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Typical Properties of Filter Papers and Glass Fiber Filters

Flow rate, particle retention, and thickness are some of the aspects you need to consider when choosing the most suitable filter paper for your application. The selection tree and tables on this page help you identify the appropriate product.

1. Use the decision tree below to identify the filter paper that meets your needs.

2. Use the tables in the tabs below to choose the most suitable product for your filtration needs. The tables provide overviews of typical properties of different types of filter papers and glass fiber filters.

Quantitative Filter Papers Qualitative Filter Papers Glass Fiber and Quartz Fiber Other Filter Papers

Ashless quantitative filter papers

Grade Nominal Thickness (µm) Nominal Basis Weight (g/m²) Nominal Ash Content* Typical Water Flow Rate (normalised for 9 cm diameter)** Typical Particle Retention in Liquid at 98% Efficiency (µm)***
40 210 95 g/m² 0.007% 25 ml/min 8
41 215 85 0.007% 254 ml/min 20
42 200 100 0.007% 5 ml/min 2.5
43 220 95 0.007% 62 ml/min 6
44 176 80 0.007% 11 ml/min 3
589/1**** 190 80 0.01%   12 to 25
589/2**** 180 85 0.01%   4 to 12
589/3**** 160 84 0.01%   < 2

Hardened ashless quantitative filter papers

Grade Nominal Thickness (µm) Nominal Basis Weight (g/m²) Nominal Ash Content1) Typical Water Flow Rate (normalised for 9 cm diameter)** Typical Particle Retention in Liquid at 98% Efficiency (µm)***
540 160 85 0.005% 97 ml/min 8
541 155 78 0.005% 359 ml/min 22
542 150 96 0.005% 13 ml/min 2.7

Hardened low ash quantitative filter papers

Grade Nominal Thickness (µm) Nominal Basis Weight (g/m²) Nominal Ash Content* Typical Water Flow Rate (normalised for 9 cm diameter)** Typical Particle Retention in Liquid at 98% Efficiency (µm)***
50 115 96 0.015% 10 ml/min 2.7
52 175 96 0.015% 66 ml/min 7
54 185 90 0.015% 453 ml/min 22

*Ash content is determined by ignition of the cellulose filter at 900°C in air

**Measured under gravity for comparative purposes

***Particle retention rating at 98% efficiency

****Please note that this data may be based on historic performance, which was established before Whatman was acquired by GE Healthcare.  

Standard qualitative filter papers

Grade Nominal Thickness (µm) Nominal Basis Weight (g/m²) Typical Water Flow Rate (normalised for 9 cm diameter)* Typical Particle Retention in Liquid at 98% Efficiency (µm)** Prepleated grade
1 180 87 57 ml/min 11  
2 190 97 38 ml/min 8 Grade 2V
3 390 185 28 ml/min 6  
4 210 92 247 ml/min 25  
5 200 100 5 ml/min 2.5 Grade 5V
591*** 350 161 + 12  
595*** 150 68 + 7 Grade 595 ½
597*** 180 85 + 7 Grade 597 ½
598*** 320 140 + 10 Grade 598 ½
6 180 105 22 ml/min 3  
602 h*** 160 84 + < 2 Grade 602 h ½

Wet strenghtened qualitative filter papers

Grade Nominal Thickness (µm) Nominal Basis Weight (g/m²) Typical Water Flow Rate (normalised for 9 cm diameter)* Typical Particle Retention in Liquid at 98% Efficiency (µm)** Prepleated grade
113 420 125 774 ml/min > 15 Grade 113V
114 190 75 333 ml/min 25 Grade 114V
1573*** 170 88 + 25 Grade 1573 ½
1575*** 140 92 + < 2  
588*** 205 80 +  -  
91 205 65 274 ml/min 10  
93 145 65 194 ml/min 10  

*Measured under gravity for comparative purposes

**Particle retention rating at 98% efficiency.

***Please note that this data may be based on historic performance, which was established before Whatman was acquired by GE Healthcare. 

