What are the methods for selecting a high temperature oil pump?
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First, the required head of the device system is another important performance data of the pump selection. Generally, it is necessary to select the head after amplification with 5%-10% margin.
Second, the liquid properties, including the name of the liquid medium, physical properties, chemical properties and other properties, physical properties of temperature c density d, viscosity u, the diameter of the solid particles in the medium and the gas content, which involves the system's lift, effective gas The calculation of corrosion margin and the type of suitable pump: Chemical properties, mainly referring to the chemical corrosivity and toxicity of the liquid medium, are important basis for the selection of the high-temperature heat-conducting oil pump material and the choice of the shaft seal type.
Third, the flow rate is one of the important performance data of the selected heat transfer oil pump. It is directly related to the entire device's production capacity and delivery capacity. For example, in the process design of the design institute, the normal, minimum and maximum flow rates of the pump can be calculated. When the pump is selected, the maximum flow rate is taken as the basis and the normal flow rate is taken into consideration. When there is no maximum flow rate, it is usually possible to take 1.1 times of the normal flow rate as the maximum flow rate.
Fourth, the operating conditions are many, such as the liquid operation T saturated steam force P, the suction side pressure PS (absolute), the discharge side container pressure PZ, altitude, ambient temperature operation is a gap or continuous, high temperature heat pump position Is it fixed or removable?
V. Pipeline arrangement conditions of the installation system refer to the liquid-feeding distance of the liquid-feeding distance to the liquid-feeding direction, suction of the minimum liquid level at the side, the maximum liquid level at the discharge side, and some data and pipe specifications, and their lengths, materials, and pipe fittings specifications. Etc. for system head calculation and NPSH check.