The problem that the pump is unable to transport the fluid
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It is a magnetic-lined fluoroplastic centrifugal pump with a head of 33 and a flow rate of 12.5 M3/h; it can transport water while in operation, with an outlet pipe pressure of 0.1 Mpa. However, it is unable to transport sulfuric acid – what is the reason for this? Also, what is the air pumping capacity of a water jet pump? This post was last edited by 156026692 on 2009-2-10 at 21:00
Is it overloading or the pump simply can’t deliver fluid? Since sulfuric acid has a density much higher than that of water (over 1.5), it’s possible that it’s overloading; try reducing the size of the outlet valve
Sulfuric acid has a higher density than water, so a pump with the same power cannot achieve the same head when pumping sulfuric acid.
I agree with LS’s view; it’s very likely that the pump is overloaded. Since the density of sulfuric acid is greater than that of water, without changing the pump itself, the shaft power required to transport sulfuric acid is higher than that needed to transport water; it is very likely that this value exceeds the pump’s rated power, resulting in overload and thus an inability to transport the liquid. You can try to reduce the outlet valve opening to lower the actual flow rate of the pump, thereby reducing its shaft power.
It’s correct upstairs; try reducing the flow rate
The head of a pump has nothing to do with density; density is only proportional to the shaft power of the pump. Therefore, as long as the motor powering the pump has sufficient capacity, there is no problem in transporting concentrated sulfuric acid. Is your issue related to the current-limiting protector or thermal relay in the control circuit activating when the pump starts?
Changes in fluid density are only related to shaft power (provided that viscosity remains constant). Changes in fluid density do not affect flow rate, head, or efficiency. Reasons why a pump cannot operate properly: 1. At the start of operation, normal operating conditions may not have been reached yet; 2. There may be residues or slag at the inlet; 3. Eddy current prevention measures; 4. The raw material contains water
A standard magnetic pump with a fluoroplastic lining can be used to handle fluids with a specific gravity of less than 1.3 without any problems after it leaves the factory. However, when it is used to transport concentrated sulfuric acid with a specific gravity greater than 1.8, the shaft power increases. In such cases, it is necessary not only to increase the power of the motor to prevent overload but also to enhance the magnetism of both the internal and external magnets; otherwise, asynchronous operation between these magnets will occur, resulting in loss of rotation. No liquid comes out. I’m not sure if you’re satisfied with my answer If the head provided by the pump you choose is sufficient, it is possible to cut the impeller in order to reduce the head and thus lessen the load on the internal and external magnets. This approach worth trying. If you have any problems with pumps, please contact me via QQ at 279544904 or MSN at ok5187@hotmail.com. I am a keen enthusiast of pump technology, and we can discuss this further. Relevant solutions can be found in the electronic catalog of fluoroplastic magnetic pumps on www.dnpump.com. This post was last edited by noloo on 2009-2-10 at 19:21
After all, they are professionals; what they said was absolutely spot-on.
The pump will not run. What are the symptoms: vibration, overcurrent, or no flow?； Please explain in detail to help everyone analyze it.