Centrifugal compression is fundamentally different from positive-displacement compression
Centrifugal compressors as:
Dynamic machines
A high-speed impeller accelerates the air and downstream diffuser passages convert part of that velocity into pressure. Multiple stages can be used where a larger overall pressure ratio is required.
This makes centrifugal compression fundamentally different from:
- Rotary Screw
- Reciprocating
- Scroll
- Tooth
- and other positive-displacement technologies
The basic centrifugal compression path
The uploaded centrifugal-compressor technical reference describes the same principle: air or gas enters the impeller eye, accelerates outward, and then passes through a diffuser where velocity is converted into pressure.
Important commercial boundary
The authoritative Reddy master classifies centrifugal compressors as:
Sourced on request / supplier confirmation required
It specifically says Reddy should treat centrifugal systems as sourced/project-engineered unless:
- Sales Capability
- Service Capability
and:
- Technical Capability
- are separately verified
- without evidence
Current benchmark / research library
It includes compressor references to Ingersoll Rand that explicitly cover reciprocating, oil-free, rotary and centrifugal compressors, and it also indexes MAN centrifugal-compressor resources.
Those sources may support later model/technology research.
They do not establish Reddy authorisation, inventory or capability.
The selection equation
Centrifugal selection is not:
“HOW MANY kW?”
It is:
“What operating point must the plant sustain safely & efficiently?”
01 — centrifugal compression is dynamic
Positive-displacement machines trap a defined volume and physically reduce that volume.
Centrifugal compressors instead use:
Velocity + aerodynamic energy conversion
That distinction affects:
- Performance Curves
- Part-Load Behaviour
- Surge
- Choke
- Controls
and:
Selection Method.
02 — the impeller adds energy
The impeller rotates at high speed and adds velocity to the incoming air.
03 — the diffuser converts velocity into pressure
Downstream diffuser passages convert part of the air's velocity into static pressure.
Therefore:
Impeller ≠ complete compression stage
The diffuser is fundamental to pressure recovery.
04 — operating point matters
Dynamic compressors have characteristic performance curves.
The actual operating point depends on:
- Flow
- Pressure
- Inlet Conditions
- Gas Properties
and:
- Control Position
- This is one of the defining differences from simple catalogue selection
05 — FAD must be read with pressure
A centrifugal machine should not be compared using only:
Maximum flow
The useful comparison is:
Verified flow at the required pressure & conditions
06 — motor power does not define capacity
Two compressor packages with similar motor ratings can operate at materially different:
- Flow
- Pressure
- Efficiency
- Control Range
and:
Ambient / Inlet Conditions.
Therefore:
KW ≠ FAD
07 — large-flow duty is a core centrifugal use case
Centrifugal compressors are typically considered at:
Larger flow rates
and:
CONTINUOUS INDUSTRIAL DEMAND.
This is legitimate relative positioning.
It does not establish one universal CFM threshold.
“Above x CFM, always use centrifugal.”
The crossover against screw or other technology depends on:
- Pressure
- Demand Stability
- Operating Hours
- Turndown
- Air Quality
- Specific Power
- Controls
- Lifecycle Cost
- and actual models
09 — continuous industrial demand can suit centrifugal technology
That makes it a strong evaluation path for certain large plant-air systems.
10 — variable demand requires special care
A centrifugal compressor can be technically excellent near an appropriate operating point yet perform differently at lower loads.
In practice:
PART-LOAD EFFICIENCY CANNOT BE ASSUMED FROM FULL-LOAD PERFORMANCE.
11 — centrifugal is not simply “a big screw compressor”
Selection requires application-specific review rather than a horsepower comparison with positive-displacement compressors.
The technologies behave differently.
12 — performance curves matter
A centrifugal compressor operates over a defined performance map.
Key points:
- Flow
- Pressure
- Inlet Conditions
- Gas Properties
and:
- Control Position
- as determinants of the operating point
13 — surge is a low-flow stability boundary
Operating too far from the stable design range can create:
SURGE RISK.
