Length of suction pipe at the inlet of the self-priming pump
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There are two vertical self-priming pumps at the construction site, with a self-priming height of 6 meters. It is now planned to change their installation location; at the new location, the length of the self-priming pipeline for these pumps will be 15 meters longer than it was at the original location, while the self-priming height remains unchanged. It is also planned to install bottom valves. Is this plan feasible? Without changing the self-priming height at the inlet of the self-priming pump, how much can the length of the self-priming tube be increased? What is the relationship between the volume of the self-priming pipe and the volume of water pumped by the self-priming pump?
It is recommended to get a copy of \"Fundamentals of Chemical Engineering\" and take a look at it. The required conditions probably include the effect of the pipeline resistance added at this point on the suction pressure, as well as the parameters specified for the suction pressure; it is also necessary to determine whether the existing margin is sufficient to meet the operating conditions. Finally, there is the volume of this pipeline. Calculation confirmation based on real-world theory, followed by verification through actual production and usage. For reference.
It’s not feasible; of course, the longer the inlet pipeline of a self-priming pump, the better. If you know to use a cup and bring it directly to your mouth when drinking water, then why don’t you use a 15-meter-long straw? It’ll kill you. . The same principle applies to pumps; it may sound rough, but it makes sense. . . .
Install the pump as close as possible to the inlet container (or tank), at the lowest possible height; the calculation errors can be significant, so practical verification is recommended
The plan is not feasible; adding a bottom valve is also useless. The inlet pipe should be kept within 5 meters.
Parameters such as suction height, pipe diameter, pump flow rate, and water injection volume are interrelated
This post was last edited by Li Rongguo on 2022-10-18 at 10:27. The synchronous self-priming pumps produced by our company can solve this problem. Such pumps have a self-priming height of up to 8.5 meters, and the horizontal distance of the inlet pipeline can be several dozen meters or even over a hundred meters. They can be started at any time to deliver water immediately, with a water delivery time of zero seconds. Using a bottom valve is not an effective solution, as it imposes high requirements on water quality. Feel free to contact me if you have any questions. Li 18353186669 (same number for mobile and WeChat, used regularly)
There is no major issue with the individual analysis: the self-priming height at the pump’s inlet remains unchanged; it’s only the length of the self-priming pipe that has increased. At most, this results in some additional pipe losses at the pump’s inlet side (which is inevitable when the pipe length increases). It is recommended to fill the pump before starting it, ensuring that the pump and the suction pipe are completely filled with water; otherwise, a water intake tank can be used, and there shouldn’t be any problems.