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

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)
BS 400	1380	3.9	48	95 (2.3)
BS 600	1360	3.9	48	130 (3.2)
BS 800	1320	3.9	48	175 (4.3)
BS 1000	1300	3.8	48	225 (5.5)
BS 1600	1260	3.8	47	305 (7.5)
BS 2000	1240	3.8	46	410 (10.0)

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).

Regeneration

BS filter sheets may be rinsed with clean water (in the forward or reverse³direction) 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.

1. Rinse with warm water (60 °C / 140 °F) for 15 minutes
2. 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 0.5 –1 bar (7.2 –14.5 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

⁴The actual time required may vary as a function of the process conditions.

Filtration Guidelines⁵

Application	Flow Velocity L/m2/h (gal/ft2/h)	Maximum Differential Pressure bar (psi)
Polishing filtration of beer	150 (3.7)	1.5 (21.8)
Reduction of low microbial levels in beer (yeast, spoilage microbes)	150 (3.7)	1.5 (21.8)
Reduction of high microbial levels in beer (yeast, spoilage microbes)	100-120 (2.5-3)	1.5 (21.8)

⁵Please 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

Relative Retention Rating¹

¹Effective removal performance of filter sheets is dependent on process conditions.

Filter Sheets

Available Sheet Formats

Folded Sheets

• 1003 x 2016 mm (39.5 in. x 79.3 in.)
• 1205 x 2420 mm (47.4 in. x 95 in.)

Other formats are available on request. Please contact Pall.