The uploaded technical reference describes surge as unstable low-flow operation that can include reverse-flow behaviour and potentially severe mechanical consequences.
14 — do not turn surge into a simple fixed CFM number
Surge depends on:
- Machine Design
- Pressure
- Inlet Conditions
- Control Position
and:
Manufacturer Map.
Therefore the acceptable boundary comes from the exact compressor's performance map.
15 — choke is the high-flow aerodynamic boundary
Key points:
Excessive flow conditions
as another operating boundary.
The uploaded technical reference describes choke as excessive flow through the aerodynamic passages that reduces pressure ratio and efficiency.
16 — the machine must operate between its stable aerodynamic limits
The useful design question is:
Where will the plant operate most of the time?
not merely:
What is the maximum nameplate flow?
17 — surge control is part of system design
The uploaded technical reference says stable operation can involve:
- Compressor Maps
- Anti-Surge Controls
- Recycle Valves
- Inlet Guide Vanes
- Speed Regulation
- Instrumentation
- Exact control architecture remains manufacturer-specific
18 — inlet guide vanes
Key points:
Inlet guide vanes
as a control element that can affect turndown and part-load performance.
Do not assume every centrifugal compressor uses the same vane/control arrangement.
19 — blow-off / bypass arrangements
Key points:
Blow-off or bypass
as part of centrifugal control architecture.
These functions should be understood within the manufacturer's anti-surge/control philosophy.
20 — recycle / blow-off can affect energy performance
If compressed air is produced and then recycled or released to protect the machine's operating envelope, part-load energy performance can differ substantially from simple full-load comparisons.
Therefore:
Control strategy belongs in lifecycle cost
21 — turndown must be verified
Turndown behaviour requires specialist understanding.
22 — base-load applications may be a strong fit
Where demand is large and relatively stable, centrifugal architecture can deserve serious evaluation as a:
Central plant / base-load technology
This follows the source's positioning around larger flow and continuous demand.
23 — variable plants may need base / trim architecture
A plant with large base demand and substantial variable demand may require:
Centrifugal Base Load
plus:
Another Trim Technology
or:
- Multiple Coordinated Machines
- depending on the measured load profile
- The specific architecture requires project engineering
24 — do not force one centrifugal machine to solve every load condition
If process demand swings far below the machine's efficient/stable range, the better system may involve:
- Machine Sequencing
- Multiple Sizes
- Trim Capacity
- Storage
- or another architecture
25 — single-stage centrifugal compression
Single-stage centrifugal compression as:
One impeller / diffuser stage
providing a defined pressure rise.
26 — single-stage does not mean “small”
Stage count describes the compression architecture.
It does not automatically define physical machine size or motor power.
27 — single-stage can appear in lower-pressure or specialised dynamic duties
Key points:
- Lower-Pressure Duties
- Specialised Dynamic Compression
and:
Some Blower / Process Applications.
28 — multi-stage centrifugal compression
These machines use:
A series of impellers & diffusers
often with:
Intercooling
to build required pressure across several stages.
29 — multiple stages should follow pressure requirement
Do not select more stages simply because:
More stages sound more advanced
Stage architecture follows:
- Required Pressure
- Flow
- Thermal Design
- Machine Architecture
30 — intercooling
Cooling between stages can:
Reduce Air Temperature
and:
- Reduce Density-Related Compression Work
- This supports intercooling as a core multi-stage function
31 — intercooling can create condensate
In practice:
CONDENSATE MANAGEMENT MAY BE REQUIRED AS MOISTURE DROPS OUT.
Therefore:
Intercooler design + drainage
belong together.
32 — intercooling ≠ final air drying
Cooling between stages controls compression temperature.
It does not automatically satisfy the process pressure-dew-point requirement.
A downstream dryer may still be required.
33 — cooling architecture must be verified
The centrifugal hub says plant integration can involve:
Cooling Water
or:
Air Systems.
