Design Institute in the design of equipment, to know the purpose and performance of the pump to choose the right pump. And how do we choose the right pump, pump selection and what are the basis? The following we will study in detail the selection of pumps. Pump selection basis, should be based on process, water supply and drainage requirements, to be considered from five aspects, namely, liquid delivery volume, the device head, the nature of the liquid, piping layout and operating conditions, etc. 1, the flow rate is selected pump important performance data One, it is directly related to the entire plant's production capacity and delivery capacity. Such as the design process can be calculated in the pump normal, minimum, maximum three kinds of flow. Select the pump, based on the maximum flow, taking into account the normal flow, in the absence of maximum flow, usually desirable 1.1 times the normal flow as the maximum flow. 2, the lift system required for installation of the pump is another important performance data, generally to enlarge the 5% -10% head lift to choose. 3, the liquid properties, including the name of the liquid medium, physical properties, chemical properties and other properties, the physical properties of the temperature c density d, viscosity u, medium particle diameter and gas content, etc., which involves the system lift, effective gas Erosion margin calculation and the type of suitable pump: Chemical nature, mainly refers to the liquid medium chemical corrosion and toxicity, is the selection of pump materials and choose an important basis for the type of shaft seal. 4, the installation of piping system conditions refers to the liquid from the height of the liquid into the liquid distance to the suction side such as the lowest level, the highest level of the discharge side of some data and pipe specifications and length, material, pipe specifications, the number , Etc., in order to carry out the Department of combing head calculation and NPSH check. 5, the operating conditions are many, such as the operation of the liquid T saturated steam P, suction side pressure PS (absolute), the discharge side of the tank pressure PZ, altitude, ambient temperature operation is gap or continuous, the pump position is fixed Or removable. Far East Centrifugal Pump Tip: Based on the above pump selection basis, we can easily choose the right pump according to their desired choice. In strict accordance with the pump selection basis, we should note that the selected pump should be as small as possible, the price is cheap, with good characteristics, long life, smooth operation, low operating costs and so on.
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