World population has gradually increased and, as the result of this increase, cultivation areas of grain group which is one of the basic requirements of human have been expanded. As parallel with this expansion the grain group should be stored for short and long term. Since the grain group is not in pure situation within the place stored after harvesting, it should be cleaned from foreign matters i.e. from grass, stones and sands.
While screening process made manually in sieves continued day after day in the past, the systems which sieve tons of grain per hour have been developed thanks to state-of- the-art technology nowadays. The name of this unit is pre-cleaning unit. Preclearing consists of 5 main components as of its general structure. Drum case, drum, upper chamber. It has high resistance against corrosion.
10,9quality class bolts have been used as fastening element. Bolts ant nuts are dacromate plated and have high yield strength. St 37 quality black sheet has been used for cyclone and its parts have been joined by means of welding. In order to increase resistance against corrosion, 2 coats of primer have been applied and 1 coat of paint has been applied over primer.
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