For the filter performance test bed, which must be strictly cleaned prior to testing, the test system and the contamination injection system serving the test system are equipped with a filter, where the filter and the tested Filter is two things, its accuracy requirements, dirt capacity requirements than the filter to be tested with high precision, the difference between the same test system in the two types of filters, this filter is called the test bed filter, The test filter is called the subject filter.
The general principles of filter selection:
1, the import and export of diameter:
In principle, the import and export of filter diameter should not be less than the matching pump inlet diameter, generally consistent with the inlet pipe diameter.
2, the nominal pressure:
Determine the pressure rating of the filter according to the maximum pressure that may occur with the filter line.
3, the choice of hole number:
The main consideration to be intercepted impurity particle size, according to process requirements of the media process. A variety of wire mesh size can be intercepted check the following table “filter specifications.”
4, the filter material:
The material of the filter is generally the same as the material of the connected process piping. For different service conditions, it is advisable to select a filter made of cast iron, carbon steel, low alloy steel or stainless steel.
5, filter resistance loss calculation
Water filter, in the general calculation of the rated flow rate, the pressure loss of 0.52 ~ 1.2kpa
