Pall manufactures different membrane filters for gas filtration. We use either Polytetrafluoroethylene (PTFE) filter membrane or Polyvinylidene Fluoride (PVDF) modified, for such a purpose.
In our Pall Allegro™ single-use systems, the method to sterilize these systems is by gamma irradiation.
The Polytetrafluoroethylene (PTFE) filter membrane, is incompatible with gamma irradiation, so it could not be used as a gas filter in our Single-Use Systems.
The Polyvinylidene Fluoride (PVDF) modified is compatible with gamma irradiation and for this reason is the device to be used with our Single-Use-Systems.
Pall Emflon II V002 sterilizing grade filters uses a filter membrane made of polyvinylidene difluoride (PVDF).