1. Filtration accuracy: Filtration accuracy refers to the ability of filter materials to filter out particles of different sizes.The filtration accuracy is high, and the life of the filter element is short.2. Pollution holding capacity The pollution holding capacity refers to the weight of the particulate pollution that a unit area of ​​the filter material can hold when the pressure drop of the filter material reaches the specified value during the test.The filter element hole is susceptible to the accumulation of particulate pollutants through the channel, which increases the pressure difference. When the pressure difference reaches the specified value, the service life ends.The direct parameter reflection of the end of life of the filter element is that the pressure difference between the upstream and downstream of the filter element has reached the pressure at which the bypass valve is opened. At this time, the dirt holding capacity of the filter element has also reached a large value. Ability, that is, to increase the life of the filter element.