Regarding the piping at the pump inlet and outlet
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I have a question for everyone: a centrifugal pump with an inlet capacity of 65 and an outlet capacity of 50. What consequences will occur if piping is not done in accordance with standards during installation: for example, using 40 at the inlet and 32 at the outlet? Alternatively, the import version can come in large or small sizes, and the export version can also be available in large or small sizes. Or the same size. Please ask Haiyou to analyze it.
The inlet and outlet of the pump are designed in accordance with the pump’s flow rate and head. I’ve never used it in that way before; however, various problems are likely to arise
I’m not familiar with the equipment, but I’ve seen it done before – where the diameter changes at both the inlet and outlet ends. It doesn’t seem to be a major issue; it works fine!
Reduced efficiency? Cavitation may occur if the inlet pipe is too small?
Local resistance increases, and cavitation may occur
It doesn’t matter much if the flow rate is high when importing; however, if it’s too low, cavitation can occur, which affects the pump’s service life. If the pump’s outlet size is too large, the motor is prone to tripping, while if the outlet size is too small, the flow rate becomes too high, leading to severe wear on the pump and reducing its service life. Additionally, for media that are flammable or explosive, there are specific requirements regarding the flow rate – too high a flow rate can generate static electricity, posing safety risks
The inlet and outlet pipes are too small, which affects flow rate and head, preventing the pump from operating properly. The outlet pipe is too large, which shortens the service life of the outlet gate valve.
The last edit to this post was made by space ★ Xuan on 2016-5-18 at 16:54. No one else does what you do; firstly, the diameter of the inlet and outlet pipes for a pump is determined based on the pump’s hydraulic characteristics. In simple terms, the diameters of these pipes must be sufficient in order to ensure the pump operates smoothly. If the pump meets your process parameters and performance requirements, but it fails to meet the necessary conditions for ensuring such performance, then it definitely won’t work. By reducing the inlet and outlet sizes, the operating conditions of the pump will be altered, and there are many consequences resulting from such alterations. For example: lack of time, severe vibrations, failure to meet flow and pressure requirements – there are too many such problems.
Under normal circumstances, the inlet and outlet pipes of the pump are one size larger than the pump port; specific hydraulic calculations are required. The pipe is too small, resulting in high resistance; cavitation is likely to occur at the inlet, while pressure buildup is likely to happen at the outlet
I would like to ask why the motor tends to trip when the pump outlet is too large