They are made purely of PTFE (polytetrafluoroethylene) and are therefore permanently hydrophobic.
Unlike other (hydrophilic) filter types, they are not wetted by air humidity, allowing unhindered passage of air at low differential pressures.
CHM® MTF membrane filters have an excellent chemical compatibility; they are also used for the filtration of aggressive chemicals, and acids, to which other filter types are not resistant.
Due to their hydrophobic characteristics, they must be pre-wetted with ethanol or methanol before the filtration of aqueous media.
The main application of this membrane filter type is air/gas filtration.
Features:
· Naturally hydrophobic
· Compatible with strong acids and aggressive solutions
· Allowing passage of air even at low differential pressure
· Sterilisation by at 121 ºC or 134ºC or by ethylene oxide
· Extractables with water not detected
Applications:
· Filtration of strong acids and aggressive solutions
· Clarifying corrosive substances, strong acids and alkalis (0.45 µm)
· Clarification of samples and mobile phases of HPLC and GC (0.45 µm)
· Sterilisation of air and gases (0.2 µm)
· Venting applications
· Phase separations
| PORE SIZE (µm) | 0.1 (air), 0.05, 0.1, 0.22, 0.45, 1.0, 3.0, 5.0, 10.0 |
Bubble point minimum value,
wetted with water | 1,2 bar (0,2 µm) | 0,8 bar (0,45 µm) | 0,45 bar (1 µm) | 0,1 bar (5 µm) |
| Flow rates Typical values per cm2 for water at 1 bar (100 kPa) differential pressure: | 0,2 ml/min (0,2 µm) | 0,3 ml/min (0,45 µm) | 1,6 ml/min (1 µm) | 4 ml/min (5 µm) |
| Filter diameter | 13 mm, 25mm, 47mm, 50 mm, 90mm, 142 mm, 293 mm (Other sizes available under request) |
| Material | Polytetrafluoroethylene |
| Thickness average value | Between 150 µm and 250 µm according to different pore size |
| Sterilization | By autoclaving at 121 ºC or 134 ºC and with ethylene oxide |
| Chemical compatibility | Resistant to almost all chemicals (see chemical compatibility table) |
| Extractables | With water none detectable |
| Order information |
| ORDER NUMBER | PORE SIZES (µm) | DIAMETER (mm) | STERILE | QUANTITY/BOX |
| MTF020013H | 0.2 | 13 | NO | 100 |
| MTF020025H | 0.2 | 25 | NO | 100 |
| MTF020047H | 0.2 | 47 | NO | 100 |
| MTF020050H | 0.2 | 50 | NO | 100 |
| MTF020090T | 0.2 | 90 | NO | 25 |
| MTF020142T | 0.2 | 142 | NO | 25 |
| MTF045013H | 0.45 | 13 | NO | 100 |
| MTF045025H | 0.45 | 25 | NO | 100 |
| MTF045047H | 0.45 | 47 | NO | 100 |
| MTF045050H | 0.45 | 50 | NO | 100 |
| MTF045090T | 0.45 | 90 | NO | 25 |
| MTF045142T | 0.45 | 142 | NO | 25 |
| MTF100025H | 1 | 25 | NO | 100 |
| MTF100047H | 1 | 47 | NO | 100 |
| MTF100142T | 1 | 142 | NO | 25 |
| MTF500025H | 5 | 25 | NO | 100 |
| MTF500047H | 5 | 47 | NO | 100 |
| MTF500142T | 5 | 142 | NO | 25 |
| | | | |
To get information about: «MTF PTFE membrane filters» contact us by phone (044) 229 15 31 or fill in the form.