A liquid ring pump is a rotating positive displacement pump. They are typically used as a vacuum pump but can also be used as a gas compressor. The function of a liquid ring pump is similar to a rotary vane pump the difference being that the vanes are an integral part of the rotor and churn a rotating ring of liquid to form the compression chamber seal. They are an inherently low friction design, with the rotor being the only moving part. Sliding friction is limited to the shaft seals. Liquid ring pumps are typically powered by an induction motor.
Read more about Liquid Ring Pump: Description of Operation, History, Types and Applications
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Heaven’s last best gift, my ever new delight,
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Calls us: we lose the prime, to mark how spring
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What drops the myrrh and what the balmy reed,
How nature paints her colors, how the bee
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—John Milton (1608–1674)
“He will not idly dance at his work who has wood to cut and cord before nightfall in the short days of winter; but every stroke will be husbanded, and ring soberly through the wood; and so will the strokes of that scholar’s pen, which at evening record the story of the day, ring soberly, yet cheerily, on the ear of the reader, long after the echoes of his axe have died away.”
—Henry David Thoreau (1817–1862)
“God primes the pump of obligation.”
—A.P. Martinich (b. 1946)