Busch has introduced a brand new series of liquid ring vacuum pumps to the market: the Dolphin LX series is made up of eight different pump sizes of single-stage liquid ring vacuum pumps in block construction, that reach ultimate pressures of 33 hPa (mbar). The suction capacities cover a range of 25 to 455 cubic metres per hour.

All pump sizes of this new generation of liquid ring vacuum pumps are fitted with an impeller made of stainless steel. The pump sizes from 75 to 220 cubic metres per hour are also available as completely stainless steel versions. Thanks to the choice of materials and the extensive accessories programme, the Dolphin LX vacuum pumps can be deployed brilliantly in all areas of industry, even in critical applications. Combined with a gas ejector, ultimate pressures of 8 hPa (mbar) are reached. You can basically choose between three different operating modes: with the re-circulation system, the operating fluid is permanently fed and discharged together with the process gas. When the circuit is open, the operating fluid collects in a downstream container, where it is separated from the gas and then fed again to the vacuum pump. At the same time, fresh operating fluid flows into the vacuum pump. When operating with the closed circuit, the operating fluid is also collected in a downstream container and separated from the gas, after which it flows through a cooler before being fed back to the vacuum pump. When the circuit is closed, hardly any operating fluid is lost.

Busch Vacuum Pumps and Systems

Marketing/Marketing Services

Uli Merkle • April 6, 2010

The new Busch Dolphin liquid ring vacuum pump sizes can now reach a suction capacities in excess of 10,000 cubic metres per hour. The extension of the Dolphin LA/LB series means that the available product range comprises of 21 different pump sizes from 50 to 10,900 cubic metres per hour. In order to achieve optimal ultimate pressure adjustment matched to the demands of the process the vacuum pumps are supplied in two designs: Dolphin LA liquid ring vacuum pumps are single-stage and reach ultimate pressures of between 120 and 150 mbar, depending on the pump size. Due to its two-stage design, the Dolphin LB version can reach ultimate pressures of 33 mbar.

Dolphin liquid ring vacuum pumps are used as individual units and in vacuum systems in many industrial sectors. You can basically choose between three different operating modes: with the re-circulation system, the operating fluid is permanently fed and discharged together with the process gas. When the circuit is open, the operating fluid collects in a downstream container, where it is separated from the gas and then fed again to the vacuum pump. At the same time, fresh operating fluid flows into the vacuum pump. When operating with the closed circuit, the operating fluid is also collected in a downstream container and separated from the gas, after which it flows through a cooler before being fed back to the vacuum pump. When the circuit is closed, hardly any operating fluid is lost.

Dolphin liquid ring vacuum pumps are available in a variety of materials. This means that the appropriate materials or material combinations can be used for all process media. Dolphin LA/LB vacuum pumps are also available in an ATEX-certified version for category 1(i)/2(o)G IIB+H2 T4.

The main fields of application for these vacuum pumps are in the oil and gas industry, the chemical and pharmaceutical industry as well as in plastic processing.

Busch Vacuum Pumps and Systems

Marketing/Marketing Services

Uli Merkle • March 30, 2010