Screen sheet specifications divided by diameter sieve with sieve No. chip, said chip screen sieve diameter multiplied by the number 10. Divided into 8,10,12,15,20,25,30,40,50,60,80. For example, sieve diameter 3mm, length film screening 680mm, width 396mm film screening, then marked as 30-680 × 396 SB / T 10119.

Screen sheet opening rate and the ability to sift through the films screened openings rate refers to the total area of chip sieve screen surface area of the total percentage of the opening film screening rate, the greater the productive capacity of shredders. Openings rate increased in two ways: First, increase the sieve diameter, center distance of one narrow sieve. The former will feed products increased particle size, uniformity reduced, which will weaken the intensity of screening films. Actual production, the sieve size is the diameter of the object by the feeding decision, and therefore screening of films to choose, we should first meet the size requirements of the product, according to intensity of re-screening films selected as far as possible, large-aperture sieve films, in order to improve crushing efficiency, conservation energy consumption.