Water Pump Selection Method And Common Problems

Feb 28, 2021

In the current water system design, the designer only provides the flow and head. The actual selection is actually left to the manufacturer, but the selection of the pump is related to the stability and energy saving of the system, so the editor will tell you about the Anhui pump Selection method and common problems.

1. Flow rate is one of the main performance data of pump selection, it is directly related to the production capacity and conveying capacity of the entire device. For example, in the process design of the design institute, three flow rates of normal, smaller and larger pumps can be calculated. When selecting the pump, take the larger flow rate as the basis and take into account the normal flow rate. When there is no larger flow rate, usually 1.1 times the normal flow rate can be taken as the larger flow rate.

2. The head required by the installation system is another main performance data for pump selection. Generally, the head should be selected by magnifying 5%~10% of the margin.

3. Liquid properties, including the name of the liquid medium, physical properties, chemical properties and other properties. The physical properties include temperature c, density d, viscosity u, solid particle diameter and gas content in the medium, etc. This relates to the lift of the system, the effective gas Calculation of surplus and suitable pump type: chemical properties, mainly refer to the chemical corrosiveness and toxicity of the liquid medium, which are the main basis for the selection of pump materials and the selection of which type of shaft seal.

4. There are many operating conditions, such as liquid operation T saturated steam power P, suction side pressure PS, discharge side container pressure PZ, altitude, ambient temperature, whether the operation is intermittent or continuous, and whether the pump position is fixed or available. Moved.