Abstract
In this paper, the characteristics of a two-way ball valve orifice are researched. By means of modeling and analyzing of the trajectory of valve opening angle, a conclusion was drawn that there was trigonometric function relationship between the orifice area and opening angle of a ball valve. Based on this, the bench tests are conducted with the spraying system with 6 nozzles. It can be seen that there is a good agreement between prediction model established and experiment by the method of border points checking, the absolute error is in the range of 0~0.002mm2. With further research, there is a marked logarithmic relationship between the orifice area of a ball valve and flow of the sprayer, the correlation coefficient is 0.9952.
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