OPTIMUM TIME PERIOD OF EFFICIENT OPERATION OF MILKING LINER

The Republic of Belarus is the European leader in production of milk and dairy products. Milk-commodity farms and complexes use milking plants of domestic and foreign manufacturers. One of the most important items of any milking plant is milking liner, since the amount of milk received, health of animals and quality of milk depend on it largely. The new milking liner is of a high elasticity, flexibility, etc., providing efficient nipple massage, udder stimulation and intensive milk production. At prolonged operation of milking liner, it increases in length, the physical and mechanical properties vary, and numerous tiny cracks are formed on the inner surface which negatively affects automated milking process and leads to cow udder diseases. The paper shows that the milking liner should not affect the milk flow from the udder and at the same time should tightly fit the nipples above the sphincter area in order to protect them from damage by vacuum during vacuum phase and completely block vacuum on nipples at compression stroke to restore normal blood circulation in nipples. Flexibility (elasticity and rigidity) and elongation should be the main parameters of milking liner to perform these functions and requirements. The researches determined efficient service life periods of the most common in our country milking liner brand DD.00.041 depending on its properties variability, which should be determined in the number of milking operations.

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