Filtration is a comprehensive technical process that achieves solid-liquid or solid-gas separation through the pores of the filter media and the participation of filtration equipment. Due to the diversity of applications and application purposes, the starting point and purpose of the filtration effect are more complicated, both the total effect of solid-liquid or solid-gas separation, and the size and the amount of solid particles retained by the quilt. The size of the solid particles contained in the clarifying effect of the filtrate, and the like, can be used to show the effect of filtration in a simple relationship.
The nominal filter (nominal filtration accuracy) level is the particle size of the small particles that can be retained by the filter media on a certain filter device, the size of the large particles entering the filtrate, or the filtration capacity of the filter media or filter to different sizes of particles. . They can specify a nominal filtration level for a given concentration of suspension system at 90% (and 95%, 98%) cut-off mass under specific test conditions.
The American Fluid Dynamics Research Center defines a particle size that is 99% filtration efficiency for filtration grades and a corresponding filtration rate of 95% for nominal particle filtration (nominal filtration accuracy).https://www.inocofiltration.com/