Description
Made only of fluoroplastics (PTFE/PFA) – without any sealing materials. These vacuum filters are resistant to virtually all chemicals and do not release any trace elements into the filtrate. The filtering membrane is easily interchangeable after disassembly of the sample funnel. A multi-stage hose connector with sleeve nut used as a vacuum connector is adapted to the most common vacuum tubings. The PFA lid on top of the sample funnel prevents contamination of the samples. The non-adhesive surfaces of the fluoroplastics (PTFE/PFA) allows easy cleaning of these vacuum filters. Thus, they have a long working life.
Table: Filtration flow rate for different pore sizes (PTFE membrane, differential pressure 100 kPa)
for a 47 mm diameter membrane with 0,2 mm thickness
| Pore size (µm) | flow rate (ml/min) |
| 1 | 510 |
| 0.45 | 148 |
| 0.2 | 57 |
for a 90 mm diameter membrane with 0,2 mm thickness
| Pore size (µm) | flow rate (ml/min) |
| 1 | 1638 |
| 0.45 | 369 |
| 0.2 | 121 |
Model (supplied without filtering membrane)
| Reference | Membrane diameter | Filtration surface | Capacity | Total height | Ext. diameter |
| N1650-8 | 47 mm | 13.8 cm2 | 240 ml | 250 mm | 86 mm |
| N1650-16 | 47 mm | 13.8 cm2 | 500 ml | 290 mm | 100 mm |
| N1650-24 | 90 mm | 55.4 cm2 | 1000 ml | 370 mm | 130 mm |
