The vacuum filter forms a negative pressure at the filtrate outlet as a driving force for filtration. This filter is divided into two kinds of intermittent operation and continuous operation. Intermittently operated vacuum filters can filter suspensions of various concentrations. Continuously operated vacuum filters are suitable for filtering thick suspensions containing more solid particles.
It is mainly suitable for vacuum filtration in the production process of chemical medicine, petroleum and other industries. It has the advantages of light weight, easy installation and maintenance, and simple operation. Vacuum filters include vacuum negative pressure filters. There are two types of vacuum negative pressure filters. One uses porous glass as a filter membrane support pad. It can ensure that the trapped particles are evenly distributed on the surface of the filter membrane, so it is particularly suitable for particulate matter. Collection and counting. The other uses a PTFE-coated stainless steel screen as a membrane support pad, which is suitable for collecting filtrate, such as removing particles from samples. When filtering viscous liquids (such as when collecting particles from oil samples), it is also recommended to use this type of filter, which is easier to clean.