Since high pumping speeds are often required, Dolphin liquid ring vacuum pumps are used for this application as well.

Liquid ring vacuum pumps are exceptionally well suited for use as modules in vacuum systems and installations.

Beside the new range of 2-stage oil-sealed rotary vane vacuum pumps, Atlas Copco also introduced a new range of vacuum booster pumps, piston pumps, liquid ring pumps and steam ejectors.

Fig. 6: Vacuum system with five one-stage Dolphin liquid ring vacuum pumps for degassing process fluid (Source: Busch Dienste GmbH)

The liquid ring vacuum pumps often used for this process have the drawback that they require water as an operating fluid.

Edwards dry mechanical vacuum pumps offer considerable energy savings compared to the traditional multi-stage steam ejector systems, backed with liquid ring pumps.

By reducing seal liquid consumption, L-Series circulation systems offer clear advantages over other liquid ring pumps.

Both types of systems use steam jet eductors or liquid ring pumps to generate the vacuum required.

Pumping water vapor and non-condensables is an ideal application for Dolphin liquid ring vacuum pumps.

Since the non-condensable gases are saturated with water vapor, liquid ring vacuum pumps are the primary technology for this application.

Liquid ring pumps have an annular clearance substantially filled with compressed gas between a stationary housing and a rotating liner inside the housing.

One significant benefit of liquid ring vacuum pumps is that both the operating fluid and the materials used for the components can be adapted to fit the medium being pumped.

One significant advantage of liquid ring vacuum pumps is that the operating fluid and the materials used for the components can be adapted to fit the pumping medium.

Finally, for stable operation liquid ring pumps must be permanently supplied with liquid, which escapes with the conveyed gas on the discharge side.

For stable operation, liquid ring pumps must be permanently supplied with liquid, which escapes with the conveyed gas on the discharge side.