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Pump selection based on
作者: 发布于:2011/10/13 12:32:53 点击量:

    Pump selection basis, should be based on process flow, water supply and drainage requirements, from the five aspects to be considered, both the volume of liquid delivery head, liquid properties, device, layout and operation of pipeline operating conditions

    In 1, the flow is selected submersible pump is one of important performance data, it is directly related to the entire device capacity and transmission capacity. Such as process design and design of pump is able to calculate the normal, minimum, maximum of three flow. Selection of pump, the maximum flow as the basis, take into account normal flow, in the absence of maximum flow, it is usually preferable to 1.1 times the normal flow of traffic as the largest.

    2, installation of lift systems are another important election of pump performance data, the general use of zoom 5% - 10% margin to lift after the selection.

    In 3, the liquid properties, including liquid medium name, physical properties, chemical properties and other properties, physical properties are temperature c d u density, viscosity, solid medium particle diameter and gas content and so on, which relates to a system of lift, effective cavitation margin calculation and suitable pump types : chemical properties, mainly refers to the liquid medium chemical corrosive and toxic materials and selection of pump selection, is that one kind of the important basis of shaft seal type.

    4, pipeline installation system refers to the arrangement of conditions of feeding liquid height of fluid delivery distance sending fluid to suction side, such as minimum level, the highest water level discharge side of some data and specifications and the length of pipe material, pipe, specifications, quantity, in order to carry out the system comb head calculation and NPSH check.

   In 5, the contents of many operating conditions, such as liquid saturated steam power operation T P, the suction side pressure PS ( absolute ), pressure from the container side PZ, altitude, ambient temperature operation is a gap or continuous, the location of the pump is fixed or movable.