Liquid Ring Vacuum Pumps

Liquid Ring Vacuum Pumps


High-efficiency liquid ring vacuum pumps are built for heavy duty, wet and humid applications where most other pumps performance will drop due to abrasion and lime scale from the process. The larger liquid ring pumps are often part of engineered systems designed to meet even the highest demands. Pumps are provided with threaded connections for service liquid, pump draining, vacuum relief valve and companion flanges. Pumps can also come as completely packaged units using water or water as a seal fluid. The proven compression principle allows them to be used in all sectors of industry. Critical applications such as evacuating saturated gases and vapours are easily carried out using liquid ring vacuum pumps.

Features & Benefits

  • Single and double stage.
  • External sealed bearings.
  • Quiet, low vibration operation.
  • Requires little to no maintenance.
  • Safe for explosive gases.
  • Stable suction capacity even when liquid is delivered.
  • No need for pre-separation.
  • Single stuffing box.
  • Available in base-mounted and drive-coupled configurations.

Construction Materials

  • Cast Iron
  • Carbon Steel
  • Stainless Steel
  • Other materials available upon request


  • Vacuum distillation
  • Vacuum filtration
  • Vacuum priming
  • Deareation
  • Sterilization
  • Plastic extruder for degassing and handling water carryover
  • Vapor and solvent recovery
  • Condenser exhaust
  • Crystallization


  • Capacity to 52 m3/h (31 cfm)
  • Pressure to 0.04 MPa (300 Torr)
  • Average Service Liquid Flow to 73 l/m (19 gpm)
  • Power to 70 kW (93 hp)
  • Speeds to 1,500 rpm

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