The pump is trying to pump polyvinyl alcohol, but it can’t do it
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I’m using a gear pump to transfer polyvinyl alcohol with a viscosity of over 100,000; I need to pump it to a height of 4 meters. The pump is equipped with a 3kW motor that is connected directly to the pump head. When the frequency is set to 5Hz, the pump reaches around 100 revolutions per minute before an overload alarm is triggered and the pump can no longer function. What’s causing this issue?
Do you mean the actual amount of traffic that can be achieved, or the desired amount of traffic? At the moment it’s not possible to achieve the flow rate required, as mentioned; it’s around 1 to 2 tons per hour
The viscosity is quite high; is there any good solution?
Centrifugal pumps are not suitable for media with high viscosity, as the impeller may be damaged in such cases. For media with high viscosity, piston/plunger diaphragm pumps or piston/plunger pumps are generally used.
The last edit to this post was made by 1070273960 on 2016-9-5 at 12:46; choosing a different option – this definitely won’t work for you
What kind of pump would be better?
They already said it’s a gear pump. It is best to ask a professional manufacturer to select the model to avoid misguidance.
Someone who knows how to do the calculations should help with the selection – we only have a general idea of it. P-type positive-displacement pumps are generally fine, but it’s still necessary to calculate the appropriate power rating for the motor: lol
A gear pump will work; design and selection are required – the model, specifications, and speed of the pump need to be determined based on factors such as viscosity and temperature. Gear pumps are divided into external meshing gear pumps and internal meshing gear pumps, and the specific model depends on the actual operating conditions. You can message me privately so that I can help you with the selection