VACUUM PRIMING SYSTEMS
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CFP's Website for Q-VAC High Quality Vacuum Priming Systems.
Call (800) 521-2083 (USA only) or contact us for
Liquid Ring Technology in Vacuum Priming Systems
PROPERTIES & ADVANTAGES
– –5 acfm to 145 acfm typical (¾ HP to 10 HP)
–Vacuum to 29” HgV (25 Torr)
–MUCH larger sizes available (250+ HP)
–316ss impellers and Viton mechanical seals standard
–All 316ss wetted parts and Teflon mechanical seals available
–Most robust technology available
–No metal-to-metal contact
–Only one moving part
–Almost no maintenance
–Unaffected by some ingestion of water and small/soft solids
–Requires a suitable seal water supply
–Performance is affected by seal water temperature
LIQUID RING PRINCIPLE
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.
A liquid ring is created by the centrifugal force generated by the rotating
impeller. This force holds the liquid ring against the inner wall of the
Since the impeller is located eccentric to the pumping
chamber, the depth 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 pressure, 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.
We offer the best value in quality automatic vacuum priming systems for centrifugal water
pump priming, siphon control systems, and water box primers. Q-VAC Priming
Systems are ideal for power plants, municipal water systems and wastewater
treatment plants, industrial applications, irrigation systems, steel mills, and
marine applications. Please contact us
for expert assistance in selecting the best solution for your application.
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Combined Fluid Products Company