Carbon steel Y-shaped filter is an indispensable device on the transmission medium pipeline, usually installed at the inlet end of pressure reducing valves, relief valves, constant water level valves or other equipment to eliminate impurities in the medium and protect the normal use of valves and equipment. When the fluid enters the filter cartridge with a certain specification filter, its impurities are blocked, and the clean filtrate is discharged from the filter outlet. When cleaning is needed, simply remove the detachable filter cartridge, process it, and reinstall it. Therefore, it is extremely convenient to use and maintain.