High reliability of the Laby® LNG BOG compressor
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Laby® Compressor
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Laby® Standard Packages
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Defexpo 2016
27.03.2016 - 31.03.2016
Naqueri Quitol in Quepem Taluka of South Goa, India
GPA Convention 2016
10.04.2016 - 13.04.2016
New Orleans, USA
Gulf South Rotating Machinery Symposium 2016
27.04.2016 - 30.04.2016
Baton Rouge, USA


Labyrinth Piston Compressors 

The Laby® Compressor represents unbeatable reliability and availability, thanks to its unique labyrinth sealing system on piston and piston rod gland that allows oil-free and contact-free compression. The result is an extended MTBO (meantime between overhaul), that has a positive impact on reliability and operating cost. Neither contamination of the gas by abraded material from piston rings nor hot spots from friction occur. The Laby® is designed to compress bone-dry, dirty, abrasive and other gases. The gastight casing reduces gas emission and losses to the environment to zero. The Laby® compressor easily manages the compression of LNG boil-off gas at suction temperatures down to minus 170°C (minus 250 F).

Compressor typeD/EK
Discharge pressure
[bar abs] / [psi]
up to 300 / 4350up to 120 / 1740
Suction volume
[Nm3/h] / [scfm]
up to 11'000 / 6'500up to 6'000 / 3'500

Design features

  • Labyrinth sealing system on piston and piston rod gland
  • Non-lubricated cylinder section (no oil required, no contamination of the gas)
  • No contact seals required for trouble free compressor operation with dirty gas
  • Vertical piston rod guiding arrangement
  • Lubricated piston guiding system for precise alignment and long life
  • Top quality compressor valves for high reliability
  • Standard executions available with: open distance piece; closed and purged distance piece; gas- and pressure-tight crankcase (zero leakage)


  • Industrial gas industry
       - Bottling Plants for gas cylinders
       - Air separation plants
  • Steel industry 
  • Chemical industry
  • Fertilizer production
       - Product pipelines
  • Food and beverage industry
  • Refrigeration and cryogenic installations
  • Boil-off gas handling
  • LNG boil-off gas
  • Oil and gas industry
  • Petrochemical industry
  • Polymer production
       - Polypropylene
       - Polyethylene
       - EVOH
  • Ethylene oxide / glycol
  • Polysilicone production

Gases handled

  • Ammonia
  • Argon
  • Carbon dioxide
  • Carbon monoxide
  • Dust laden gases
  • Hydrocarbon gases
  • LPG, LNG
  • Mixed gases
  • Nitrogen
  • Oxygen
  • Process air
  • Refrigerants
  • VCM