Metafilter

filtration ,construction ,principle ,working cartridge Of Metafiltter

1. METAFILTER By – Vikas Kumar Prajapati B. Pharm IIIrd sem Bansal College of Pharmacy

2. PRINCIPLE METAFILTER functions as strainer (surface filtration) for the separation of particles. In this method, metal rings contain semicircular projections, which are arranged as a nest to form channels on the edges.

3. CONSTRUCTION Construction and assembly of meta filter is shown in the figure.

4. Metafilter consist of a series of metal rings. These are threaded so that a channel is formed on the edges. It consists a grooved drainage column on which a series of metal rings are packed. These rings are usually made of stainless steel have dimensions of about 15.0 mm internal diameter and 22.0 mm external diameter. Each metal rings has a number of semi circular projection (0.8mm in thickness) on one side of surface. The projections are arranged the same way up. These rings tightened on the drainage column with a nut. Metafilers are also known as EDGE FILTERS.

5. Working These filters placed in a vessel and may be operated by pumping the slurry under pressure or occasionally by application of reduced pressure to the outlet side. The slurry passes through the channels formed on the edges between the rings. The clear liquid rises up and collected from outlet into the receiver. For the separation of fine particles, a bed of suitable material such as kieselguhr is first built up. The pack of rings serves essentially as a base on which the true filter medium is supported.

6. UseS For clarification of syrups. Filteration of injection solutions. Clarification of insulin liquors

7. Advantages Can be used under high pressure , without any danger of bursting the filter medium. Running costs are low. It can be made up of material resistant to corrosion to avoid contamination of preparations. It an extremely versatile filter. Sterile products can be handled.

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