How to Optimize the Choise of Filtering Media for Liquid Filtration Applications
Filtration is one of the most broadly spread operation in industrial workshops processing products is a liquid phase and on machines using a liquid as an ancillary working tool or as a source of energy.
Among other solid-liquid separation techniques, i.e. centrifugation, settling, flotation and cycloning, filtration is the most versatile one. Its possible equipments and operation principles are so different that most of problems can be solved by a filter, whatever the scope of the separation: either to recover the solid phase from a solid liquid mixture or to give the liquid a given degree of clarification or a specified suspended solid concentration.
The filtering media plays the key role in a filter. To satisfy the requirements of both the separation process and the technology, a great variety of media has been developed. Their choice is a difficult task: first all above requirements cannot always be stated or quantified what means that the user’s needs are sometimes unknown in their whole. Second the ability for use in each specific condition of each existing media can hardly be determined for technical and cost reasons.
Tests have thus to be performed in laboratory conditions to simulate as faithfully as possible actual field operating conditions so as to quantify the properties of the media in relation with the function they will have to full fill.
Each professional sector then creates its own test methods and standardization is a way of simplifying and clarifying disclaim of the media characteristics.
This Article in Chinese 
This Article in French