With the development of production technology, self-priming centrifugal pumps are widely used in urban environmental protection, construction, fire protection, chemical, pharmaceutical, power, petroleum, mining and other industries, and their role in production has become increasingly prominent. A good self-priming centrifugal pump can improve production efficiency, help production, save costs, otherwise impede the production, increase the cost of inputs. Therefore, from the full range of self-priming centrifugal pump products to choose a suitable self-priming centrifugal pump is particularly important today Xiaobian share several self-priming centrifugal pump selection points. Self-priming centrifugal pump (Photo from the network) Point one: According to the design flow, the required lift election pump, and consider self-priming centrifugal pump due to wear and tear caused by self-priming centrifugal pump output decreased, according to the calculated head H Multiplied by the coefficient of 1.05 to 1.10 after the election pump; should choose the characteristic curve as the flow increases its lift gradually decreased self-priming centrifugal pump, this pump is stable, work reliably in parallel; and self-priming centrifugal pump operation Points should be maintained in the efficient operation of the interval, so that energy-saving and not easy to damage the mechanical parts. Point two: Frequency control pump (group) design water flow should ensure that the life of the water supply system to meet the maximum design of the second flow requirements. The power supply must be reliable (dual power supply or dual-loop power supply); self-priming centrifugal pump operating point should be selected in the self-priming centrifugal pump characteristic curve (QH curve) efficient working area, and not in the QH curve extension line , The most unfavorable working point of the design should be at the right end point of the high efficiency section of the characteristic curve of the self-priming centrifugal pump, that is, at the intersection of the low point of the high efficiency area of ​​the characteristic curve of the self-priming centrifugal pump and the pipeline characteristic curve. Self-priming centrifugal pump speed range should be set in self-priming centrifugal pump water supply between 25% to 100%. Point three: Select the tank, water tower pump should be reduced to minimize the number of units, should be prepared for use; when a single pump to meet the requirements, it is not appropriate to use more than one parallel mode; If you must use more than one parallel operation or size pump Mode, its model, the number of units should not be too much, generally not more than two models, self-priming centrifugal pump lift range should be similar. Four points: self-priming centrifugal pump life pressurized water supply system should be set up spare pump, spare pump water supply capacity should be greater than the maximum capacity of a self-priming centrifugal pump, self-priming centrifugal pump should automatically switch, alternating run. The above is the self-priming centrifugal pump selection points for consumers to purchase self-priming centrifugal pump reference, the specific selection but also consider their work environment and media conditions. This article is copyrighted industry interconnect (Xiamen) Co., Ltd. All are welcome to reprint, please indicate the source and author of: Asian pumps Network Editor: Yue Lijuan (QQ / micro letter:) starting: http: //beng.liuti .cn / (Service Hotline:)
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