„Reliable Filtration“ is HOBRA’s comprehensive mark under which all the company’s products and services in liquid filtration are identified. It is a marketing project which covers everything HOBRA manufactures, offers and supplies in this sphere.
Depth filter sheets are made of carefully selected and inspected materials that are harmless to health, especially from various types of cellulose, high quality kieselguhr, perlites and resins. Filter sheet is in principle a three-dimensional depth filter that is characterized by the presence of adsorbents, compounds with a large internal surface. Hobrafilt® depth filter sheet of the “C” series is a filtration medium with a high purity that ensures extremely low amount of metal ion extracts (e.g., calcium) during the filtration process.
Hobrafilt® of the “C” series are depth filter sheets intended for demanding filtration of fine distillates, such as cognac, brandy, whiskey, etc., as well as for fruit distillates, such as plum brandy, Grappa, Chacha, and others. Excellent results are achieved also during vodka filtration. These special sheets can also be used in the production of pharmacy, biotechnology, herb extracts, as well as in other fields. The product series of filter sheets Hobrafilt® “C” offers a wide selection of flow capacities and retention that ensures exact fit for the given type of filtration.
Documents to download:
Product leaflet HOBRAFILT - „C“ Series (313.5KB, .PDF)
A filtersheet is essentially a three-dimensional, deep filter consisting of adsorbents of a large inner surface. This can be imagined as a labyrinth of little chambers and channels of different lengths inside the sheet where dirt is captured.
Contrary to screen filtration, the presence of adsorbents in a deep filtersheet will multiply the total filtration area and, thereby, increase the quantity of the solution being filtered.
Three different filtration types as specified below are applied in the filtration process over filtersheets. In practice, normally, none of the three filtration mechanisms occurs separately during filtration due to the wide range of particle size but they are more or less combined, which is decisive for the filtration result.
HOBRAFILT filter sheets are delivered in the format 20x20, 40x40 and 60x61,4 cm. Based on customer requirements are also supplied other dimensions, such as circular or sheets with various holes, etc.
Documents to download:
HOBRAFILT - Depth filter sheets (2.5MB, .PDF)
Hobrafilt instructions with differential pressure specification (670.8KB, .PDF)
CONDITIONS FOR SUCCESSFUL FILTRATION using HOBRAFILT filtersheets of the „N“ and „NT“ Series (563.7KB, .PDF)