Five fire pump selection based on the characteristics
Nov 04, 2022
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Fire pump selection basis, should be based on the process, water supply and drainage requirements, from five aspects to consider, both liquid delivery, device head, liquid nature, piping layout and operating conditions, etc.
1、The head required by the device system is another important performance data for the selection of fire pumps, generally use the head after amplifying 5%-10% margin to select.
2、Flow rate is one of the important performance data of the selected fire pump, which is directly related to the production capacity and conveying capacity of the whole device.
3、The piping arrangement condition of the device system refers to the liquid delivery height, liquid delivery distance, liquid delivery direction, the lowest liquid level on the suction side, the highest liquid level on the discharge side and some other data and pipe specifications and its length, material, pipe fittings specifications, quantity, etc., in order to carry out the calculation of the comb head and cavitation margin check.
4, Liquid properties, including the name of the liquid medium, physical properties, chemical properties and other properties, physical properties are temperature c density d, viscosity u, the diameter of solid particles in the medium and the content of gas, which relates to the head of the system, the effective cavitation margin calculation and the type of suitable pump: chemical properties, mainly refers to the chemical corrosion and toxicity of the liquid medium, is the choice of pump materials and the choice of that type of shaft seal Important basis.
5, The operating conditions of many elements, such as the operation of the liquid T saturated vapor force P, the suction side pressure PS (absolute), discharge side container pressure PZ, altitude, ambient temperature operation is a gap or continuous, the location of the fire pump is fixed or removable.
1、The head required by the device system is another important performance data for the selection of fire pumps, generally use the head after amplifying 5%-10% margin to select.
2、Flow rate is one of the important performance data of the selected fire pump, which is directly related to the production capacity and conveying capacity of the whole device.
3、The piping arrangement condition of the device system refers to the liquid delivery height, liquid delivery distance, liquid delivery direction, the lowest liquid level on the suction side, the highest liquid level on the discharge side and some other data and pipe specifications and its length, material, pipe fittings specifications, quantity, etc., in order to carry out the calculation of the comb head and cavitation margin check.
4, Liquid properties, including the name of the liquid medium, physical properties, chemical properties and other properties, physical properties are temperature c density d, viscosity u, the diameter of solid particles in the medium and the content of gas, which relates to the head of the system, the effective cavitation margin calculation and the type of suitable pump: chemical properties, mainly refers to the chemical corrosion and toxicity of the liquid medium, is the choice of pump materials and the choice of that type of shaft seal Important basis.
5, The operating conditions of many elements, such as the operation of the liquid T saturated vapor force P, the suction side pressure PS (absolute), discharge side container pressure PZ, altitude, ambient temperature operation is a gap or continuous, the location of the fire pump is fixed or removable.
