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Dolphin LB 2108 - 3108 A

Dolphin LB – Robust and flexible. Ideal for demanding applications.

Dolphin LB – Robust and flexible. Ideal for demanding applications.

The Dolphin LB 2108 - 3108 A belong 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 LB series type page.

Series Type Page Dolphin LB
Want to know more?
Contact us directly (Busch Turkey):
Get in contact or +90 (0)216 3100573

Dolphin LB – Robust and flexible. Ideal for demanding applications.

Dolphin LB – Robust and flexible. Ideal for demanding applications.


Technical Specifications

Dolphin LB is a series of two-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. Operation as a compressor is possible up to 2.0 bar(g).

Dimensional Drawing Dolphin LB 2108 - 3108 A
Dolphin LB 2108 - 3108 A
Pumping speed

Air at 20 °C. Tolerance: ± 10%

50 Hz 60 Hz
Pumping speed
Technical data Dolphin LB 2108 A Dolphin LB 2508 A Dolphin LB 3008 A Dolphin LB 3108 A
Nominal pumping speed 2100 m3/h 2500 m3/h 3000 m3/h 3100 m3/h
Ultimate pressure 33 hPa (mbar) 33 hPa (mbar) 33 hPa (mbar) 33 hPa (mbar)
Nominal motor rating 55 kW 75 kW 90 kW 110 kW
Nominal motor speed 735 min-1 735 min-1 735 min-1 735 min-1
Noise level (ISO 2151) 79 dB(A) 79 dB(A) 79 dB(A) 79 dB(A)
Weight approx. 1526 kg 1664 kg 1800 kg 2090 kg
Dimensions (L x W x H) (1658-1938) x 650 x 800 mm (1808-2088) x 650 x 800 mm (1908-2188) x 650 x 800 mm (1943-2223) x 650 x 800 mm
Gas inlet / outlet DN 150 KF / DN 150 KF DN 150 KF / DN 150 KF DN 150 KF / DN 150 KF DN 150 KF / DN 150 KF

Technical Specifications

Dolphin LB is a series of two-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. Operation as a compressor is possible up to 2.0 bar(g).

Dimensional Drawing
Dolphin LB 2108 - 3108 A
Dolphin LB 2108 - 3108 A
Pumping speed

Air at 20 °C. Tolerance: ± 10%

50 Hz
60 Hz
Pumping speed
Technical data Dolphin LB 2108 A Dolphin LB 2508 A Dolphin LB 3008 A Dolphin LB 3108 A
Nominal pumping speed 2100 m3/h 2500 m3/h 3000 m3/h 3100 m3/h
Ultimate pressure 33 hPa (mbar) 33 hPa (mbar) 33 hPa (mbar) 33 hPa (mbar)
Nominal motor rating 55 kW 75 kW 90 kW 110 kW
Nominal motor speed 735 min-1 735 min-1 735 min-1 735 min-1
Noise level (ISO 2151) 79 dB(A) 79 dB(A) 79 dB(A) 79 dB(A)
Weight approx. 1526 kg 1664 kg 1800 kg 2090 kg
Dimensions (L x W x H) (1658-1938) x 650 x 800 mm (1808-2088) x 650 x 800 mm (1908-2188) x 650 x 800 mm (1943-2223) x 650 x 800 mm
Gas inlet / outlet DN 150 KF / DN 150 KF DN 150 KF / DN 150 KF DN 150 KF / DN 150 KF DN 150 KF / DN 150 KF

Accessories and Spare Parts

  • Modular pumpsets, configured for partial or total recirculation of the operating fluid
  • Liquid separator
  • Cavitation protection
  • Heat exchanger
  • Gas ejector
  • Wide selection of motors
  • Non-return valves
  • Vacuum relief valves

Want to know more?
Contact us directly (Busch Turkey):
+90 (0)216 3100573 Get in contact

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