Pipeline pump selection basis and selection method

Pipeline pump selection basis and selection method:

Pipeline pump selection should be based on the process flow, water supply and drainage requirements, from five aspects to be considered, both liquid delivery volume, device lift, liquid properties, piping layout and operating conditions.

1. The flow rate of colloid mill is one of the important 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, the normal, minimum and maximum flow rates of the pump can be calculated. When the pump is selected, the maximum flow rate is taken into consideration, and the normal flow rate is taken into account. When there is no maximum flow rate, normally 1.1 times the normal flow rate can be taken as the maximum flow rate.

2. The required head of the device system is another important performance data of the pump selection. The metering pump is generally used to select the head after amplification of 5%-10% of headroom.

3, liquid properties, including the liquid medium name, physical properties, chemical properties and other properties, physical properties of the 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 Corrosion margin calculation and the type of suitable pump: chemical properties, mainly referring to the liquid medium chemical corrosion and toxicity of the rotor pump, is the choice of pump material and the choice of which type of shaft seal important basis.

4. The pipeline layout conditions of the installation system refer to the liquid-feeding distance of the liquid-feeding distance, the suction of the minimum liquid level, the maximum liquid level of the discharge side, and some data and pipe specifications, lengths, materials, pipe fittings specifications, and quantities. In order to check the head combing calculation and NPSH check.

5, the operating conditions of many content, such as liquid operation T saturated steam force P, suction side pressure PS (absolute), discharge side container pressure PZ, altitude, ambient temperature operation is a gap or continuous, the pump position is fixed It is also a removable screw pump.