Depth Filter Cartridgrs

Applications

Depth filter elements are intended for preliminary microfiltration of neutral or aggressive liquid and gaseous media (compatible with the material of construction of the elements) as well as for protection of membrane filter elements (removal of mechanical contaminants, reduction of bioburden). Depth filter elements can be used as final filters, if absolute removal of particles larger in size than a certain value is not required.

Technofilter's depth filters ensure retention of particles 0.5 to 100 μm in size and are produced from fibre materials: polypropylene, glass fibre and cellulose, as well as fine stainless steel meshes. Depending on the nature and thickness of the filter layer, depth filters retain 95 to 99% of all particles whose size exceeds the rating of the filter. The process of filtration takes place mainly inside the filter material and uses mechanisms of mechanical retention as well as adsorption.

In terms of composition and structure, depth filters can be likened to a bulk labyrinth sieve consisting of extremely small cells with very fine and infinitely ramified channels. They form a hollow structure whose volume comprises approximately 70 to 85% of the total volume of the filter, imparting to the filter a high capacity for retention of microparticles.

Various suspensions, colloids and lipids are trapped while moving by the long paths of that labyrinth, the mechanical effect being reinforced by the adsorption effect.

Unlike surface membrane filters, depth filters feature increased dirt holding capacity and extended service life, which makes them indispensable virtually in all process systems involving filtration.

Design

The wall of the hollow cylinder of the filter element is the filtering barrier, consisting of several layers with average pore size increasing from the outside towards the inner layers. This arrangement of filter material enables retention of microparticles across the whole depth of the filtering barrier of the element: larger particles are retained predominantly in outer layers and smaller particles, in the dense deep area of the element. Variable porosity of the filtering barrier results in high dirt holding capacity and long service life of depth elements.

Determination of technical and operating characteristics

Technical and operating characteristics of depth filter elements are determined in accordance with regulations and specifications for the products, Russian and foreign standards and techniques adopted by Technofilter. Depth filter elements are checked for hydraulic resistance (dependence of flux on pressure) and particle retention efficiency. All elements are washed with deionized water to remove organic and mechanical contaminants.

Grade	Removal Rating μm	Filter material	Application	Foto
EPV.STc	0.8 1.0 3.0	Combination of glass, cellulose and polypropylene microfibres	In medicine and biopharmaceutics: for preliminary filtration and clarification of parenteral preparations, antibiotics, serum and blood-based products, cultural, bacterial and fermentative media, biological fluids.
			In beverage industry: for preliminary and final filtration of wines, vodkas, distillery products, non-alcoholic drinks, for fine filtration of process, drinking, mineral and bottled water.
			In other industries: for retention of suspended substances, particles and colloids 0.5 μm or more in size.
EPV.S	0.2 0.5	Glass fibre	In medicine and biopharmaceutics: for reduction of bioload upstream of membrane elements, for fine clarifying filtration of pharmaceutical liquids having a high content of suspended particles, for filtration of viscous liquids, syrups, galena preparations
			In food industry: for preliminary and final filtration of wines, for clarification of coloured distillery products and non-alcoholic drinks, for fine filtration of process, drinking, mineral and bottled water
			In other industries: for retention of suspended substances, microparticles and colloids 0.2 μm or more in size.
EPVg.P	0.2 0.5 0.65 0.8 1.0 1.5 2.0 3.0 5.0 10.0 15.0 20.0 50.0	Increased density filter medium made of polypropylene microfibres	In medicine and biopharmaceutics: for coarse preliminary and fine clarifying filtration of water, fermentative feed solutions, cultural media, serums, parenteral solutions, biological fluids, galena tinctures and extracts.
			in food industry: for prefiltration and final filtration of wines, polishing of vodkas and coloured alcoholic beverages as part of preparation for filling, trap filtration of beer,  filtration of syrups as well as process, drinking, mineral and bottled water.
			In chemical industry: for filtration of solvents, acids and alkalies; in other industries: for retention of suspended substances, particles and colloids 0.2 μm or more in size.
EPV.P	5.0 10.0 15.0 20.0	textured bundled polypropylene string	In medicine and biopharmaceutics: for prefiltration of medicinal preparations and process water (before RO systems), for removal of particles from air and compressed gases.
			In food industry: for prefiltration of distillery products as well as process and drinking water, for removal of particles from air and compressed gases.
			In other industries: for prefiltration to remove particles 5 μm or more in size
EPV.P	1.0 5.0 10.0 20.0	continuous polypropylene fibre that is thermally bonded	In medicine and biopharmaceutics: for prefiltration of medicinal preparations and process water (before RO systems), for removal of particles from air and compressed gases
			In food industry: for prefiltration of distillery products as well as process and drinking water, for removal of particles from air and compressed gases.
			In other industries: for prefiltration to remove particles 1 μm or more in size
EPNS	5.0 10.0 20.0 40.0 70.0	Stainless steel mesh	In medical industry: for prefiltration of viscous solutions, syrups, process water for ampule-washing machines, etc.
			In food industry: for prefiltration of water in various water treatment systems, distillery and cognac beverages, for mechanical cleaning of alkaline solutions and alcohol, for clarification of syrups, oils, honey, etc.
			For prefiltration of hot liquids, highly aggressive and viscous media in various industries
EPNS.P	3.0 5.0 10.0 20.0 40.0 70.0	Stainless steel mesh all-metal construction	For fine filtration of vapour For prefiltration of hot liquids, highly aggressive and viscous media in various industries, For prefiltration of viscous solutions, syrups, process water for ampule-washing machines.

 

Geometrical characteristics of cartridge depth filter elements

All depth filter elements can be produced in the form of capsules