The polyethersulphone (PES) is a very interesting material at the ultra cleaning and sterilization of aqueous and biological samples, because of its high flow rate with low pressure. Also, its chemical compatibility is very good.
They are available in a sterile format and non sterile format and in 13 and 25 mm of diameter. Membranes of 0.1, 0.22 and 0.45 μm.

Bubble point with water (minimum value)
0.1 µm 2.0 bar | 200 Kpa (alcohol)
0.22 µm 3.5 bar | 350 Kpa
0.45 µm 2.2 bar | 220 Kpa
Flow rate with water (ml/min /cm2)p=0.7 bar | 70 Kpa aprox.:
0.1 µm 5 ml/min/cm2
0.22 µm 10 ml/min/cm2
0.45 µm 25 ml/min/cm2

Thickness: 0.110 – 0.130 mm
Materials
Membrane: Polyethersulphone (PES)
Housing: Polypropylene (PP)
Diameters: 13, 25 mm.
Filtration area
13 mm diameter: 0.92 cm2 25 mm diameter: 2.98 cm2 Maximum temperature of use ≤ 90ºC
Maximum pressure of work: 8.7 psi
Connectors
Inlet: Female luer lock
Outlet: Male luer slip
Hold-up volume
13 mm diameter: < 20 µl
25 mm diameter: < 100 µl
Extractables with water < 0.2%
Chemical compatibility: 1 – 14 pH
Reaction to water: hydrophilic
Absorption: non specifically low absorption in proteins