Therefore:
Centrifugal ≠ automatic water-cooled
- Centrifugal ≠ automatic air-cooled
- 34 — cooling-water requirements are model-specific
If a machine uses water cooling, verify:
- Flow
- Temperature
- Pressure
- Water Quality
- Heat-Rejection Requirement
- from manufacturer documentation
- No universal values are supported here
35 — inlet conditions matter
This includes:
Inlet conditions
among the variables that define operating point.
Therefore site:
- Ambient Temperature
- Elevation
- Humidity
- Inlet Pressure / Restriction
- can matter
- Exact correction factors remain model-specific
36 — inlet filtration is part of plant integration
The centrifugal hub explicitly lists:
Inlet filtration
as part of the package/system design.
A fouled or restrictive intake can affect machine operation.
37 — do not ignore inlet pressure drop
High-flow machines can be sensitive to system restrictions.
The actual manufacturer should define acceptable inlet conditions and filtration limits.
38 — oil-free air path can be an important centrifugal attribute
Centrifugal technology can be relevant where:
Oil-free air path
is important.
The compression path can remain oil-free while lubrication exists in separate gear/bearing systems outside the air stream.
39 — oil-free air path ≠ no lubricant anywhere
A compressor can have:
- Lubricated Bearings
- Gearing
- or other mechanical systems outside the compressed-air path
Therefore:
Oil-free ≠ zero lubricant inside the entire machine
40 — oil-free centrifugal ≠ complete air-quality specification
Point-of-use quality can still depend on:
- Moisture
- Particles
- Inlet Contamination
- Pipework
- Receivers
- Dryers
- Filters
- and maintenance condition
41 — class 0 must be model-specific
The authoritative centrifugal page explicitly warns against implying Class 0 certification without evidence.
Therefore:
Centrifugal ≠ automatic class 0
42 — smooth flow can be an architectural advantage
The Reddy hub identifies:
Smooth flow
as one reason centrifugal technology can suit large central-plant duty.
Do not convert this into unsupported numerical pulsation claims.
43 — central-plant architecture
Key points:
Central-plant architecture
as an important centrifugal application context.
This makes centrifugal compressors particularly relevant to large coordinated plant-air systems.
44 — the compressor room must be engineered around the machine
The compressor room must be designed around the machine's:
STABLE OPERATING ENVELOPE.
That includes more than physical floor space.
45 — plant integration variables
The authoritative hub identifies:
- Cooling Water / Air Systems
- Intercoolers
- Condensate Drainage
- Inlet Filtration
- Vibration
- Lubrication Systems Outside the Air Path
- Control Logic
- as package-level engineering variables
46 — foundation & alignment require model / project engineering
The uploaded technical reference says long-term centrifugal reliability depends partly on precision alignment and strain-free piping.
These are important concepts.
Exact installation tolerances remain manufacturer-specific.
47 — piping strain should not be ignored
A large compressor nozzle should not become a structural support for improperly aligned piping.
Actual allowable nozzle loads belong to the manufacturer's installation data.
48 — vibration is a major condition indicator
The authoritative hub specifically includes:
Vibration
within centrifugal plant integration.
The uploaded reference also identifies vibration monitoring as part of reliability management.
49 — no universal vibration limit
Acceptable vibration depends on:
- Machine
- Bearing System
- Speed
- Measurement Location
- Applicable Standard / OEM Limit
50 — condition monitoring can be particularly important
Large centrifugal assets often justify:
- Condition Monitoring
- Specialist Inspections
and:
- Planned Overhaul Strategies
- because downtime consequence can be substantial
51 — monitor pressure
Pressure trends can help identify:
- Demand Changes
- Control Behaviour
- Restriction
- and abnormal operating conditions
- Exact alarm values remain manufacturer/project-specific
52 — monitor temperature
Temperature can be relevant across:
- Stages
- Bearings
- Coolers
and:
- Discharge
- Again, exact limits are model-specific
53 — monitor power
The uploaded technical reference includes:
POWER
among useful continuous monitoring variables.
Power trends can support operating and efficiency analysis.
54 — monitor efficiency / performance trends where practical
A centrifugal compressor can lose performance gradually due to changing conditions.
