„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.
HOBRAFILT deep filtersheets of the “N” series are produced of special types of high-quality cellulose fibres, diatomaceous earth and perlite, which form a three-dimensional, deep filter of a large inner surface.
“N”-series filtersheets can be used in all common applications in industries such as beverages, chemicals and pharmaceuticals, biotechnological applications and cosmetics.
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)