Cutting Flat Sheet Membranes

Sterlitech offers a wide selection of membranes that have been pre-cut for use with our Sepa CF II Cells, CF042 Crossflow Cells, and HP4750 Stirred Cells.  However, if you want to cut your own membranes for use with any of these systems, you can follow the simple instructions below. HP4750: For this procedure you will need the following materials: a template (the porous stainless support disk works well for this), the membrane you want to cut, scissors, and a pair of latex gloves. 1. Take your template and place the membrane you want to cut against it.  Be sure to have latex gloves on to avoid contaminating the membrane surface. 2. Cut along the edge of the template with the scissors.  Hold the scissors at an angle towards the center of the template to avoid under-trimming.

Once finished, the membrane should sit perfectly flat on supports without any bending and extend outside of the inner O-ring to avoid leakage.

Sepa CF II Cell/CF042: To cut membranes for the Sepa CF II or CF042, we like to use a steel die to give a perfect fit for those crossflow cells.  The video below illustrates how membranes are cut with a steel die.