Vacuum filters are used between suction cups and vacuum generators (or vacuum valves) to collect contaminants (mainly dust) drawn in from the atmosphere to prevent system contamination. Mufflers should be installed at the exhaust port of the vacuum generator, the suction port (or exhaust port) of the vacuum valve and the exhaust port of the vacuum pump.
The vacuum filter is to form a negative pressure at the outlet of the filtrate as the driving force for filtration. This filter is divided into intermittent operation and continuous operation. The intermittently operated vacuum filter can filter suspensions of various concentrations, and the continuously operated vacuum filter is suitable for filtering thick suspensions containing more solid particles.
It is mainly suitable for vacuum filtration in the production process of chemical, pharmaceutical, petroleum and other industries. It has the advantages of lightweight, convenient installation and maintenance, and simple operation. Industrial vacuum filters include vacuum positive pressure filter, vacuum negative pressure filter has two types, one uses porous glass as a filter membrane support pad, which can ensure that the retained particles are evenly distributed on the surface of the filter membrane, so it is especially suitable for particulate matter. collection and counting. The other uses a PTFE-coated stainless steel mesh as a membrane support pad, suitable for collecting filtrate, such as sample de-particle removal. This type of filter is also recommended when filtering more viscous liquids (such as when collecting particles from oil samples), which is easier to clean.
When installing the vacuum filter, pay attention that the inlet and outlet should not be installed backward. There must be no leakage at the piping. During maintenance, the seals must not be damaged. The inlet pressure of the filter vacuum should not exceed 0.5MPa, which can be ensured by adjusting the pressure-reducing valve and the throttle valve. The flow rate of the vacuum filter is not large, and the moisture in the air will not condense, so the filter does not need to have a water separation function. Do not replace the ZF series filter with the AF series filter to avoid performance deterioration.