Diaphragm pump diameter choice

The choice of diaphragm pump is very meticulous work, not only must have the solid specialized theory knowledge, but also have rich practical experience.Is a good choice is not only beneficial to adjust the setting of PID parameters of control circuit, the modulated parameters to get better control effect, makes the service life of the diaphragm pump growth greatly.The choice of the diaphragm pump to adjust measures to local conditions, not static, in the process of practice summary and the innovation unceasingly, particularly as the electromechanical integration technology, computer and the application of digital information technology, structure and function of the diaphragm pump has become better and more comprehensive, provides great convenience for choosing diaphragm pump.
The choice of diaphragm pump diameter and determine the main basis of valve flow capacity is Cv.In all kinds of engineering instrument design and type selection, Cv for the diaphragm pump is calculated, and provide the diaphragm pump design specification.From the Cv of diaphragm pump to valve diameter calculation method and general subject to the following steps:
1) determination of calculation flow.The existing production capacity, equipment load and the condition of the medium, decided to calculate flow rate Qmax and Qmin.
2) determination of valve pressure difference before and after.According to the selected valve flow characteristic and system characteristics of the selected S (drag coefficient), and then determine the differential calculation.
3) calculate the Cv.According to the regulation of media to choose the appropriate formula and chart, Cmax and Cmin is obtained.
4) choose Cv.According to the Cmax, the selected standard series of the products in select > Cmax and with its most close to the level of C.
5) the opening of the diaphragm pump checking.General requirements at the time of maximum calculation flow opening ≯ 90%, the smallest calculation flow when opening ≮ 10%.
6) diaphragm pump actual adjustable ratio calculation.Actual adjustable ≮ 10 general requirements.
7) seat diameter and nominal diameter.Verify right after, according to the C.

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