Trend data can help distinguish:
Normal Load Change
from:
Developing Machine / System Deterioration.
55 — fouling can reduce performance
The uploaded centrifugal reference identifies:
Fouling
as one mechanism that can reduce capacity and raise energy consumption.
56 — rotor imbalance can affect reliability
The same reference identifies:
Rotor imbalance
as a potential condition issue.
Exact diagnosis requires specialist measurement.
57 — bearing condition matters
Key points:
Bearing distress
as another possible deterioration mechanism.
Do not infer bearing condition from operating hours alone.
58 — seal condition can matter
The same technical reference identifies:
Seal leakage
as a potential reliability issue.
Seal architecture differs widely by compressor and service.
59 — cooler degradation can affect performance
The uploaded reference lists:
Cooler degradation
among conditions that can reduce performance.
This reinforces the importance of intercooler / aftercooler condition.
60 — changing inlet / gas conditions can move the operating point
Changing gas conditions can affect compressor performance and stability.
Site & inlet conditions matter
Process-gas details belong on later specialised pages.
61 — CENTRIFUGAL vs ROTARY SCREW
This comparison should remain application-led.
Centrifugal
Often deserves evaluation for:
- Large Flow
- Relatively Continuous Demand
- Central Plant Architecture
- Oil-Free Air Path
- where verified
Rotary screw
Often deserves evaluation across a broader range of smaller/medium industrial duties and varying control architectures.
No universal winner.
62 — CENTRIFUGAL vs RECIPROCATING
Centrifugal
Dynamic high-flow compression.
Reciprocating
Positive-displacement piston compression, often attractive for different flow/duty/pressure profiles.
Technology selection should follow the required operating envelope.
63 — CENTRIFUGAL vs OIL-FREE SCREW
Both may provide verified oil-free air paths.
Compare:
- FAD
- Pressure
- Operating Hours
- Turndown
- Input Power
- Cooling
- Control Strategy
- Air-Quality Documentation
- Service Infrastructure
- Lifecycle Cost
64 — do not compare centrifugal & screw using motor power alone
This is especially important because their:
- Performance Curves
- Part-Load Behaviour
and:
- Control Methods
- can differ substantially
65 — specific power should be compared at relevant operating conditions
Where verified performance data exist, compare:
Package input power / delivered airflow
at the required pressure and rating conditions.
Do not use a single full-load number to represent every operating point.
66 — annual load profile is critical
A plant may operate:
90% of Time Near Base Load
or:
Constantly Between Low & High Demand.
Those two plants may justify very different centrifugal strategies even if peak CFM is identical.
67 — load histogram / demand measurement can improve selection
Before selecting a large centrifugal plant, useful project evidence can include:
- Flow Logging
- Pressure Logging
- Operating Hours
- Existing Compressor States
- Power Data
- Production Schedule
- This supports real demand-profile engineering
68 — redundancy should follow production consequence
Ask:
What happens if the centrifugal compressor is unavailable?
Large central machines can carry substantial plant load.
The answer may influence:
- Number of Machines
- Base / Trim Strategy
- Standby Capacity
- Temporary-Air Planning
- Maintenance Windows
69 — do not assume one large machine is always better than multiple machines
One large centrifugal compressor can simplify some architectures.
Multiple machines can improve:
- Demand Matching
- Maintenance Flexibility
- Redundancy
- depending on the application
- Use lifecycle analysis
70 — do not assume multiple machines are always better
Multiple machines add:
- Controls
- Valves
- Maintenance Points
- Sequencing Requirements
- and potentially higher capital complexity
Again:
Application first
71 — air treatment remains part of the system
Even where centrifugal compression provides an oil-free air path, downstream air may still require:
- Drying
- Filtration
- Condensate Management
and:
- Point-of-Use Treatment
- according to the process
72 — interstage condensate & final air quality are different questions
Interstage moisture removal can occur as air cools.
The final process dew point must still be established separately.
73 — receiver / storage requirement should have a purpose
Do not assume centrifugal compressors:
“Never need receivers.”
