1. Inlet and outlet channels: In principle, the inlet and outlet channels of the primary filter should not be smaller than the inlet and outlet channels of the matching pump, and generally have the same diameter as the inlet pipeline.
2. Nominal pressure: Determine the initial pressure level of the filter based on the maximum pressure that may occur in the filtering pipeline.
3. The selection of pore size: mainly considers the particle size of impurities that need to be truncated, depending on the requirements of the medium process. Various sizes of silk screens can be used to filter the particle size survey.
4. The material of the primary effect filter: The material of the primary effect filter is generally the same as the material of the connected process pipeline. It can be considered to choose a primary effect filter made of cast iron, carbon steel, low alloy steel, or stainless steel.
5. Calculation of resistance loss of primary filter: For water using primary filter, the rated flow rate is generally calculated, and the pressure loss is 0.52~1.2kpa.