+ Not measured under these conditions 

Glass fiber filters without binder

Grade Nominal Thickness (µm) Nominal Basis Weight (g/m²) Typical Particle Retention in Liquid at 98% Efficiency (µm)* Nominal Particle Retention Efficiency in Air (for 0.3µm) Nominal Air Flow Rate Typical Water Flow Rate (normalised for 9cm diameter)**
GF/A 260 53 1.6 ≥ 99.95% 4.3 s/100 ml/in² 143 ml/min
GF/B 675 143 1.0   12 s/100 ml/in² 81 ml/min
GF/C 260 53 1.2   6.7 s/100 ml/in² 105 ml/min
GF/D 675 121 2.7   2.6 s/100 ml/in² 681 ml/min
GF/F 420 75 0.7   19 s/100 ml/in² 41 ml/min
934-AH 435 64 1.5   3.7 s/100 ml/in² 341 ml/min
TCLP 420 75 0.7   4.7 s/100 ml/in² 60 ml/min
EPM 2000 - 85   ≥ 99.95% 5.6 s/100 ml/in²  
GMF 150 (multilayer) 730 145 >1 µm   4 s/100 ml/in² 222 ml/min
GMF 150 (multilayer) 750 145 >2 µm   1.6 s/100 ml/in² 887 ml/min

*Particle Retention Rating at 98% efficiency

**Measured under gravity for comparative purposes

Glass fiber filters with binder

Grade Binder Typical Thickness (µm) Basis Weight (g/m²) Air Flow Rate
GF 3362 Inorganic binder 500 130 34 s/100 ml/1.56 cm²
GF 6 Inorganic binder 350 80 40 s/100 ml/1.53 cm²
GF 8 Inorganic binder 350 80 12 s/100 ml/1.56 cm²
GF 9 Inorganic binder 350 70 27 s/100 ml/1.56 cm²
GF 92 Inorganic binder 350 70 27 s/100 ml/1.56 cm²
GF 10 Organic binder 350 70 12 s/100 ml/1.56 cm²

Please note that the data in the table above may be based on historic performance, which was established before Whatman was acquired by GE Healthcare.

Quartz fiber filters

Grade Nominal Thickness (µm) Nominal Basis Weight (g/m²) Nominal Particle Retention Efficiency in Air (for 0.3µm) Air Flow Rate
QM-A 475 85 ≥ 99.95% 6.3 s/100 ml/in²
QM-B 950 170 ≥ 99.95% 12 s/100 ml/in²
QM-H (100% pure quartz) 430 85    

 

Filter papers for technical use

Grade Typical Thickness (µm) Basis Weight (g/m²) Nominal Particle Retention in Liquid (µm)* Prepleated Grade
0858 170 75 12 Grade 0858 ½
0860 170 75 12 Grade 0860 ½
0903 140 65 7  
0905 270 75 25 Grade 0905 ½
1574 160 90 12 Grade 1574 ½
2294 1500 556 15  
2589 a 430 200 12  
2589 c 750 400 8  
2589 d 1000 500 6  
520 a 300 90 18 Grade 520 a ½
520 bII 500 135 19 Grade 520 bII ½
Shark Skin 170 44 12  

*Particle retention rating at 98% efficiency.

Please note that the data above may be based on historic performance, which was established before Whatman was acquired by GE Healthcare.

Application specific filters

Grade Typical Thickness (µm) Basis Weight (g/m²) Examples of Applications / Properties
3000* 160 68 Sugar industry 
3459* 300 75 Venema unit
512 ½* 160 84 Soil analysis—Low phosphate
2555 ½* 170 75 Malt and beer testing
287 ½* 360 154 Kieselguhr paper
0048* 860 130 Food industry mat
72 800 195 Activated carbon loaded paper

*Please note that this data may be based on historic performance, which was established before Whatman was acquired by GE Healthcare.

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