Liquid ring pumps operate with only one moving part, the impeller shaft assembly. The impeller is mounted eccentrically relative to it’s casing. The liquid ring is formed by the service liquid (normally water) rotating concentrically in it’s casing. Process gas enters through the suction port, travels between the impeller blades and is compressed prior to exhausting through the discharge port along with a quantity of service liquid.
Various materials of construction including 316 stainless steel,
Base plate or pedestal mounting configurations
System configurations (once through, partial recovery, and
Outboard bearing in place of standard inboard bearing
Packed gland seal or double mechanical seal
1. Once Through System - No Recovery
The service liquid comes from a fresh supply, passes only once through the pump and is discharged to an open drain.
2. Partial Recovery System
Within this system the service liquid is discharged to a vessel which allows separation of the gas and liquid. A portion of the discharged liquid is returned to the pump’s service fluid inlet together with a fresh liquid supply. This reduces the amount of fresh liquid required.
3. Total Recovery System
This system provides for total recirculation of the service liquid and is preferable when liquid is in short supply or where there is a risk of contamination. A heat exchanger is added to the system to remove the heat of compression prior to re-use of the service liquid.