Storage can still support:
- System Stability
- Short Demand Changes
- Control Integration
- Treated-Air Strategy
- depending on plant design
74 — plant controls are essential
A central centrifugal plant should consider:
- Compressor Control
- Anti-Surge Logic
- Plant Sequencing
- Pressure Control
- Trim Strategy
- Standby Logic
- where applicable
- Exact implementation must come from the manufacturer/system engineer
75 — maintenance should be condition- & model-specific
Major Overhaul Intervals.
Manufacturer documentation and machine condition govern.
76 — specialist inspection may be justified
Specialist inspection and planned overhaul strategies can be justified for large centrifugal assets.
77 — current commercial capability must be verified before quotation
Centrifugal performance and commercial capability remain supplier/model-specific.
Therefore an enquiry may be classified as:
Sourced on request
or:
Project engineered
until the actual supplier and model are confirmed.
78 — model data required before product publication
For each centrifugal compressor, verify:
Manufacturer
Exact Model
Centrifugal Architecture
Single / Multi-Stage
Integrally Geared / Other Architecture Where Applicable
FAD / Flow
Working Pressure
Rating Conditions
Motor / Driver Rating
Package Input Power
Specific Power Where Available
Minimum Stable Flow
Control Range
Inlet Guide Vane / Control Architecture
Blow-Off / Recycle Strategy
Anti-Surge System
Cooling Arrangement
Intercooling
Cooling-Water Requirement Where Applicable
Inlet Conditions
Air-Quality Documentation
Vibration Monitoring
Control / Communication Features
Service Requirements
Dimensions / Weight
Current Availability
Reddy Capability / Relationship State
No nearby model data should be substituted.
79 — customer data to request
For a centrifugal compressor enquiry:
Application
Plant-Air or Process Duty?
Required FAD
Required Pressure
Minimum Demand
Average Demand
Peak Demand
Peak Duration
Annual Operating Hours
Existing Compressor Plant
Current Load Profile
Existing Pressure Variation
Air-Quality Requirement
Required PDP
Electrical Supply
Cooling-Water Availability
Ambient / Inlet Conditions
Site Elevation if Relevant
Available Space
Existing Controls
Required Redundancy
Maintenance Window
What Happens if One Machine Is Offline?
Future Expansion
Required Manufacturer Documentation
80 — centrifugal selection gate
Is the demand large enough to justify dynamic compression?
Evaluate actual models.
Is demand relatively continuous?
Centrifugal deserves stronger evaluation.
What FAD?
At required pressure.
What is the minimum demand?
Essential for surge/turndown review.
What is the normal operating point?
Do not size only from peak demand.
What are the inlet conditions?
They affect the operating point.
Single-stage or multi-stage?
Pressure/application-specific.
How will interstage heat be managed?
Verify architecture.
What is the stable operating envelope?
Use manufacturer maps.
How is surge controlled?
Manufacturer/system-specific.
How is part load controlled?
IGV, blow-off/bypass, speed or other verified architecture.
What cooling infrastructure is required?
Site-specific.
What air quality is required?
Oil-free path alone is not the final specification.
What happens if the machine is offline?
Plan redundancy.
Who can support the machine through its lifecycle?
Verify competence before purchase.
Then select the actual compressor architecture.
Controlled centrifugal technology map
Engineering Area | Centrifugal Design Question |
|---|---|
Compression principle | Dynamic impeller + diffuser |
Best-fit demand | Generally larger, relatively continuous flow |
Operating point | Flow + pressure + inlet conditions + controls |
Low-flow boundary | Surge / stable minimum-flow limit |
High-flow boundary | Excessive-flow / choke region |
Staging | Single or multiple stages depending on duty |
Intercooling | Common in multi-stage architecture |
Oil-free path | Possible/typical in verified plant-air designs |
Part-load control | Requires specialist model/control review |
Cooling | Air or water depending on package |
Monitoring | Pressure, temperature, vibration, power and other model data |
Air quality | System- and process-dependent |
Lifecycle service | Specialist, model-specific |
Universal performance winner | No |
Centrifugal air compressors in one line
A centrifugal compressor is a dynamic machine that uses a high-speed impeller to add velocity and a diffuser to convert that velocity into pressure
And it should be selected around the actual flow, pressure, operating point, stable aerodynamic envelope, stage architecture, control strategy, cooling, air quality and lifecycle requirement
Closing
- Centrifugal selection is not a nameplate exercise
- It is an operating-envelope decision
The architecture is:
It also establishes the central control boundary: inlet guide vanes, blow-off/bypass arrangements, surge margin and turndown must be understood properly, and part-load efficiency cannot be inferred from full-load performance.
