Fellps said:I have a centrifugal pump 50 m above a vessel, I’m pumping water in at 4 bar gauge into this vessel.
At the tankruss_watters said:Is the 4bar measured at the valve/pump or in the tank?
Then the pressure at the valve is roughly 0 absolute and opening the valve to atmosphere will cause the water level to fall. How much it falls will depend on how the tank is being pressurized. If there is compressed air at the top of the tank, the water level will drop about 10m. If there is no air in the tank and it is just solid water, it will only drop a little and the tank pressure will increase to 5 bar gauge since water is incompressible.Fellps said:At the tank
Thank you very much, the need for the pump comes from the need for control. The vessel must be remotley flooded at a controlled rate.russ_watters said:Then the pressure at the valve is roughly 0 absolute and opening the valve to atmosphere will cause the water level to fall. How much it falls will depend on how the tank is being pressurized. If there is compressed air at the top of the tank, the water level will drop about 10m. If there is no air in the tank and it is just solid water, it will only drop a little and the tank pressure will increase to 5 bar gauge since water is incompressible.
...of course, that begs the question: why do you need a pump to begin with? Why couldn't you just let gravity fill the tank?
A centrifugal pump uses an impeller to spin and create a centrifugal force, which then pushes water out through a discharge port. The impeller is typically driven by an electric motor.
The maximum water pressure that can be achieved with a centrifugal pump at a 50m head is 4 bar gauge, which is equivalent to about 58 psi.
The water pressure is directly proportional to the speed of the centrifugal pump. As the speed increases, the water pressure also increases.
Yes, a centrifugal pump can be used for other types of fluids besides water, such as chemicals, oils, and slurry. However, the design and materials used may need to be different depending on the type of fluid being pumped.
The main factors that can affect the water pressure at a 50m head include the speed of the pump, the size and design of the impeller, the viscosity of the fluid being pumped, and the condition of the pump and its components.