I have a question for everyone: the issue of pump outlet pressure

It is recommended to measure the flow rate, determine the head using the curve, and then calculate the pressure

Hello, we would like to implement this function now: the pump has two outlets, with a flow rate of 7000 units per outlet and a pressure of 8 kilograms. Is the head pressure of this pump 16 kilograms? Thank you. If one pipeline suddenly stops working, how large would the pressure change in the other pipeline be, approximately?

This post was last edited by 3983596_FPPZ on 2019-5-25 at 16:31. For a centrifugal pump, if the rated flow rate of the pump is 700*2=1400 (the unit of flow rate is unknown; it is assumed that the flow rates in the two pipelines are equal), then the pump head is approximately 80/0.85=94 meters (this corresponds to the head of 8 kilograms you mentioned, assuming that the specific gravity of methanol is 0.85 and the pressure at the pump inlet is zero). When a pipeline is shut down, the pump flow rate drops to a little over half of its normal value, while the head remains around 100 meters (a little over 8 kilograms as you mentioned). I’m not sure whether the flow rate at this point is still within the normal operating range of the pump.

It is recommended to start by learning about the principles of centrifugal pumps; as for what type of fluid they are used to handle, that doesn’t really make a difference. First is the operating characteristic of this pump; it should have a head parameter, which essentially represents the pressure at the pump’s outlet. The power of a pump is determined primarily by the flow rate; the higher the pressure, the lower the flow rate, and thus the lower the power. If one of those lines is turned off, it won’t cause any other problems. The pump equipment related to the pressure setup required for production should be installed first. For example, if the pressure required for production is 0.8 MPa, then a pump with a corresponding head capacity must be installed. Please note that when arranging the main pump on the production line, you need to take into account both the head and flow rate. Finally, let me guess: you might be a newcomer to this field. I recommend a basic book for chemical engineering positions, namely \"Principles of Chemical Engineering\", and when you encounter problems, consult the on-site technical staff. Furthermore, there are also many safety facilities for production or systems that automatically adjust to production needs. In short, your question falls within the scope of beginners. It is recommended to first understand the principle and characteristics of centrifugal pumps, and then everything will become clear. With all due respect.

Indeed, this is a relatively basic topic; it is recommended to read books to understand the relationship between head and pressure, and to examine the pump performance curves in order to grasp how pump parameters change.

It is feasible to calculate the pipe diameter during outlet piping, so that when both outlet circuits are in use, the pump will not be overloaded. This shouldn’t be difficult. In simple terms, the sum of the cross-sectional areas of the two outlets must not be greater than the cross-sectional area of the pump outlet.