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Pump selection According to the process flow, water supply and drainage requirements are considered from five aspects, such as liquid delivery volume, device head, liquid properties, piping layout and operating conditions.
1. Colloid mill flow is one of the important performance data of pump selection, which is directly related to the production capacity and conveying capacity of the whole unit. For example, in the design of the design institute, the pump can calculate the normal flow, zui small, and Zui. When the pump is selected, it is based on the large flow rate of zui, taking into account the normal flow rate. When there is no large flow rate of zui, it is usually possible to take 1.1 times of the normal flow rate as the large flow rate of zui.
2. The head required for the installation system is another important performance data of the pump. The metering pump is generally selected by amplifying the 5% to 10% balance.
3, liquid properties, including liquid media name, physical properties, chemical properties and other properties, physical properties are temperature c density d, viscosity u, solid particle diameter and gas content in the medium, etc., which involves the lift of the system, effective gas Calculation of the amount of eclipse and the type of suitable pump: chemical properties, mainly refers to the chemical corrosiveness and toxicity of the liquid medium. The rotor pump is an important basis for selecting the pump material and selecting the shaft seal type.
4. The pipeline arrangement conditions of the equipment system refer to the liquid feeding height of the liquid feeding interval, the suction of the side, the low liquid level, the discharge side, the high liquid level, and other data and pipe specifications and their length, materials, pipe fittings specifications. , number, etc., in order to carry out the calculation of the combing process and the checking of the NPSH.
5, the operating conditions have a lot of content, such as liquid handling T saturated steam force P, suction side pressure PS (to the right), discharge side container pressure PZ, altitude, ambient temperature control is gap or continuous, pump position Is it fixed or portable screw pump?
Reasonable selection of pipeline pump according to process flow
The so-called selection refers to the selection of hardware and software specifications according to the needs of actual business management. Choosing a product of Zui Jia can win at the starting point relative to others.