Tray opening ratio

The porosity refers to the effective area of the sieve surface, that is, the percentage of the effective screening area on the sieve surface relative to the total area of the sieve pores. The calculation formula is as follows: K = A2/A1 × 100% Where: K represents the open area percentage (%); A2 is the effective screening area (in m2); A1 is the total area of the sieve pores (in m2). The higher the open area percentage, the more opportunities there are for the material to pass through the sieve, and thus the higher the screening efficiency. A reasonable arrangement of sieve pores can reduce the spacing between them, increase the total area of the sieve pores, and raise the porosity. 　　There are two methods for arranging circular sieve pores: square arrangement and triangular arrangement. Through calculations, it turns out that when the size of the sieve pores is the same, the triangular arrangement is superior to the square arrangement; it offers a higher porosity rate and ensures uniform strength in all directions across the sieve surface.