Crossflow filter units Vivaflow 20 / 500. Thin channel crossflow filter units with 50cm? / 200cm? filter areas for capacities between 100ml / 500ml and 5L. This system provides high crossflow rates at minimum pumping pressure and does not require additional fittings for scale up. VivaFlow 50 is easy to operate with a flow restrictor and optionally a pressure indicator. Modular construction with luer connections allows interlocking of units in series for easy scale up. Recovery rates are maximised due to optimised recirculation volume and by use of low adsorption materials. Disposable. For greater volumes VivaFlow 200 is available with a filter area of 200cm? and includes pressure indicator flow restrictor filtrate tubing and connectors. Membrane: polyethersulphone.