• Dechlorination of water
• Correction of off color, flavor and odors in distilled spirits
• Decolorization of sweetener and sugar syrups
• Color correction in juice and beer application
• Gelatin decolorization and deodorization

Food Contact Compliance

• Food contact compliant filters are available. Please consult the Declarations of Compliance for applicable part numbers at the links below.
• Seitz® AKS4 Series Depth Filter Sheets Declaration of Compliance

Main Constituents

• Cellulose, powdered activated carbon, diatomaceous earth (DE, Kieselguhr)

Adsorption Capability

At an optimized flow rate, the probability of contact between the impurities and carbon particles is greater in carbonimpregnated sheets. This is due to process fluids more efficiently contacting carbon particles immobilized into a sheet matrix. Because of the depth (thickness) of the sheet, it is possible to consider the structure as being made up of a series of layers containing PAC. Having a depth of PAC and passing the fluid at an optimal flow rate through that depth enables maximum utilization of the carbon.

Macro- and mesopores can generally be regarded as the highways into the carbon particle, and are crucial for adsorption kinetics. Macropores are used for the transport, and adsorption occurs in the meso- and micropores.

Small molecules, such as methylene blue, which has a molecular weight of 319.86 Dalton, are mainly captured in micropores. Typically, over 20 g/m2 methylene blue is adsorbed.

Characterization

Sheet with Protection Paper	Mass per Unit Area g/m2	Thickness mm	Ash %	Water Permeability1 l/m2/min (gal/ft2/min)
No	1050	3.8	13	291 (7.2)
Yes	1050	3.8	13	100 (2.5)

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.

Regeneration

Depending upon the application and the nature of the adsorbed contaminants, AKS series filter sheets may be regenerated by means of rinsing with clean water in the forward direction. However, the achievable regeneration efficiency must be determined by monitoring filtrate quality.

Sterilization and Sanitization

Method	Temperature °C (°F)	Maximum Differential Pressure Bar (psi)	Time2 Cycle min
Steam	125 (257)	0.5 (7.2)	20
Hot Water	90 (194)	1 (14.5)	30

¹The permeability was measured under test conditions with clean water at 20 °C (68 °F) and a Δp of 1 bar (14.5 psi).
²The actual time required may vary as a function of the process conditions.

Quality

• Filter sheets produced in a controlled environment
• Manufactured according to ISO 9001:2008 certified Quality Management System

Filter Sheets

General Instructions for Use

To achieve optimal filtrate quality, Pall recommends the use of protection paper downstream. Sheet options which include a downstream protection paper are available³.

In order to maximize the required adsorption of impurities, particle filtration must occur upstream of carbon-impregnated filter sheets.

Filtration Guidelines

Typical flux rates used on food and beverage fluids are 150- 250 L/m²/h (3.7-6.2 gal/ft²/h).

Higher fluxes may be possible according to the application. Due to the various factors, which may affect the adsorption process, Pall recommends an initial scaled-down testing as a reliable method of qualifying filter performance.

For additional operating guidelines, including rinsing of sheets prior to use, please refer to instructions provided by Pall.

³Sheets are available with or without downstream protection paper. Please indicate which type is required upon order placement.

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")

Other formats are available on request.

Seitz K series filter sheets are also available in SUPRAdisc™ II module configurations.

Please contact Pall.