Engineered MSG® Centrifugal Air & Gas Compressors

Ingersoll Rand's MSG® (Multi-Stage Geared) Air & Gas Compressors are expertly crafted to boost productivity, lower operating costs, and simplify maintenance in your production environment. Each MSG® compressor is custom-engineered to meet the specific demands of your application, delivering exceptional performance even under the most challenging conditions. With a wide range of configurations offering flow rates from 4,200 to 230,000 m³/h (2,500 to 135,000 CFM), these compressors are designed to precisely align with your process requirements. Discover the ideal combination of efficiency and reliability with Ingersoll Rand's MSG® Air & Gas Compressors.

Oil-free:

100% oil-free per ISO 8573-1 certification
Prevents system contamination
No costly waste disposal associated with oil-laden condensate
Eliminates the expense and maintenance of oil separation filters at the discharge.

Efficient Design: Highly efficient aerodynamic components combine with low mechanical losses and power conserving IGV to provide up to 5% better specific power than competitive models.

Robust Reliability: Industry-leading reliable design with time-tested split pinion bearings, AGMA 13 gearing, a robust thrust management system and stainless steel compression elements.

Intuitive Control: MAESTRO controllers include a web server and USB port, can monitor and control multiple units, and will integrate with on-site host systems to optimize performance.

Operational Flexibility: With a turndown range that typically exceeds 30%, MSG® compressors can be used in a wider variety of demand scenarios without the need to unload or shut down during periods of low compressed air demand. The standard inlet guide vane

Less Downtime: Our compressors are designed to simplify installation and maintenance with a horizontally split gearbox and cleanable in-place cooler bundles.

Low Total Cost of Ownership: The energy required to power a compressed air system is the largest cost associated with a compressor. That is why it is important to consider the total life-cycle cost of operating the compressor, including the initial investment, energy consumption and maintenance costs.

Low Compressor Operating Lifecycle Cost:

Excellent efficiencies at full load, part load and no load
Low maintenance cost
Increased uptime from high-reliability design
No sliding or rubbing parts in the compression process that can cause wear and efficiency loss

Ease of Operation & Maintenance

MSG® compressors are user-friendly and designed for simplicity:

Durable Compression Elements: No periodic replacement needed
Accessible Design: Horizontally split gearbox for quick inspections
Easy Cleaning: Removable intercooler and aftercooler bundles

Simple Installation

Installation is streamlined for efficiency and convenience:

Integrated Design: Compressor, lubrication system, intercoolers, coupling, piping, etc., all can be mounted on a common base
No Special Foundations Needed: Simplified setup process
Compact Layout: Reduced floor space requirements
Flexible Connection Points: Adaptable to site-specific needs
Pulsation-Free Operation: Dynamic compression eliminates the need for dampening equipment

MSG® centrifugal compressors are engineered for excellence:

Configurations include one, two, or three rotors with up to six stages per gearbox
Horizontally Split Gearbox for Easy Maintenance
Custom gearing for Optimum Speed and Efficiency
Tilting Pad Pinion Bearings for High Reliability
Standard Thrust Collars on the Pinion Shaft
Seal Options Ingersoll Rand offers a complete range of seal arrangements to meet the specific needs of your application:
- Standard Labyrinth-style
- Babbitted-style
- Carbon Ring
- Single, Tandem, or DoubleDry-face
Gas Flow Arrangement: MSG® TURBO-AIR centrifugal compressors are designed with an innovative arrangement of gas flow components.
Customized PLC-Based Controls: PLC-based systems offer advanced control for packages with high input/output (I/O) counts, multiple gas circuit control loops, or multi-process applications. Ingersoll Rand can design, program, and supply PLC systems from all major suppliers, fully integrated and wired to your compressor package.

Air Flow Diagram

01: Compressor inlet

02: First-stage compressor volute

03: Coolant in

04: Coolant out

05: First-stage intercooler

06: Second-stage compressor volute

07: Second-stage intercooler

08: Third-stage compressor volute

09: Compressor discharge

Cross-sectional View of a Typical Three-rotor Process Gas Compressor

One, two or three rotors, up to six stages per gearbox
Horizontal splitline(s) for easy access to parts
Engineered seal designs
NACE-compliant scrolls and inlets can be manufactured from steel or stainless steel according to project requirements

ISO 8573-1 Class 0
American Petroleum Institute (API)
ISO 9001:2008
ISO 14001:2004

Model	Standard Input Power	Discharge Pressure	Inlet Flow
MSG® 2/3 Centrifugal Air & Gas Compressor	Up to 4,100 kW (5,500 hp)	Up to 100 barg (1450 psig)	4,200 to 17,000 m³/h (2,500 to 10,000 CFM)
MSG® 4/5 Centrifugal Air & Gas Compressor	Up to 4,850 kW (6,500 hp)	Up to 100 barg (1450 psig)	12,000 to 30,000 m³/h (7,000 to 17,700 CFM)
MSG® 8/9 Centrifugal Air & Gas Compressor	Up to 7,640 kW (10,000 hp)	Up to 100 barg (1450 psig)	28,000 to 60,000 m³/h (16,500 to 35,500 CFM)
MSG® 12/14/16 Centrifugal Air & Gas Compressor	Up to 11,185 kW (15,000 hp)	Up to 100 barg (1450 psig)	51,000 to 100,000 m³/h (30,000 to 59,000 CFM)
MSG® 18 Centrifugal Air & Gas Compressor	Up to 14,900 kW (20,000 hp)	Up to 41 barg (600 psig)	77,000 to 135,000 m³/min (45,250 to 80,000 CFM)
MSG® 25 Centrifugal Air & Gas Compressor	Up to 16,400 kW (22,000 hp)	Up to 41 barg (600 psig)	85,000 to 230,000 m³/h (50,000 to 135,000 CFM)

