MUNKTELL HYDROPHOBIC PTFE MEMBRANE FILTERS
PTFE membrane filters are permanently hydrophobic by their composition. They allow the passage of air
and gases and do not get clogged up by humidity.
When intended for the filtration of aqueous solutions, they need to be wetted with ethanol or methanol
prior to use in order to permit water penetration.
PTFE membrane filters are ideal for venting applications, phase separations, aerosol collection and gas filtration.
PTFE membrane filters offer an excellent chemical compatibility so that they can be used even for those
solvents and acids which other filter types are not resistant against.
SPECIFICATION FOR HYDROPHOBIC PTFE MEMBRANE FILTERS
Adsorption: 8 μg/cm2 for g-globuline for pore size 0.2 μm.
Bubble Point (minimum value for the 0.2 μm membrane and average values for all other porosities,
treated in all cases with isopropanol):
0.2 μm . . . . . . . . . . . . . 1.2 bar 1.2 μm . . . . . . . . . . . . . . . 0.45 bar
0.45 μm . . . . . . . . . . . . . 0.8 bar 5.0 μm . . . . . . . . . . . . . . . 0.1 bar
Flow Rates (average values per cm2 with air and △ p = 0.05 bar):
0.2 μm . . . . . . . . . . . . . 0.2 l/min 1.2 μm . . . . . . . . . . . . . . . 1.6 l/min
0.45 μm . . . . . . . . . . . . . 0.3 l/min 5.0 μm . . . . . . . . . . . . . . . 4 l/min
Compatibility:
compatible with most solvents. See compatibility table.
Extractable Substances (with water):
none detected
Sterilization:
Autoclave (121° C oder 134° C), with ethylene oxide.
Thickness:
varies acc. to pore size, between 65 μm (0.2 μm) and 100 μm (5.0 μm).
Validation:
Sterilization Capability of 0.2 μm membrane filter has been verified with
the BCT (Bacteria Challenge Test.
