The primary purpose of sanitary filters is to remove any small particulate matter from liquids or gases passing through the filter. When a liquid or gas passes through the screen of the filter, the filter removes all impurities from it. Thus, the liquid or gas finally released by the sanitary filter is free of all contaminants. The prime purpose of sanitary filters is to maintain cleanliness in a facility or wherever they are employed.
The best part about a sanitary filter is that it can be easily dismantled for cleaning purposes. To clean all contact surfaces, disassemble the filter, clean, and once done, assemble it all back. One of the main reasons for the growing popularity of sanitary filters is the fact they are incredibly convenient to use and maintain.
All sanitary filters use media, which can be used to separate particulate matter from gases and liquids. In general, all sanitary filters used in auxiliary services consist of an outlet and inlet housing and an inner perforated screen mesh that effectively removes all impurities. Fluids flow through a filter primarily due to the difference in pressure created inside the filter. Fluids flow from a high-pressure region to a low-pressure region inside the filter, leaving the particulate matter behind.
The underlying technology used in sanitary filters involves the use of a perforated screen mesh to separate the liquid to be cleaned into two separate streams. When this liquid is pumped across the surface, it leads to the development of a positive trans-membrane pressure. This pressure pushes any particulate matter smaller than the size of the porosity of perforated screen mesh to pass through. Any particulate matter that is bigger than the size of the perforations in the screen mesh does not pass through and, thus, is forced to stay behind. The force with which the fluid travels plays a vital role in keeping the perforated mesh screen free of any blockages.
This operating principle of sanitary filters makes it mandatory to ask a few questions while selecting a sanitary filter. What product will be running through the screen? Will the product be gummy, or will it be the particulate matter? What will be the operating pressure inside the filter? Clear answers to these questions will allow you to choose the right sanitary filter for your business.
There are typically four different types of sanitary filters.