Disposable and reusable tangential | crossflow cassettes for concentration, diafiltration and buffer exchange of biological samples and nanoparticles from 0.1 – 5 l with MWCOs from 3 kDa to 1,000 kDa. Available with PES and Hydrosart® ultrafiltration membranes, Vivaflow 50, Vivaflow 50R, and Vivaflow 200 are the only dedicated laboratory crossflow cassettes in the market. Our tangential | crossflow concentrators are simple to set up and can be operated with any laboratory pump with flow rates of 200 - 400 ml/min.