Three-hole filter*

　　A filter is an indispensable device on the pipeline of the conveying medium, usually installed at the inlet of pressure reducing valves, pressure relief valves, constant water level valves, square filters, and other equipment. The filter consists of a cylinder, stainless steel filter mesh, sewage discharge part, transmission device, and electrical control part. The water to be treated passes through the filter cartridge of the filter mesh, where impurities are blocked. When cleaning is needed, the removable filter cartridge can be taken out, treated, and reinstalled, making maintenance very convenient. During operation, the water to be filtered enters through the water inlet, flows through the filter mesh, and then enters the user's required pipeline for process circulation through the outlet. Particulate impurities in the water are trapped inside the filter mesh. As this cycle continues, the trapped particles increase, the filtration speed slows down, and the incoming sewage continues to flow in, causing the filter pores to become smaller. This creates a pressure difference between the inlet and outlet. When the pressure difference reaches a set value, the differential pressure transmitter sends an electrical signal to the controller. The control system starts the drive motor to rotate the shaft through the transmission assembly, while the sewage outlet opens to discharge waste. After the filter mesh is cleaned and the pressure difference drops to the minimum value, the system returns to the initial filtering state and operates normally.