Different kinds of sieving machines Sieving is the process through which unwanted elements are removed from the wanted elements. This surely is a very lose way to describe the process of sieving; because many times this technique is also used to separate particles of various shapes and sizes in order to refine the product. Usually a siever has a net or a mesh in order to screen out the unwanted material.
A sieving machine typically consists of two chambers – one in which the waste/ unwanted materials are collected; another which collects the required material. These machines come in various shapes & sizes and are used depending on the industry of work. Based on their shape and size sieves can be broadly of three types: • Perforated plate sieves: This type of sieve confirms to the ISO 3310 2 and has a diameter range from 200 to 450 millimeters. The perforated plate sieves have square/ round nominal apertures which ranges from 1 millimeter to 125 millimeters. • American standard sieves: They are also known as ASTM sieves, as they conform to the ASTM E11 standard. Unlike the perforated plate sieve, ASTM sieves are available in only 8 and 12 inch diameter sizes. Their nominal aperuture ranges from 20 micrometers to 200 millimeters. • Woven wire mesh sieves: One of the most commonly used sieves, woven wire mesh sieves conform with the ISO 33101. Their