A part of Merck

Módulos en espiral de ultrafiltración Helicon SS50

Spiral-wound ultrafiltration membrane cartridges designed for the concentration and desalting of aqueous solutions of macromolecules.



Información para pedidos


    Licencias necesarias e Información técnica

    Protein Concentration and Diafiltration by Tangential Flow Filtration -- An Overview

    Preguntas frecuentes

    Are the TFF membranes autoclavable or steam sterilizable? The membranes for Pellicon XL, Helicon UF, Helicon RO, spiral wound/prep/scale, Prostak UF and Pellicon 2 are not autoclavable or steam sterilizable. However, a chemical sanitization can be done; refer to the maintenance manual for these membranes.

    Note: Prostak Open Channel with microporous Durapore membranes can be steam sterilized.
    What is Normalized Water Permeability? NWP is a measure of the ability of pure water to pass through the filter membrane. NWP is a property of the TFF system and is contributed to by the membrane as well as the feed and permeate flow paths in the filter.
    How is NWP measured? NWP is measured by filtering pure water throught he system at controlled cross flow, Trans Membrane Pressure and temperature. The filtrate flow rate is measured. The flow rate is normalized to the membrane area, TMP and temperature.

    Please refer to the operator's manual or contact Techical Service for further questions regarding the calculation of NWP.
    How does NWP aid in effective cleaning procedure development? Fouling and polarization leave residues on the membrane that can reduce filter permeability. Effective cleaning removes these residues, restoring the permeability of the membrane. Ideally, NWP after cleaning should equal NWP before use although there can be variation up to +/-15% due to membrane compaction under pressure and measurement error.

    NWP validates the ability of cleaning to restore filtration rate of a system.

    Manuales del usuario

    Helicon-SS50 Cartridges Installation Guide