Liquid ring vacuum pumps and compressors

The pump impeller is mounted eccentrically to the axis of the pump casing, when the impeller is rotated at the appropriate speed and a supply of liquid is introduced into the pump chamber the liquid ring is created concentrically to the pump casing. As the impeller rotates a chamber is formed by the impeller blades and the inside of the liquid ring, as this chamber is open to the suction port gas is sucked into the pump. As the impeller continues to rotate the pumping chamber reduces in size because of the eccentricity the trapped gas is compressed, once the chamber reaches the outlet port the gas is discharged at an increased pressure along with some of the seal liquid which removes the heat of compression.

• High reliability no small clearances, few moving parts, no internal lubrication
• Pumps available with a wide range of pumping capacities
• Pumps can operate continuously at any pressure on the pumping speed curve
• Excellent for pumping wet vapours and gases
• Seal liquid can be selected to be compatible with process vapours, enabling solvent recovery
• Available in various materials of construction suitable to pump corrosive gases
• Explosion proof standard compliance with limited modification to the pump