Nov 26, 2013 · Maximum Operating Temperature GHP Membrane: 55 ºC (131 ºF) PVDF, TF (PTFE), and Nylaflo Membranes: 100 ºC (212 ºF) Minimum Bubble Point – Water GHP Membrane 0.2 μm: 2.9 bar (290 kPa, 42 psi) 0.45 μm: 1.38 bar (138 kPa, 20 psi) PVDF Membrane 0.2 μm: 2.3 bar (230 kPa, 34 psi) 0.45 μm: 1.1 bar (110 kPa, 16 psi) Nylaflo Membrane