Selection of transfer pumps for high-viscosity materials such as glycerin and diethanolamine
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May I ask about the selection of transfer pumps for high-viscosity materials such as glycerin and diethanolamine? Material: Stainless steel. For the same type of pump, should a motor with 1400 r/min or 2900 r/min speed be chosen?
When the viscosity of the material is high, it is necessary to choose a pump with a low rotational speed; high speeds make it difficult to draw up the viscous material, and phenomena such as cavitation can occur. Centrifugal pumps are not recommended as their efficiency is very low. It is advisable to use positive displacement pumps for transporting materials with high viscosity.
Generally, screw pumps \ diaphragm pumps \ peristaltic pumps can all be used
I tried using a centrifugal pump, but it simply couldn’t lift the fluid (at a height of 6 meters); only a gear pump managed to do it with some difficulty. Thank you all for your replies; it would be great if you could recommend some models
A gear pump, or a diaphragm pump would work fine
Gear pumps and screw pumps are both suitable; they can handle media with a high viscosity, and the flow is continuous without any pulsations. Pneumatic diaphragm pumps are generally used only when high explosion-proof requirements exist!