CrossFlow Filtration

CrossFlow Filtration
CrossFlow filtration (tangential flow filtration) involves recirculation of the feed stream pumped across the membrane surface. The "sweeping action" created by fluid flow across the membrane surface promotes consistent productivity over the long term. Tangential flow, which is utilized in ULTRAN^® cassettes, creates a gentle turbulence at the membrane surface, thus minimizing concentration polarization.

In operation the retentate, including molecules and fragments retainted by the membrane, continues through the recirculation path. The solvent and solutes, which passed through the membrane are collected in a reservoir for the so called permeate. To realize a CrossFlow filtration we process our membranes in cassettes, which can be operated in stainless steel filter holders.

ULTRAN^® membrane cassettes are available in a wide range of ultrafiltration (5 - 500 kD) and microfiltration (0.2 - 0.45 µm) pore sizes. To access the range of Whatman CrossFlow filtration systems, please click on the links on the navigation box to the right