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Dolphin LG 0890 / 1200 A

  • Robust:
    proven technology, high particle and vapour tolerance
  • Flexible:
    application-oriented, choice of cast iron (EN-GJL-200) housing with ductile cast iron impeller or all 316 grade corrosion-free stainless steel material
  • Efficient:
    low operating costs
     

Dolphin LG is a series of robust and reliable single-stage liquid ring vacuum pumps from Busch in a base plate design. Their proven operating principle enables these high-capacity vacuum pumps to be used in many industrial sectors, including power plants, sugar production as well as pulp and paper industry. Even demanding applications, such as the discharge of particle-laden gases or highly saturated vapours, can easily be carried out.

The Dolphin series encompasses decades of experience in the manufacture and use of liquid ring vacuum pumps, offering perfect vacuum generation in challenging environments.

The operating fluid is usually water, but other liquids may be used if required by the process conditions. Dolphin LG liquid ring vacuum pumps may be operated as a simple continuous flow system, or as a partial or total recirculation system with a liquid separator as standard.

The precisely dimensioned range of sizes, extensive range of accessories and choice of construction materials, including cast iron (EN-GJL-200) and 316 grade stainless steel, allow these vacuum pumps to be perfectly adapted to many different industrial processes. Due to their modular design, various assemblies are possible to suit many applications.

Dolphin LG technology uses the proven liquid ring principle, with contact-free internal components and virtually isothermal compression. The LG series has been developed for continuous operation.


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

Want to know more?
Contact us directly (Busch United Kingdom):
+44 (0)1952 67 74 32 Get in contact

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.

Accessories / Technical options

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

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

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