744 Glass Filters webcode WW6PB007 Glass Fibre Filters, Hahnemühle Recommended for environmental analysis and investigation of air and water pollution. • Made of 100% pure borosilicate glass • Chemical stability: It keeps all its properties in contact with acid solutions (except hy - drofluoric acid) and basic solutions at moderate concentrations • Extremely low metal content • High flow speed and high permeability to air • Can be used as prefilter for membranes (GF9) • Deposition of (radioactive) aerosols, monitoring of nuclear power stations • Gravimetric analyses of organic and inorganic contaminations in water and waste water pursuant to DIN 38409 and EN 872 (suspended particles) • Measurement of immissions, dust measurement in the air and in gases, monitoring of filtration and de-dusting efficiency, monitoring of the combustion air of power stations and in the steel and iron industry • Gravimetric measurement of dust release at workplaces and in production processes, breathing air purification • Scintillation measurement Glass fibre with binder, filter cyrcles NEW: Glass fibre filter GF20 with strong hydrophilic binder. Ideal for fast clarification of aqueous solutions and degassing of acidulous solutions (con - taining CO2) Technical specifications: Grade Filtration Gurley s Weight g/m2 Thickness mm Retention rate1) % Max T a °C Binder Filter class GF 6 40 80 0.35 99.97 500 inorg. H 14 GF 8 12 75 0.35 99 500 inorg. – GF 9 27 70 0.35 99.97 500 inorg. U 15 GF 10 12 70 0.35 99.97 180 org. H 13 GF 20 15 86 0.45 – 180 org. – 1) Tested with NaCl particles size <1 µm, maximum at 0.3 to 0.5 µm. Grade Ø mm Order No. PU pc/Pack Grade Ø mm Order No. PU pc/Pack GF 6 25 10 15 96002 100 GF 6 185 10 15 96186 100 GF 6 47 10 15 96047 100 GF 6 293 10 15 96293 100 GF 6 50 10 15 96005 100 GF 9 50 10 15 99050 100 GF 6 55 10 15 96055 100 GF 9 90 10 15 99090 100 GF 6 70 10 15 96007 100 GF 10 47 10 15 91004 100 GF 6 90 10 15 96009 100 GF 10 100 10 15 90100 100 GF 6 100 10 15 96010 100 GF 10 200 10 15 90200 100 GF 6 125 10 15 96127 100 GF 20 150 10 15 90151 250 GF 6 142 10 15 96142 100 Glass fibre without binder, filter circles Technical specifications: Grade Filtration Gurley s Air permeability1) l/m2s (or resistance2)) mbar Weight gr/m2 Thickness mm Retention rate3) % Max T a °C Binder Filter class GF 50 19 25 56 0.29 99.97 500 free H 14 GF 51 44 11 140 1.00 99.993 500 free H 13 GF 52 25 (54) 2) 54 0.28 99.995 500 free U 15 GF 55 67 <10 75 0.40 99.999 500 free U 15 1) According DIN 53887 2) At 400 cm3/s, A= 10 cm2 3) Tested with NaCl particles size <1 µm, maximum at 0.3 to 0.5 µm Grade Ø mm Order No. PU pc/Pack Grade Ø mm Order No. PU pc/Pack GF 50 25 10 15 95002 100 GF 51 47 10 15 95147 100 GF 50 37 10 15 95003 100 GF 52 47 10 15 95204 100 GF 50 47 10 15 95004 100 GF 52 50 10 15 95205 100 GF 50 50 10 15 95005 100 GF 52 70 10 15 95207 100 GF 50 70 10 15 95007 100 GF 52 90 10 15 95209 100 GF 50 90 10 15 95009 100 GF 52 110 10 15 95211 100 GF 50 125 10 15 95012 100 GF 55 47 10 15 95504 100 Glass fibre without binder, sheets Grade Dimensions mm Order No. PU pc/Pack GF 50 203 × 254 10 15 95020 100 Other sizes on request. Notes for handling: Weight consistency: No relevant changes in weight due to variations in the ambient hu - midity. Limited bending resistance. Brushing against other surfaces may cause the loss of fibres (keep the filters in their original box until their use). Separating Systems Filtration
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