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Endecotts provide all the equipment necessary to perform the seven steps of meaningful particle size analysis using sieves. It is important to consider not only the sieving process itself but also taking a representative sample, ensuring repeatability of your sieving test, evaluation of your result, the proper cleaning of the sieves, together with checks to ensure that your sieves are compliant.
Perhaps the biggest advantage of test sieving is that it so frequently happens to be the only suitable method of size analysis for a particular purpose. However, even when there is a choice of method, test sieving generally proves to be the most convenient one. It is a quick and reliable method of size analysis, equally suited to accurate scientific research work or routine analysis under industrial conditions. Tests can be performed at almost any location.
No complicated apparatus is demanded. A nest of sieves and a simple laboratory balance will suffice in most cases. In fact, rapid size checks can often be made on-site at a particular plant with the aid of a rough pair of scales.
The technique of test sieving is basically simple. No specialised knowledge or skill is needed; care and diligence are the main requirements. Process operators can easily be trained to carry out sieve tests.
When the size distribution of a sample has been determined by test sieving, the material becomes separated into several fractions. This is another important attribute. These fractions are not contaminated, nor have their chemical or physical properties been altered. They are, therefore, available for further inspection or independent analysis if required.
The above testing procedure of sieving by hand can be tedious and the accuracy of the method may also depend to a considerable extent on the operator who performs the test. In machine sieving most of the burden is removed from the operator, and once the optimum conditions have been determined, reproducible results are rapidly obtained.
For example, the nest of sieves may be shaken for a certain predetermined time e.g. 5 mins and amplitude e.g. 1.5 mm. This ensures that results from different labs can be compared with quite a degree of accuracy.
Whether you are looking for test sieves or sieve shakers, Endecotts offer the world’s finest equipment.
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