We are capable of understanding client specific needs and requirements, allowing us to be with you through every step of your project. We can quickly design the most effective customized solution, giving you total peace of mind.

With our main manufacturing facilities in Wujiang (China), Buffalo (US), and Vignate (Italy), plussales and service locations worldwide, Ingersoll Rand is a global company with a commitment to meeting your needs with exceptional centrifugal compressor technology while exceeding your expectations with unequaled service & support.

MSG® centrifugal compressors can be fully customized to meet your specific multi-process needs. Some examples of applications, mainly in the air separation industry, where MSG® compressors have been effectively utilized for multiple processes:

Main Air Compressor / Booster Air Compressor (MAC/BAC)
Main Air Compressor / Nitrogen Product Compressor (MAC/GAN)
Main Air Compressor / Nitrogen Recycle Compressor (MAC/NRC)
Nitrogen Recycle Compressor / Nitrogen Feed Compressor
And many others

MSG® Performance Ranges

Ingersoll Rand's MSG® Centrifugal Compressors are proven in a number of different industries:

Air Separation
Power Generation
Carbon Capture
Chemical & Petrochemical
Oil & Gas
Liquefied Natural Gas (LNG)
Biogas
Hydrogen
General Manufacturing

We offer a broad portfolio of reliable centrifugal products that will adapt to your application. Ingersoll Rand MSG® Centrifugal Compressors can produce compressed air for the most demanding requirements. Here are some of the common applications:

MSG® Centrifugal Air Compressors Applications

Industrial gases (main air compressors and boosters)
Process air
Instrument air
Soot blowers
Large plant air
Decoking air
Pneumatic conveying
Multiple processes (e.g. Air & Nitrogen)

MSG® Centrifugal Gas Compressors Applications

Fuel gas boosting
Natural gas gathering
Refrigeration gas
Carbon monoxide
CO2 (wet or dry)
Flue Gas
SynGas
Recycle gas
Landfill gas

Feature	MSG® CENTRIFUGAL COMPRESSORS	OTHER COMPRESSORS
LOW MAINTENANCE	Compression elements don't require periodic replacement Accessible horizontally split gearbox for quick inspection Removable intercooler and aftercooler bundles for easy cleaning Oil and seal gas filter elements are easily replaced online	Require regular maintenance, such as replacement of piston rings, gland packing and valve plates, or periodic replacement of air ends Result in high operating expenses and significant machine downtime
OIL-FREE GAS	100% oil-free gas Prevents system contamination No costly waste disposal associated with oil-laden condensate Eliminates the expense and maintenance of oil separation filters at the discharge	Oil filters must be installed at discharge Potential for oil carryover to foul the process Oil-free claim is based dependent on uninterrupted seal gas supply
RELIABILITY	Centrifugal compressors have industry leading 99.7% MTBF Conservative high-quality gear design and stainless steel compression elements Long-life pinion bearing design Highly resilient to surge events	Contacting compression elements are subject to wear Limited rotating element life Designed-in wearing items to generate aftermarket revenues Require costly surge control systems to avoid damage to seals and bearings
OPTIMUM CONTROL	Inlet guide vane control and bypass for consistent gas delivery Automatic operation and precision control for most operating conditions State-of-the-art MAESTRO-suite of controls PLC control systems available	Expensive, variable-frequency controls may be required to adjust capacity Cylinder unloading for stepped flow control can result in complicated process control due to sudden changes in capacity
COMPACT INSTALLATION FOOTPRINT	Single-lift skid or flexible modules Easy installation with no special foundation requirements Reduced floor space, easy component accessibility Site connection point flexibility Dynamic compression is pulsation-free Essentially vibration-free	Require additional, external speed-changing gearbox for drivetrain input Use of large pulsation dampers to reduce pressure fluctuations Multiple cylinders require more space for installation Require large and deep foundation to handle heavy weight and unbalanced forces Precautions must be taken to prevent transmission of vibration to other equipment

Genuine Spare Parts
Field Service
- Installation
- Startups
- Vibration analysis
- Turnaround inspections
- Field balancing
- Drive motor alignment
- Control system services
- Performance evaluation
- Preventative maintenance
- Diagnostic checks

Performance Enhancing Upgrades

Aerodynamic Modifications
Additional Upgrades
- Duplex Oil Filters
- Duplex Oil Coolers
- Control Valves
- Cooler Bundles
Inlet Guide Vanes
Techtrol Gold Centrifugal Compressor Lubricant
Xe-145F Series Centrifugal Compressor Controller
MAESTRO Universal Centrifugal Compressor