Pump pipeline issues?
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A problem was identified: some pumps (centrifugal pumps) have a return line in the outlet pipeline that leads to the container at the pump inlet, while other pumps do not have such a return line. This return line is basically closed. I don’t know what its purpose is? When to use it?
This is the minimum return line. This post was last edited by jevy on 2009-4-8 22:11]
Minimum flow line, which allows for adjusting flow and pressure; it is also activated when the high-pressure pump starts up
Is the issue you’re referring to the feed pipeline of the pump? For some raw material storage tanks, consideration is given to the feeding of raw materials into these tanks, that is, to the unloading from tank trucks!:$
One is the minimum flow line of the high-pressure centrifugal pump, which is opened before starting the pump and gradually closed as the pump outlet valve is opened. Another approach is to prevent the liquid in the container from being emptied by sending the liquid back directly into the container.
It’s mainly because you don’t understand the manufacturing process; just ask the process technician, haha
Agree with the 4th floor – it’s for adjusting pressure and flow rate.
This line is used for cycling; it is put into use when the machine operates alone
The minimum flow line can be used to adjust the flow and pressure of the pump; it is common on high-pressure pumps. Its purpose is, firstly, to prevent the pump from running dry due to a low liquid level in the container ahead of it, by sending some of the liquid back directly into the container； Second, it prevents pressure buildup inside the pump when the flow rate is too low!
The minimum flow line and the return line are usually used in high-speed pumps or multi-stage pumps; they are activated before starting the pump, and once the motor load decreases and the outlet opens, they are turned off simultaneously.
⒈Used for individual unit trial operation before commissioning； ⒉When a small amount of raw material is being conveyed, it is used as a return line to ensure the smooth operation of the pump.
In the case of ordinary centrifugal pumps, the outlet is generally required to be closed when the pump is turned on; the bypass valve serves to open when the pump is started, thereby reducing the starting current of the pump； In the case of high-speed centrifugal pumps, the cross-section is certainly larger; this is known as the minimum flow line, and it serves to protect the pump when it is started up or switched on.
Oh, I misread it; I thought it was referring to the pipe that goes from the pump outlet to the pump’s end face. The pipeline that returns to the previous container is the minimum flow line.
1. The pump’s minimum flow rate setting is generally used only when starting the pump or when the liquid level in the tank is low! Prevent pump cavitation!
Isn’t this line the auxiliary line of the pump? Used for pump purging?
Minimum flow line, which allows for adjusting the flow rate to prevent pressure buildup in the pump
Add a return line on the export pipeline to container 1 at the pump inlet; 2 is the minimum flow line of the pump. The liquefied gas pump (shielded pump) is used to prevent pump cavitation
It is the minimum return line, commonly used in high-speed centrifugal pumps and multi-stage centrifugal pumps. Its function is to enable individual unit testing, and it prevents pressure buildup when the pump is started.
Is it this process pipeline at the pump outlet that often experiences zero flow? This pipeline was installed to ensure that the pump does not run idle for long periods of time.
Minimum return line! It is commonly seen in high-speed pumps and shielded pumps, mainly to prevent cavitation ； The secondary pipeline in the design of shielded pumps is mainly for internal cooling!