Aerzener Maschinenfabrik GmbH

Model GM ... dz - Direct-Drive High-Pressure Positive Displacement Blowers



The direct-drive GM ... dz blowers from AERZEN are high-performance machines. 1 or 2 stage design, with separate pressurised oil lubrication for the oil-free transport and compression of air, neutral gases, and gas mixtures. Highly advanced and extremely robust Roots-type products. Available in a wide range of special materials and seals, such as stainless steel or as acetylene boosters according to TRAC norms.



  • Housing with circular flanges and o-ring seals, lube- and purge oil supply by complete oil unit, oil chambers under gas pressure.

Shaft Sealings

  • Conveying chamber by combined oil slinger piston ring labyrinth seals with condensate chamber between the piston rings or shaft seal ring - piston ring labyrinth seal.
  • The drive shaft is sealdes via compressed-oil-purged double-acting mechanical seal.

Direction of Flow

  • Vertical, from top to bottom.


  • Direct coupling with motor or via flexibly coupled spur gear.


  • Max. pressure increases of 1,0 bar abs. to 2,0 bar abs.
  • Housing compression-proof for PN 25 with o-ring sealings
  • Splash lubrication
  • Driving shaft seal by 2 shaft seal rings with grease trap
  • Drive direct via flexible coupling or overhung via narrow v-belt

  • Type of technology: Positive Displacement Blowers
  • Volume flow: 35.316 to 3,531.6 CFM
  • Medium: air , neutral gases
  • Conveying: oil-free
  • Positive Pressure: Max. 362.59 psi

Process Gas Blowers from Aerzen Function Reliably in all Idustries, in all Markets, and in all Countries On Earth.

AERZEN offers the process gas and coolant industries an incredibly broad spectrum of blower technologies – perhaps the broadest of any manufacturer. Machines that operate as stand-alones, in machine or container combinations, onshore and offshore. In every single key industrial application:

Chemical and Petrochemical Industries

  • Compression of H2 and CH mixtures
  • Acetylene
  • Ethylenes
  • Lime kiln gas
  • Rich gas
  • Synthesis raw gas
  • Butadiene
  • Vinyl chloride
  • Hydrogen sulphide
  • Hydrogen


  • Hydrocracking
  • Hydrosulphurisation
  • Fractionating
  • Reforming
  • Catalytic cracking
  • PSA
  • Flare gas
  • Compression of H2 and CH mixtures Energy production
  • Gas turbine supply
  • Steam

Oil & Gas Conveyance and Storage

  • VOC recovery
  • Natural gas compression
  • Pipeline booster
  • Underground gas storage

Industrial Gases

  • Hydrogen generation
  • Air separation
  • Argon
  • Syngas Coolant industry
  • Coolants (R1270, R290, etc.)

Helium Refrigerator and Liquefier

  • Helium


  • Natural gas compression


  • Waste steam

Coking Plants

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