Filtration for the removal of suspended particles from the range of 0.2 mm to 100 or 150 mm is generally known as micro filtration or cartridge filter. This is pressure filter in line as shown in the picture.
Pressurized fluid comes in to the housing and due to pressure, passing from the cartridge, where actual filtration takes place and contamination retain on/over the cartidges and clear fluid comes out from the center of the cartridge. This is out to in system.
One needs to monitor the filter by pressure difference (ΔP – the difference inlet pressure and outlet pressure). Initially, when cartridge is clean, clean pressure drop will be minimum and as it got contaminated, pressure drop will increase gradually. At 2.5 or 3 Kg/cm2 g pressure drop, one needs to change the cartridge in case of disposable cartridge.
If the flow rate is more, we need to give number of cartridges in one housing as shown here.