Liquid ring vacuum pumps are rotating positive displacement pumps that use a liquid (usually water) as a seal to create vacuum. They are known for their ability to handle wet gases, vapors, and even small amounts of liquid carryover without damage.
The impeller is positioned eccentrically within the pump casing. Rotation forces the service liquid outward, forming a ring against the casing wall. Cells of varying size are formed between the impeller hub and the liquid ring, drawing in and compressing the gas.
Applications: Chemical and pharmaceutical industry (distillation, drying, degassing), Food industry, Paper industry, Power plants, Environmental technology.
Advantages: Insensitive to liquid slugs or vapors in the gas inlet, Isothermal compression (process remains cool), Simple construction with only one moving part, Oil-free operation possible, Low noise and vibration levels.
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Single-stage liquid ring vacuum pumps for industrial use.