ratings are highly variable; and that the Figure I 24 • August 2012 • www.filtnews.com
user was still left with expensive inplant testing. In the ensuing years since the 2004 paper in Ref. 1, PMI has significantly upgraded their High-Flow CFP for cartridges (Refs. 8, 9), and it seemed appropriate to revisit this technology and determine how it compares to the wellpracticed ISO Test Dust Challenge Testing (per the old ASTM F795-88 & F316 procedures) utilizing approved outside labs (IBR – Ref. 10 and IFTS – Ref. 11). Additionally, some selected tests were conducted at Dow with their more realistic industrial-type testing (Refs. 12, 13). Further discussion of the approved European IFTS test procedures can be found in Refs. 14-16. Before the work is presented, it would be instructive to summarize the basic findings of the cartridge tests in Ref. 1 (and subsequent work not shown here), namely: • Low-cost depth cartridges’ micron ratings are overly optimistic and cartridge-to-cartridge variation is significant. • Medium-cost depth cartridges’ micron ratings are far more realistic; and the CFP B.Pt./1.65 ratings compare well with the manufacturers’ ratings. • High-cost depth cartridges’ micron ratings compare very well at the low micron values, but diverge somewhat at the higher > 20µm ratings, but overall the manufacturers’ ratings are quite good. • High-efficiency pleated cartridge micron ratings also compare very well, as expected, since more uniform than the molded or spun depth ones. Thus, this paper will attempt to compare actual ISOCTD Challenge testing with both CFP and selected NIST glass bead data in a rigorous and extensive fashion. TEST RESULTS Updated Depth Cartridge Porometry Comparisons As discussed above, there were some discrepancies in the cartridge data (Ref. 1) such that additional testing was done and Table I details the updated results, and shows: • Low-cost spun cartridges are rated verly optimistic by most vendors; and rarely do they report greater than 90% efficiency. • Medium-cost cartridges are somewhat better (vendor B), but their ratings seem to be more conservative than found here. • Absolute-rated vendor B cartridges are quite good and reasonably rated. • Generally, high cost cartridges (vendors A, C, D, & E) are fairly accurately rated; and if anything are conservative in their ratings. Only the very fine 0.5µm and very coarse cartridges seem to deviate. • A high-cost wound cartridge (vendor F) compares well, but their nominal ratings are very conservative and their 1 and 5µm ones were basically the same. This is generally the case for many of the wound-type depth cartridges. • A high-cost pleated cartridge www.filtnews.com • August 2012 • 25
Page 1: I N T E R N A T I O N A L FILTRATIO
Page 6: Editorial Advisory Board Editorial
Page 10 and 11: Association | News Engineering Meri
Page 12: Industry | Events Whitehouse Scient
Page 16 and 17: Cover Story | A2Z Filtration The Im
Page 18 and 19: Absorbents | Adsorbents Absorbing F
Page 20 and 21: Absorbents | Adsorbents water remov
Page 22 and 23: Absorbents | Adsorbents Removing Wa
Page 24 and 25: Absorbents | Adsorbents table salt)
Page 28 and 29: Testing | Filter Performance (vendo
Page 30: Testing | Filter Performance by IBR
Page 33 and 34: to provide full physical adsorption
Page 35 and 36: ases, presentations are grams adsor
Page 37 and 38: Table 5. Polynomial Equations from
Page 39 and 40: I N T E R N A T I O N A L FILTRATIO
Page 41 and 42: Filter Winding Machinery. .........
Page 43 and 44: Air Filtration Equipment: Cabin Fil
Page 45 and 46: Center Cores: Rosedale Products, In
Page 47 and 48: Dust Collectors: IBIS International
Page 49 and 50: Filter Caps: Rosedale Products, Inc
Page 51 and 52: Matrix Separations LLC PO Box 16369
Page 53 and 54: Filter Manufacturer: Air Filters In
Page 55 and 56: Filter Products: Dexmet Corporation
Page 57 and 58: Filters Automatic: Filters & Strain
Page 59 and 60: Glue Machines: Laminating Machinery
Page 61 and 62: Manufacture Flanges: Membrane-Filtr
Page 63 and 64: fiber & polyester filter media with
Page 65 and 66: Plastic Netting and Tubing: convert
Page 67 and 68: Pleaters Rotary Type: Seals: A2Z Fi
Page 69 and 70: Sonobond Ultrasonics 1191 McDermott
Page 71 and 72: Phoenix Wire Cloth, Inc. 585 Stephe
Page 73 and 74: www.filtnews.com • August 2012

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