A filter is an indispensable device in pipelines transporting media, typically installed at the inlet end of pressure reducing valves, pressure relief valves, level control valves, and other equipment. A filter consists of a cylinder, a stainless steel filter screen, a drain section, a transmission device, and an electrical control system. When water to be treated passes through the filter cylinder, impurities are blocked. Cleaning is simple; just remove the removable filter cylinder, clean it, and reinstall it. Therefore, use and maintenance are extremely convenient.
During operation, the water to be filtered enters through the inlet, flows through the filter screen, and exits through the outlet into the user's required pipeline for process circulation. Particulate impurities in the water are trapped inside the filter screen. This continuous cycle traps more and more particles, slowing the filtration speed, while the incoming wastewater continues to flow in, causing the filter pores to become smaller and 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 then starts the drive motor, which rotates the shaft via the transmission assembly. Simultaneously, the drain port opens, allowing wastewater to drain out. Once the filter screen is cleaned, the pressure difference drops to its minimum, and the system returns to its initial filtration state, resuming normal operation.
The filter consists of a housing, multiple filter elements, a backwashing mechanism, and a differential pressure controller. A transverse partition inside the housing divides its interior into upper and lower chambers. The upper chamber contains multiple filter elements, maximizing filtration space and significantly reducing the filter's volume. The lower chamber houses a backwash suction cup. During operation, turbid liquid enters the lower chamber of the filter through the inlet and then flows through the partition holes into the inner chamber of the filter elements. Impurities larger than the filter element slits are trapped, while the clean liquid passes through the slits to reach the upper chamber and finally exits through the outlet. The filter uses a high-strength wedge-shaped filter screen, and the filter element is automatically cleaned through differential pressure control and timed control.
