A vertical single-stage integrally geared centrifugal compressor with flows to 850ACFM (1,450AM³/hr); Max. working pressure 1,440psia (100bar).

The LMC-331 is a vertical single-stage integrally geared centrifugal compressor.

- Flows to 850 ACFM (1,450 AM³/hr)
- Max. working pressure 1,440 psia (100 bar)

For over 50 years, Sundyne LMC integrally gear-driven centrifugal compressors have set the industry standard for high-head, low-flow fluid handling technology. Featuring a modular design with an independent wet-end and proprietary gearbox design, our engineers custom build every compressor to meet the unique Best Efficiency Point (BEP) of each customer’s application. With over one million possible configurations available, Sundyne integrally geared technology delivers superior performance over reciprocating compressors, allowing for maximized uptime and reduced maintenance costs. Combined, these feature benefits result in optimized productivity over the lifecycle of the unit. Backed by our global network of Authorized Service Centers, Sundyne compressors are the best in class option for a wide range of critical applications in the refining, LNG and gas production sectors, including mole sieve regeneration, polypropylene and lift gas duties.



Performance Envelope


Maximum Flow   850 acfm 1,450 am³/hr
Maximum Speed  34,200 rpm-60Hz 33,600 rpm-50Hz
Maximum Working Pressure  1,440 psi 100 bar
Temperature Range  -200 to 500°F -130 to 260°C
Maximum Motor Size  400 hp 298 kW
Hydro Test Pressure  1.5 Times Maximum Working Pressure
Min Casing Thickness  0.625 in 15.88 mm
Corrosion Allowance  0.125 in 3.18 mm
Impeller Clearance  0.03 to 0.05in .76 to 1.27mm
Shaft Diameter at Bearings  1.5in (38.1mm)
Mechanical Seal Sizes-Outboard... 1.25 in 31.8 mm
Mechanical Seal Sizes-Inboard  1.5 in 38.1 mm
Mounting  Vertical or Horizontal
Flanges  600# ANSI RF standard, other ratings available
Suction Flange  3 inches
Discharge Flange  2 inches
Gearbox Oil Temp Range (normal... 120 to 180°F 49 to 82°C
Minimum Gearbox Starting Temp  32°f (0°C) with light turbine oil - lower with approved synthetic oil
Gearbox Lubricant  ISO VG-46 General Purpose Oil
Gearbox Sump Capacity  7 Quarts (6.6 Liters)
Gearbox Lube System  Pressurized
Gears  Hardened and precision ground, helical and/or spur
Input and Idler Bearings  Deep groove, angular contact or solid journal as required
Output Bearings  Solid Journal or tilt pad thrust and radial as required
Coupling  Spline, standard flexible or spacer type
Materials of Construction  Castings (carbon steel, stainless steel); Impeller (17-4PHSS, Titanium)

Integrally Geared Centrifugal Single Stage Heavy Duty Compressor
Sundyne Corporation single-stage centrifugal compressors typically provide the same performance range as multi-stage, piston driven positive displacement compressors, allowing for smaller, easier to maintain equipment that requires overall less energy to keep running.

Sundyne Standard
In the 1960s, Sundyne (then Sundstrand Fluid Handling) emerged as the leading expert for integrally geared centrifugal compressors.

  • Oil and Gas Production
  • Reliable Centrifugal Compressors for Power Generation Fuel Gas Boost
  • LNG Liquid Natural Gas
  • Chemical Processing
  • Petrochemical
  • Gas Processing
  • Specialty Gases
  • Refining
  • Silicon Manufacturing

  • Atomizing Air
  • Hydrogen
  • Petroleum Production and Refining
  • Acetic Acid
  • Evaporators
  • Natural Gas
  • Butane
  • Gas Production
  • Nitrogen
  • Ethylene
  • Power Generation
  • Vapor Recovery
  • Natural Gas Extraction
  • Refrigeration
  • Flue Gas Desulphurization
  • General Processing Industry
  • HC Boost
  • Polypropylene
  • Acetylene
  • Clean Fuels
  • Hydrocarbon Processing
  • OEM
  • Fuel Gas
  • Lift Gas
  • Purge Gas
  • H2S Wet Gas
  • Chemical Transfer
  • Gas Boost
  • Recycle
  • Desulfurization
  • Stripper Overhead
  • Chemical Processing
  • Gasification
  • Corrosive Gases
  • Waste Gas
  • Ammonia
  • Pipeline Booster
  • Regeneration
  • Chlorine
  • MTBE Replacement