How to prevent voids at the suction inlet when transporting highly viscous materials using gear pumps.
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Dear forum members, we use gear pumps for transporting highly viscous materials in a molten state at high temperatures. Due to the extremely high viscosity of these materials, it is suspected that the pump inlet area is not fully filled and there are gaps, which has a significant impact on the processes downstream of the pump. Is there any good solution? We would appreciate your advice. The pump inlet pipeline is vertical, with a diameter of DN200 and a length of about 2.5 meters.
Would using a vacuum drainage tank be better?
Our company manufactures glue-applying twin-screw pumps; feel free to contact me at 15068542311, Wang. Thank you
The medium has high viscosity, so it is necessary to reduce the speed of the gear pump. If possible, could you provide the viscosity value of the medium? I can then help you set an appropriate rotation speed.
The lower the speed of the positive displacement pump, the higher viscosity it can handle
You’ve provided an idea; thank you.
Thank you so much; the dynamic viscosity is between 600 Pa·s and 1000 Pa·s
The pump’s rotation speed should be set between 20-30 rpm; a cycloidal pinwheel reducer should be used, along with an inverter-driven motor. The flow rate is adjusted by varying the frequency.
For high-viscosity materials, a rotor pump can be considered