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Stacked disc modules have a long history in Food and Beverage applications. They arose out of the need to package sheet-based depth filter technology in more user-friendly, modular closed systems, especially for small batch production or medium flow rate applications. Due to the relative high dirt holding capacity and filtration performance of filter sheet-based products, they provided an optimal and cost-effective solution for handling food and beverage fluids.
The filtration effect of these sheet-based products is based on a combination of surface, depth, and adsorptive filtration. Selected combinations of cellulose, different types of filter aids, or other ingredients in the filter matrix result in a highly porous structure, which achieves effective filtration, including coarse to fine particle removal, colloidal removal, and final filtration.
Classic stacked disc modules represent first generation module design, but they have performance disadvantages.
SUPRAdisc II modules eliminate the disadvantages of classic stacked disc modules. They offer increased capacity, reliability, handling advantages, and robustness, which satisfies customer needs and requirements for a higher performing product.
To better appreciate the design advancements of SUPRAdisc II filter modules, an understanding of the basic features and construction of stacked disc modules should be considered.
Since their inception, classic stacked disc modules have been manufactured leaving the cells of media fully exposed within the filter housing (Figures 1 and 2).
Classic stacked disc modules have inherent design limitations.
SUPRAdisc II modules (Figure 5) incorporate a double separator concept.
The unique separator design provides both upstream and downstream support of the filter media. The media is sealed inside a polypropylene cage assembly and is no longer exposed. The unique Clip-Seal Interlock and the welded design connects the outside to the inside separators resulting in an extremely robust design (Figures 6,7).
Each sheet of filtration media is individually sealed and separated. Depth sheets cannot come into contact with each other, eliminating blinding of the media.
Due to the separator channels, SUPRAdisc II modules have close to 100 % effective filtration area that is dimensionally stable during shipment and handling, filtration and removal.
Deformation or cell collapse is no longer an issue and sheet damage during use is minimized. Backflushing to regenerate the modules is now possible.
With the use of a backflush set consisting of supporting discs and intermediate distance discs (Figure 8), modules can be backflushed either with water or product in order to remove contaminants and prolong their life.
For more detailed information on backflushing and availability of backflush sets, please contact Pall.
SUPRAdisc II modules offer a multitude of benefits that overcome the disadvantages of the classical stacked disc design (Figures 9, 10, 11). These benefits result in important cost savings.
Pall Corporation has used design, cost, and industry expectation as the creative foundation of our depth filter technology. In combination with our stringent manufacturing standards, we have developed a line of depth filter module housings for food and beverage applications.
Pall Corporation has used design, cost, and industry expectation as the creative foundation of our depth filter technology. In combination with our stringent manufacturing standards, we have developed a line of depth filter module housings for food and beverage applications.
The modules available for on-line purchase are shown in the table below. For additional sizes and configurations, please contact a Pall representative. Accessories are sold separately.
Material | Housing Diameter | Number of Modules | Inlet/Outlet Connection | Housing Volume |
---|---|---|---|---|
WSFZ162F31UT5J | 16 in | 2 | 2 in Triclamp | 105 L |
WSFZ164F31UT5J | 16 in | 4 | 2 in Triclamp | 191 L |
SUPRAdisc II modules can be multi-cycle water flushed in a forward flow direction, enabling a very good release of contaminants soluble in hot water without denaturing proteins that could cause premature plugging of the modules. The modules can additionally be regenerated by backflushing multiple times, to release surface load of hop particulates and residues, yeast and other particles. Flushing in forward and reverse direction is a common operation used in breweries to increase the overall throughput of the modules.
For breweries using reverse flushing as part of their regeneration process, Pall recommends backflush devices for additional support. A backflush support kit is available for on-line purchase:
Part number : 20041342
Description: Backflush support set for WSFZ Series filter housings
With 13 different grades of permeability, the K Series modules represent Pall's standard depth filter series. These sheets consist of a cellulose matrix with very fine kieselguhr (diatomaceous earth or DE) mixtures and perlite, as filtration-active substances.
Table 1: Removal performance of K Series Modules
Sheet Media Type | Application | Examples of use |
---|---|---|
EKS, EK1, EK, KS 50, KS 80 |
Fine Filtration | Microorganism reduction in beer with moderate to high microbial load |
K100, K150, K200, K250, K300 |
Polishing Filtration |
Microorganism reduction in beer with low microbial load Fine filtration of beer and yeast removal Fine filtration of beer following DE prefiltration Polishing filtration of beer |
K700, K800, K900 | Coarse Filtration |
Clarification of beer |
These modules are used for a wide range of very fine to coarse filtration in many food and beverage applications.
SUPRApak vs Filter Press setup time
SUPRApak vs Filter Press setup time
This is a guide to the Part Numbering structure only. For specific options, please contact Pall
See bold reference codes in tables
Table 1
Code | Sheet Media Type |
---|---|
K Series | |
XEKS | EKS |
XEK1 | EK1 |
XEKO | EK |
X050 | KS50 |
X080 | KS80 |
X100 | K100 |
X150 | K150 |
X200 | K200 |
X250 | K250 |
X300 | K300 |
X700 | K700 |
X800 | K800 |
X900 | K900 |
Table 2
Code | Adapter | Nominal Height |
---|---|---|
C | Flat gasket | 272 mm (10.7 in) |
Table 3
Code | Nominal Diameter | Number of Sheets | Area |
---|---|---|---|
232 | 287 mm (12 in) | 32 | 1.8 m2 (19.4 ft2) |
440 | 410 mm (16 in) | 40 | 5 m2 (54 ft2) |
Alternative module dimensions are available on request.
Code | O-ring Seal Options |
---|---|
S | Silicone (standard) |
E | EPDM |
Code |
Cage Assembly |
---|---|
P | Polypropylene |