Five basis characteristics of fire pump selection
Dec 14, 2022
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The basis for fire pump selection should be based on the process flow, water supply and drainage requirements, and consider five aspects, namely, liquid delivery volume, device lift, liquid properties, pipeline layout, and operating conditions.
1. The head required by the installation system is another important performance data for the selection of fire pumps. Generally, the head needs to be enlarged by 5%-10% to select the type.
2. The flow rate is one of the important performance data for selecting a fire pump, which is directly related to the production capacity and delivery capacity of the entire device.
3. The pipeline layout conditions of the device system refer to some data such as the height of the liquid delivery, the distance of the liquid delivery, the direction of the liquid delivery, the lowest liquid level on the suction side, the highest liquid level on the discharge side, etc., as well as the pipe specifications and their length, material, pipe fitting specifications, and quantity etc., in order to carry out the calculation of the comb head and the check of NPSH.
4. Liquid properties, including the name of the liquid medium, physical properties, chemical properties and other properties. Physical properties include temperature c density d, viscosity u, solid particle diameter and gas content in the medium, etc., which relate to the head of the system, effective gas Calculation of corrosion residue and suitable pump type: Chemical properties mainly refer to the chemical corrosion and toxicity of the liquid medium, which is an important basis for selecting the pump material and the type of shaft seal.
5. There are many operating conditions, such as liquid operation T, saturated steam force P, suction side pressure PS (absolute), discharge side container pressure PZ, altitude, ambient temperature, whether the operation is intermittent or continuous, and the position of the fire pump is Fixed or removable.
1. The head required by the installation system is another important performance data for the selection of fire pumps. Generally, the head needs to be enlarged by 5%-10% to select the type.
2. The flow rate is one of the important performance data for selecting a fire pump, which is directly related to the production capacity and delivery capacity of the entire device.
3. The pipeline layout conditions of the device system refer to some data such as the height of the liquid delivery, the distance of the liquid delivery, the direction of the liquid delivery, the lowest liquid level on the suction side, the highest liquid level on the discharge side, etc., as well as the pipe specifications and their length, material, pipe fitting specifications, and quantity etc., in order to carry out the calculation of the comb head and the check of NPSH.
4. Liquid properties, including the name of the liquid medium, physical properties, chemical properties and other properties. Physical properties include temperature c density d, viscosity u, solid particle diameter and gas content in the medium, etc., which relate to the head of the system, effective gas Calculation of corrosion residue and suitable pump type: Chemical properties mainly refer to the chemical corrosion and toxicity of the liquid medium, which is an important basis for selecting the pump material and the type of shaft seal.
5. There are many operating conditions, such as liquid operation T, saturated steam force P, suction side pressure PS (absolute), discharge side container pressure PZ, altitude, ambient temperature, whether the operation is intermittent or continuous, and the position of the fire pump is Fixed or removable.
