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DOLPHIN LG 0890/1200 A

Dolphin LG – robust and high capacity. Ideal for demanding applications, including saturated vapour loads.

Dolphin LG – robust and high capacity. Ideal for demanding applications, including saturated vapour loads.

The Dolphin LG 0890 / 1200 A belongs to the Busch product family of proven Dolphin liquid ring vacuum pumps. You will find more information on advantages, technology, accessories and spare parts, applications as well as a complete product overview on our Dolphin LG series type page

Series Type Page DOLPHIN LG / LR
Want to know more?
Contact us directly (Busch Germany):
Get in contact or +49 (0)7622 681-0

Dolphin LG – robust and high capacity. Ideal for demanding applications, including saturated vapour loads.

Dolphin LG – robust and high capacity. Ideal for demanding applications, including saturated vapour loads.


Technical Specifications

Dolphin LG is a series of single-stage liquid ring vacuum pumps. An eccentrically mounted impeller rotates in a housing partially filled with operating fluid. The impeller blades dip into the fluid, and the centrifugal force exerted by their rotation forms a so-called liquid ring within the housing.


The pumped medium is transported in the spaces between the blades and the liquid ring. The eccentric rotation of the impeller alters the volume of these spaces, causing gas to be drawn in, compressed and expelled.

Dimensional Drawing DOLPHIN LG 0890 / 1200 A
DOLPHIN LG 0890 / 1200 A
Pumping speed

Dry air at 20 °C. Tolerance: - 5%, in accordance with HEI and Pneurop 6612

50 Hz 60 Hz
Pumping speed
Technical data DOLPHIN LG 0890 A DOLPHIN LG 1200 A
Nominal pumping speed 6000 – 8900 m³/h 7650 – 12000 m³/h
Ultimate pressure 160 hPa (mbar) 160 hPa (mbar)
Nominal motor rating 132 / 160 / 185 / 200 / 220 kW 160 / 185 / 220 / 250 / 280 kW
Nominal motor speed 330 / 372 / 420 / 472 / 490 min-1 266 / 298 / 330 / 372 / 420 min-1
Noise level (ISO 2151) < 85 dB(A) < 85 dB(A)
Weight approx. 3880 kg 5760 kg
Dimensions (L x W x H) 2370 x 1330 x 1865 mm 2500 x 1550 x 2160 mm
Gas inlet / outlet DN 300 PN 10 / DN 300 PN 10 DN 350 PN 10 / DN 350 PN 10

Technical Specifications

Dolphin LG is a series of single-stage liquid ring vacuum pumps. An eccentrically mounted impeller rotates in a housing partially filled with operating fluid. The impeller blades dip into the fluid, and the centrifugal force exerted by their rotation forms a so-called liquid ring within the housing.


The pumped medium is transported in the spaces between the blades and the liquid ring. The eccentric rotation of the impeller alters the volume of these spaces, causing gas to be drawn in, compressed and expelled.

Dimensional Drawing
DOLPHIN LG 0890 / 1200 A
DOLPHIN LG 0890 / 1200 A
Pumping speed

Dry air at 20 °C. Tolerance: - 5%, in accordance with HEI and Pneurop 6612

50 Hz
60 Hz
Pumping speed
Technical data DOLPHIN LG 0890 A DOLPHIN LG 1200 A
Nominal pumping speed 6000 – 8900 m³/h 7650 – 12000 m³/h
Ultimate pressure 160 hPa (mbar) 160 hPa (mbar)
Nominal motor rating 132 / 160 / 185 / 200 / 220 kW 160 / 185 / 220 / 250 / 280 kW
Nominal motor speed 330 / 372 / 420 / 472 / 490 min-1 266 / 298 / 330 / 372 / 420 min-1
Noise level (ISO 2151) < 85 dB(A) < 85 dB(A)
Weight approx. 3880 kg 5760 kg
Dimensions (L x W x H) 2370 x 1330 x 1865 mm 2500 x 1550 x 2160 mm
Gas inlet / outlet DN 300 PN 10 / DN 300 PN 10 DN 350 PN 10 / DN 350 PN 10

Accessories and spare parts

  • Motorized pumpsets with gearbox or V-belt drive
  • Partial or total recirculation systems
  • Cavitation protection
  • Gas ejector
  • Non-return valves
  • Vacuum relief valves

Want to know more?
Contact us directly (Busch Germany):
+49 (0)7622 681-0 Get in contact

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