Qualitative Filter Paper, 25 cm dia, White, Cotton, Grade 631, Standard, Non Wet-strengthened Grade Type, Circle Format, 0.235 mm Thickness, 10 µm Particle Retention in Liquid, 87.8 g/m2 Nominal Basis Weight, Medium Flow, Coarse Porosity
Ahlstrom grade 631 is used for filtration of coarse particles and some gelatinous precipitates air monitoring when high flow rate is needed and in routine cleanup analysis of insoluble liquids. This low ash grade contains more than 95% super refined alpha-cellulose and linter fibers. Flow rate: medium. Retention: 10 µ. Ahlstrom offers a complete range of low ash filter papers for general laboratory work that provides you with the correct combination of particle retention filtration speed loading capacity and wet-strength. All our qualitative grades consist of > 95% super refined a-cellulose and linter fibers.
Diameter | : | 25 cm |
Grade | : | 631 |
Color | : | White |
Material (ml/min) | : | Cotton |
Ash Content | : | 0.06% |
Grade Type | : | Standard, Non Wet-strengthened |
Type | : | Qualitative |
Alpha Cellulose Content | : | >95% Super Refined |
Filtration Speed | : | 34 sec/100 ml (Herzberg) |
Format | : | Circle |
Particle Retention in Liquid | : | 10 µm |
Properties | : | Medium Flow, Coarse Porosity |
Thickness | : | 0.235 mm |
Typical Water Flow Rate | : | 200 ml/min |
Wet Burst Pressure | : | 76.2 cm |
Loading Capacity | : | High |
Rapidity Filtration Speed | : | 200 ml/min |
Klemm (Capillary Rise) | : | 38 mm/min |
Frazier Air Permeability | : | 4.5 cfm/ft2 |
Basis Weight | : | 87.8 g/m2 |