Key points for selecting submersible pumps
Feb 24,2026
Flow rate and head: Determine the required flow rate and head based on the process flow and water supply and drainage requirements. When selecting a pump, take high flow rate as the basis and consider normal flow rate; The head required for the installation system is generally selected based on the head amplified by 5% -10% margin.
Liquid properties: including the name of the liquid medium, physical properties (such as temperature, density, viscosity, solid particle diameter, and gas content in the medium), and chemical properties (such as chemical corrosiveness and toxicity). These properties involve the calculation of system head, effective cavitation allowance, and the selection of appropriate pump types.
Pipeline layout conditions: Consider the liquid delivery height, distance, and direction for system head calculation and cavitation allowance verification.
Sealing form: Choose the appropriate sealing form according to the properties of the liquid and the requirements of the working conditions, such as packing seal, mechanical seal, etc. For flammable, explosive or highly corrosive media, explosion-proof or corrosion-resistant submersible pumps with reliable sealing performance should be selected.
Material selection: Choose the appropriate material based on the properties of the liquid. Strong corrosive media can be selected from corrosion-resistant materials such as 316L stainless steel or phenolic fiberglass; High temperature and high pressure media can be selected from materials such as tungsten carbide alloy that are resistant to high temperature and high pressure; Abrasive media can be coated with wear-resistant materials such as ceramic coatings.
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