Electric diaphragm pump pump inlet diameter selection reference parameters

2019 - 12 - 23

electric diaphragm pump is a new type of pump, in recent years, due to the breakthrough progress has been made on the diaphragm material, to application in petrochemical, ceramics, metallurgy and other industries, is characterized by without irrigation water diversion, self-priming ability. And mechanical transmission medium to be delivered directly to a separate, so the media would never leak outward. No shaft seal and pump itself, greatly extend the service life. Application fields: painting, ceramics in the diaphragm pump has occupies the absolute dominant position; Environmental protection, wastewater treatment, construction, sewage, fine chemical is expanding its market share, and can not be replaced with other pump status. The choice of electric diaphragm water pump diameter and flow capacity of main basis to determine valve Cv. In all kinds of engineering instrument design and type selection, Cv for the diaphragm water pump is calculated, and provide the diaphragm pump design specification. From the Cv of diaphragm water pump to valve diameter calculation method and general subject to the following steps: 1, the 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, the determination of pressure difference before and after the valve. According to the selected valve flow characteristic and system characteristics of the selected S ( Drag coefficient) And 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, standard series of the products in their choice selection & gt; 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, electric diaphragm pump actual adjustable ratio calculation. Actual adjustable ≮ 10 general requirements. 7, the determination of the seat diameter and nominal diameter. Verify right after, according to the C.

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