Pipeline pump selection basis, should be in accordance with the process, water supply and drainage, from five aspects to be considered, both the liquid delivery, removal lift, the nature of the liquid, piping and control the operating conditions and so on. 1 flow is one of the important performance data of the pipeline pump selection, directly linked to the production of all devices can be delivered with. If the hypothetical yard process can calculate the pump normal, minimum, maximum three kinds of flow. Determine the pump, based on the maximum flow, taking into account deformity flow, not the maximum flow, where desirable deformity flow 11 times as the maximum flow. 2 The lift required to disassemble the system is another important performance data for pipeline pump selection, individual to enlarge the 5% -10% head lift to choose. 3 The nature of the liquid, including the title of the liquid medium, physical properties, chemical properties and other nature, the physical properties of the temperature c density d viscosity u medium particle size and good body content, etc., which affects the system lift, effective cavitation Examples of quantities intended and suitable for the pump: Chemical nature, which means the chemical deterioration and toxicity of the liquid medium, the choice of material for the pipe pump and the type of shaft seal used. 4 disassembly system piping arrangement conditions refers to the liquid from the liquid to the liquid distance from the liquid to the suction side of the lowest level, the highest level of the overhead side and some other data and pipe specifications and their length, material, fittings specifications, quantity, In order to fulfill the Department of comb calculation and calculation of NPSH balance check. 5 pipeline pump selection Prerequisites Many information, such as the liquid manipulation T full with steam P suction side pressure PS relative) overhead side tank pressure PZ altitude, ambient temperature control is cracked or continuous pipeline pump position It is still mobile.
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