Sefiltec ltd. | Sterile filters/membranes

Sterile filters/membranes

Our filter cartridges for tricky and sterile applications are available in various lengths and versions. We differentiate between pleated absolute filter cartridges (down to beta 10,000 – 99.99%) and membranes (Bacterial Challenge Test ASTM F838-05). Sterile filters retain various microorganisms such as Brevundimonas diminuta, Ralstonia pickettii, Lactobacillus brevis, Saccaromyces cerevisiae and Legionella pneumophila, depending on application.

During production, every filter is assigned a batch number and test report so as to guarantee traceability at all times.

Sterile filters/membranes

Membrane materials

Polyether sulphones, PTFE, nylon, nylon 6.6, PVDF or Halar coating (ECTFE)

Filter materials

Polypropylene, polyester and nylon

Supporting shell materials

Polypropylene, polyester, nylon and PFA (solid Teflon)


Membranes: 0.03 – 1.2 µm (Log Reduction Value)/pleated filters: 0.2 – 100 µm


5“ (125mm) – 40“ (1000mm)


O-rings: silicone, Buna-N, EPDM, Viton, PTFE-sheathed Viton or silicone
Gaskets: silicone, Buna-N, EPDM, Viton and PTFE (Teflon)


Integrity test depending on version: Bubble Point/Diffusion Test/Bacterial Challenge Test/Water Intrusion Test/Pressure Drop Test

Special features

Double membranes for longer life time or greater process reliability/solid Teflon filters for aggressive fluids//Validation Guide for product qualification

21 2024 Sterilfilter Membranen