Sieve

A sieve is a separation device that classifies solid particles by size using a woven mesh or perforated plate with calibrated openings. In laboratory practice, sieving defines particle-size distributions (PSD) for feed control, quality assurance, and process design. Industrially, sieves are also used for pre-screening to protect downstream filters from oversize particles. The key parameters are mesh count, wire diameter, open area, and aperture tolerance; the ratio between particle size and aperture determines separation sharpness and throughput. Stainless-steel woven meshes dominate for durability, while polymeric or hybrid sieves serve corrosive or lightweight duties. Proper cleaning and calibration are essential, as aperture deformation or blinding alters cut-off accuracy. For reliable results, sieving procedures follow standards such as ISO 3310 or ASTM E11 and employ representative sampling and controlled vibration energy to avoid agglomerate break-up or particle attrition.