Liquid Ring Vacuum Pump Technology
Elmo Rietschle’s L‑Series liquid ring vacuum pumps deliver dependable vacuum performance for wet, abrasive, and demanding industrial environments. Designed for continuous operation, these pumps use a proven liquid ring pump operation that ensures high reliability, stable vacuum levels, and long service life even when handling vapors, liquids, or contaminated gases.
Liquid ring vacuum pumps are an ideal solution for processes where conventional dry or oil‑sealed technologies may struggle. Their robust design allows them to operate effectively under fluctuating process conditions while maintaining consistent performance.
Liquid Ring Pump Operation
The liquid ring pump operation is based on an eccentrically mounted impeller rotating inside a cylindrical casing partially filled with sealing liquid. As the impeller rotates, centrifugal force forms a liquid ring along the casing wall. This liquid ring creates sealed chambers between the impeller blades.
Gas enters through the suction port and is trapped inside these chambers. As the impeller continues to rotate, the chamber volume decreases, compressing the gas before it is discharged through the outlet. The liquid ring acts as a seal, coolant, and lubricant, eliminating metal‑to‑metal contact and allowing the pump to tolerate liquid carryover without damage.
This operating principle enables smooth, low‑vibration operation while supporting both vacuum generation and gas compression in a single unit.
