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Technical Data

LIQUID RING VACUUM PUMP - PRINCIPLE OF OPERATION
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Figure 1
In a cylindrical housing, Partially filled with sealing liquid, a multi-blade impeller on a shaft is positioned eccentrically, port plates with inlet and discharge openings are positioned on either side of the impeller.
Figure 2
A liquid ring is created by the centrifugal force generated by the rotating impeller. The force holds the liquid ring against the inner wall of the pumping chamber. Since the impeller is located eccentric to the pumping chamber, the depth of entry of the blades into the liquid ring decreases and increases as the impeller rotates. This creates increasing impeller cell volume on the inlet port side, creating a vacuum. On the discharge port side, the impeller cell volume decreases, as the blades move further into the liquid ring, increasing the pressures, until discharge takes place through the discharge port. A continuous flow of fresh sealing liquid is supplied to the pump via the sealing liquid inlet.


Copyright © 2005 Dekker Vacuum Technologies, Inc.

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