The size of the outer diameter of the filter cartridge during the design process is larger than the inner diameter of the filter cartridge by more than 10mm, which is mainly because of the high and narrow space, and the particles in the five days before use can be outside the cartridge. The layer settles slowly so that the cartridge is uniformly accepted from the top down.
The determination of the diameter of the inner skeleton of the filter cartridge The main consideration of the size of the oil hole should not affect the amount of filtered air, but also to take care of the impact of the size of the small hole on the strength of the skeleton. The total internal skeleton strength is of utmost importance. First of all, consider that the differential pressure on the filter cartridge must be supported by the skeleton, so the smaller the diameter, the higher the strength.
The filter cartridge is to some extent fully left room for the differential pressure limit. When the required filtration is calculated, the area should be increased by a factor of two. This is because dust pollution is unpredictable in consideration of practical work.
There are two types of filter media for filter cartridges: one is a synthetic fiber filter, and the other is a paper filter. Synthetic fiber nonwoven filter. According to the processing technology, it can be divided into continuous fiber spunbonded polyester hot press and short fiber spunbonded polyester hot press. When the surface of the filter material is waterproof, the infiltration angle of the filter material after the waterproof treatment should be greater than 90°, and the dipping water level should not be lower than Class IV.
During the production of the filter cartridge, when the filter media is used for anti-oil treatment, the filter media is treated with anti-oil treatment. Polyester nonwoven filters can withstand operating temperatures no lower than 120°C. For other special conditions such as high temperature and humidity, the selection of filter cartridge material structure should meet the application requirements.