competence in filtration
Haldenstrasse 11
CH-8181 Höri
+41 (0)43 411 44 77 

Sterile filters/membranes

MembranenOur 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.

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) 

226 (bayonet with point/without point)/222 (plug-in connection with point/without point)
DOE (ends open at both sides)/SOE (ends open at one side with internal O-ring)/etc.  

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