Water-sealed Liquid Ring Systems – Pros & Cons

Economizer V” water-sealed liquid ring systems with field adjustable water recirculation.

Water-sealed liquid ring vacuum pump systems have always enjoyed a good reputation based on exceptional reliability, low maintenance and a very long field-proven record. However, they normally require a continuous supply of water when they run which can be costly when water and sewage costs are added.

EMSE Corporation has developed “Economizer V” – a line of water-sealed liquid ring vacuum systems that offer a unique feature: field selectable and adjustable amount of partial water recirculation up to 95% without the use of heat exchangers and chilled water. This feature will dramatically minimize operating expenses without the added cost to the initial price, installation and maintenance.



  • Very good choice for a dedicated anesthesia evacuation system
  • Simple, time-proven design
  • Capable of taking slugs of water
  • Low maintenance
  • Low operating costs
  • Dependence on a reliable supply of water
  • Good water quality is critical to avoid premature failures due to scale build-up

The EMSE Design Guide

The EMSE interactive Design Guide calculates total demand, recommends multiple system designs, calculates intake, exhaust, riser, branch and zone piping sizes--all optimized based on user input. Start designing your system now.

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