Filter Holders

Vacuum filtration
is used primarily in microbiological and analytical procedures that involve collecting a particulate(bacteria, precipitate, etc.) from a liquid suspension. Liquid poured into a funnel passes through a filter, which retains the particulate, and filtrate can be collected into a filter flask, directly or via a vacuum manifold. Applying vacuum reduces process time compared to gravity flow. Micropore supplies a wide range of vacuum filter holders and accessories. Select from glass, polysulfone, or stainless steel assemblies with funnels holding from 15 to 1000 mL.
Pressure type filter holders
can be used for ultracleaning or sterilizing liquids and gases. Micropore holders have been designed to maximize flow rates and to minimize holder resistance and can be used in either batch or continuous filtration procedures. Advantages of Pressure Filtration • Higher differential pressures are possible, resulting in higher flow rates. The pressure differential across the membrane is not limited to atmospheric pressure (>14.7 psi) • Unintentional contamination downstream of the membrane is minimized • Denaturation of proteins and other biological polymers due to foaming downstream of the membrane is avoided • Vapor accumulation and possible explosion can be avoided using an inert gas to pressurize solvents and combustible or flammable liquids