Seitz HR series depth filter sheets were developed to meet the production needs and requirements of the industrial enzyme industry.
From the selection and quality control of raw materials to application of the latest production technologies, HR filter sheets meet the highest quality standards.
Due to a surface modification and the presence of polyolefin fibers, these sheets are suited for the filtration of cellulosedegrading enzyme solutions. The resulting structural properties lead to improved sealing and reduced edge losses.
From the selection and quality control of raw materials to application of the latest production technologies, HR filter sheets meet the highest quality standards.
Due to a surface modification and the presence of polyolefin fibers, these sheets are suited for the filtration of cellulosedegrading enzyme solutions. The resulting structural properties lead to improved sealing and reduced edge losses.
| Features | Benefits |
| Homogenous and consistent media, available in three grades |
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| Media stability due to high wet strength and media composition |
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| A combination of surface, depth and adsorptive filtration, coupled with a positive zeta potential |
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| Each individual filter sheet is laser etched with the sheet grade, batch number and production date. |
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| Grade | Application |
| HR 100 | Fine filtration and reduction of microorganisms in cellulase enzyme solutions |
| HR 2000 | Cellulase enzyme clarification and fine filtration |
| HR 9000 | Diatomaceous earth support sheet for cellulase enzyme filtration Coarse filtration of cellulase enzymes |
Food Contact Compliance
- Food contact compliant filters are available. Please consult the Declarations of Compliance for applicable part numbers at the links below.
- Please refer to the Pall website for a Declaration of Compliance to specific National Legislation and/or Regional Regulatory requirements for food contact use.
Main Constituents
Polyolefin fibers, cellulose, diatomaceous earth (DE, Kieselguhr), perlite.Characterization
| Grade | Mass per Unit Area g/m2 | Thickness mm | Ash % | Water Permeability2 L/m2/min (gal/ft2/min) |
| HR 100 | 1360 | 3.9 | 46 | 51 (1.2) |
| HR 2000 | 1220 | 3.9 | 45 | 350 (8.6) |
| HR 9000 | 1200 | 4.8 | 45 | 1550 (38.1) |
These figures have been determined in accordance with in-house test methods and the methods of the Technical / Analytical Work Group within the European Depth Filtration Association.
2The permeability was measured under test conditions with clean water at 20 °C (68 °F) and a Δp of 1 bar (14.5 psi).
Cellulase Resistance
Seitz HR and standard Seitz K series filter sheets were tested for their resistance to cellulase under controlled laboratory conditions. After immersion, the burst force of the samples was measured.
HR sheets exhibit high wet strength when exposed to cellulase enzymes.
Sterilization and Sanitization
| Method | Temperature °C (°F) | Maximum Differential Pressure bar (psi) | Time3/ Cycle min |
| Steam | 125 (257) | 0.5 (7.2) | 20 |
| Hot Water | 90 (194) | 1 (14.5) | 30 |
3The actual time required mtay vary as a funcion of the process conditions.
Filtration Guidelines4
As the filtrate quality can be impacted by the filtration flow rate, the following table provides guidelines for flux rate.| Application | Flow Velocity L/m2/h (gal/ft2/h) | Maximum Differential Pressure bar (psi) |
| Bacteria load reduction from cellulase enzymes | 525 (12.9) | 1.5 (21.8) |
| Cellulase enzyme fine filtration | 525 (12.9) | 3 (43.5) |
| Clarification of cellulase enzymes | 850 (20.9) | 3 (43.5) |
| Coarse filtration of cellulase enzymes | 850 (20.9) | 3 (43.5) |
4Please contact Pall for recommendations on your specific filtration process as results may vary by product, pre-filtration and filtration conditions.
For additional operating guidelines, including rinsing of sheets prior to use, please refer to instructions provided by Pall.
Quality
- Filter sheets produced in a controlled environment
- Manufactured according to ISO 9001:2008 certified Quality Management System
Nominal Retention1
1Measured under laboratory test conditions. Removal performance of filter sheets is nominal and dependent on process conditions. There is no standardized method among manufacturers for its characterization.
Filter Sheets
Available Sheet Formats
Rectangular Sheets- 400 mm x 400 mm (15.8" x 15.8")
- 600 mm x 612 mm (23.6" x 24.1")
Seitz HR filter sheets are also available in SUPRApak™ and SUPRAdisc™ module configurations. Please contact Pall.
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