Types of liquid ring vacuum pumpsLiquid ring pumps are available in single- and two-stage versions. In single-stage versions, compression is carried out once. In two-stage versions, the pumped medium is compressed again to allow higher vacuum levels to be achieved. Operation as a compressor is also possible with some models of liquid ring vacuum pumps.
Depending on the pumped medium, liquid ring vacuum pumps can be operated as a simple continuous flow system or as a partial or total recirculation system.
The operating fluid is usually water, but other liquids may be used if required to suit the process conditions.
|Product series||Ultimate pressure / Overpressure||Version|
|DOLPHIN LX||33 hPa (mbar)||single-stage (valved) vacuum pump|
|DOLPHIN LT||33 hPa (mbar)||two-stage|
|DOLPHIN VL||33/130 hPa (mbar)||single- or two-stage|
|DOLPHIN LM||130 hPa (mbar)||single-stage|
|DOLPHIN LR||33 hPa (mbar)||single-stage (valved)|
|DOLPHIN LB||33 hPa (mbar)||two-stage vacuum pump / compressor|
|DOLPHIN LA||130 hPa (mbar)||single-stage|
|DOLPHIN LG||160 hPa (mbar)||single-stage (valved)|
|DOLPHIN LN||9 bar(g)||single- or two-stage compressor|