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The following images show the pumping principle of our rotary lobe pumps.
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0° position:
Conveying via the upper lobe.
Seal against backflow via the lower lobe.
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90° position:
Conveying via the lower lobe.
Seal against backflow via the upper lobe.
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Reverse flow:
Reversing the flow direction by changing the rotating direction of the drive shaft.
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The rotary lobe pump with rubber-coated lobes is an invention of Vogelsang Germany.
As a contactless, rotating positive displacement pump, it is indispensable in the contemporary pump and waste management technology market. Thanks to the pulsation-free running HiFlo® lobes, which are highly insensitive to foreign materials and dry running, and to a flowrate that is in proportion to the rotational speed, the pump is used in a variety of new applications and industrial sectors.
Pump principle with 4-tip lobes.
Every position of the counter-rotating lobes assure a seal between the suction and discharge side of this valve-free, positive displacement pump. The liquid gently flows, which is very important for media sensitive to shearing forces.
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Pump principles