To prepare a solution of urea, pumps are used for circulation, mixing of urea. Urea, carbamide - supplied in granules. For introduction into the soil for plant nutrition, it is applied in a dissolved form with water. For the preparation of a solution of carbamide - urea, stations for the preparation of carbamide, urea, UAN equipped with pumps are used.
Pumps for the preparation and loading of urea must be made of materials resistant to chemical destruction of working surfaces in contact with UAN, urea-ammonia mixture. Circulation pumps for carbamide, urea, UAN pump the solution into a tank or through a heat exchanger for heating water-solution. Since increasing the temperature of the liquid increases the solubility in water.
