Seitz HS series depth filter sheets were developed to meet the production needs and requirements of the food and beverage industry for various products such as beer, gelatin or enzymes.
From the selection and quality control of raw materials to application of the latest production technologies, the HS filter sheets meet the highest quality standards. The high stability of HS sheets enables long production runs of aqueous and higher viscous fluids at low and high temperatures.
HS filter sheets are available in multiple grades suitable for microbial reduction and applications requiring fine, clarifying and coarse filtration.
|Homogenous and consistent media, available in multiple grades||
|Media stability due to high wet strength||
|A combination of surface, depth and adsorptive filtration||
|Each individual filter sheet is laser etched with the sheet grade, batch number and production date.||
Food Contact Compliance
Please refer to the Pall website for a Declaration of Compliance to specific National Legislation and/or Regional Regulatory requirements for food contact use.
|Fine filtration of beer for bacteria and yeast reduction
Microorganism reduction in enzymes
|For beer clarification and DE trap filtration
Polishing filtration of thick broth gelatin
Fine filtration of enzymes
Clarification of thin broth gelatin
|Prefiltration and coarse filtration of beer
Clarification of thin broth gelatin and enzymes
|HS 9000||Coarse filtration of enzymes|
Cellulose, diatomaceous earth (DE, Kieselguhr), perlite.
|Product Line||Mass per Unit Area
|Thickness(mm) Mean||Ash Content % Mean||Water Permeability at 1,0 bar L/m2/min (gal/ft2/min)|
|HS 200||1400||3.8||53||52 (1.28)|
|HS 400||1350||3.7||45||94 (2.31)|
|HS 800||1350||3.7||46||150 (3.68)|
|HS 1000||1350||3.9||45||187 (4.59)|
|HS 2000||1240||4.0||47||363 (8.91)|
|HS 4000||1220||4.0||46||648 (15.91)|
|HS 6000||1200||4.1||45||935 (22.95)|
|HS 9000||1150||4.1||45||1748 (42.90)|
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.
2 The permeability was measured under test conditions with clean water at 20 °C (68 °F) and a Δp of 1 bar (14.5 psi).
HS series filter sheets may be rinsed with clean water (in the forward or reverse3 direction) to increase throughput and to optimize economic efficiency. Optimal regeneration of filter sheets installed in a plate and frame filter may be achieved with serial rinses of warm water followed by hot water. An example protocol is shown below.
- Rinse with warm water (60 °C / 140 °F) for 15 minutes
- Rinse with hot water (70 – 80 °C / 158 – 176 °F) for 8 – 10 minutes
The rinse flow rate should be equivalent to the filtration flow rate with a back pressure of up to 0.5 bar (7.2 psi).
3 When rinsing in the reverse flow direction it is critical to control particulate and microbial levels in the rinse water so that the filtrate side of the sheet is not contaminated. Water used for reverse flow flushes should be particle-free, and if the filter will not be sterilized prior to re-use the water should be free of microbes. Backwashing should be in a diagonal direction from outlet to inlet in a plate and frame filter.
Sterilization and Sanitization
|Method||Temperature °C(°F)||Maximum Differential Pressure bar (psi)||Time4/Cycle min|
|Steam||125 (257)||0.5 (7.2)||20|
|Hot Water||90 (194)||1 (14.5)||30|
4 The actual time required may vary as a function of the process conditions.
As the filtrate quality can be impacted by the filtration flow rate, the following table provides guidelines for flux rate.
|Maximum Differential Pressure bar (psi)|
|Beer clarification||150-300 (3.7-7.4)||2.5 (36.3)|
|Microbial reduction in beer||100-200 (2.5-4.9)||1.5 (21.8)|
|Thin broth gelatin clarification||300-500 (7.4-12.3)||3 (43.5)|
|Thick broth gelatin polishing||50-60 (1.2-1.5)||3 (43.5)|
|Enzyme microbial reduction||525 (12.9)||1.5 (21.8)|
|Enzyme polishing||525 (12.9)||3 (43.5)|
5 Please 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.
- Filter sheets produced in a controlled environment
- Manufactured according to ISO 9001:2008 certified Quality Management System
Relative Retention Rating1
1 Effective removal performance of filter sheets is dependent on process conditions.
Available Sheet FormatsRectangular Sheets
400 mm x 400 mm (15.8" x 15.8")
600 mm x 612 mm (23.6" x 24.1")
800 mm x 1625 mm (31.5" x 63.9")
1003 mm x 2016 mm (39.5" x 79.3")
1205 mm x 2420 mm (47.4" x 95.3")