Single-stage centrifugal machines require operating-point review against flow, pressure, inlet conditions, gas properties and control position, with the manufacturer's performance map governing surge and excessive-flow boundaries.
The uploaded technical reference further supports dynamic compression, surge/choke boundaries and monitoring of vibration, pressure, temperature, power and efficiency as key lifecycle considerations.
Reddy compressors
- Compressed air. engineered for uptime
- Centrifugal air compressors
- Define the flow
- Define the pressure
- Map the load profile
- Verify the operating point
- Respect surge & choke boundaries
- Select the stage architecture
- Engineer intercooling & condensate management
- Verify part-load control
- Engineer cooling & inlet conditions
- Monitor machine health
- Plan redundancy
- Verify lifecycle support
- Claim only verified model performance
- Primary CTA
Request a Centrifugal Compressor Engineering Assessment
Secondary CTAs
Submit Your Plant-Air Demand Profile
Compare Centrifugal vs Rotary Screw
Review Single-Stage vs Multi-Stage Centrifugal
Review Surge / Turndown Requirements
Verify Centrifugal Compressor Sourcing & Capability
Field guide
Centrifugal compressors: what to know before you specify one
A centrifugal compressor is a dynamic machine. An impeller spins the gas to high velocity and a diffuser turns that velocity into pressure. A screw or reciprocating compressor instead traps a volume and reduces it. The difference decides where each is used: centrifugal machines suit very large, continuous flows, and positive-displacement machines suit a wide range of plant and mobile duties.
Centrifugal or rotary screw
| Parameter | Centrifugal | Rotary screw |
|---|---|---|
| Principle | Dynamic | Positive displacement |
| Best range | Very high flow | Low to medium-high flow |
| Part load | Needs careful control | Generally wider turndown |
| Oil-free duty | Strong | Available in specialised designs |
| Typical duty | Large continuous process loads | Industrial plant air and mobile duty |
Neither is better in general. The choice follows flow, pressure ratio, gas, duty cycle, inlet conditions, load variation, reliability needs and lifecycle cost.
Common arrangements
- Integrally geared: pinions on a central bull gear, each stage at its own best speed, with intercooling. Common for oil-free plant air and industrial gases.
- Single-shaft: several impellers on one rotor, used for high-power process gas, LNG and pipeline service.
- Barrel and horizontally split casings: barrel for higher pressure and containment, split for easier internal access where pressure and gas allow.
Surge and choke set the operating window
A centrifugal compressor works efficiently only inside a defined envelope. Surge happens when flow falls below the stable limit: forward flow can break down, pressure and flow oscillate, and seals, bearings and impellers can be damaged. Anti-surge control recycles gas from discharge to suction as the surge line is approached, and it needs fast instruments, a correctly sized recycle valve and an accurate compressor map. Choke is the other end, when the passages cannot pass more flow, so pressure ratio falls and power rises. Select for the whole expected range of operation, not only the design point.
Capacity control
| Method | Note |
|---|---|
| Inlet guide vanes | More efficient than throttling at part load |
| Variable speed drive | Shifts the performance curve; check the motor, harmonics, speed limits, rotor dynamics and cost |
| Discharge throttling | Simple but wastes energy |
| Blow-off or recycle | Protects the machine but burns power on air that is not used |
Selecting by process, not catalogue
- Gas data: composition, molecular weight, suction temperature and pressure, moisture, and whether it is flammable, toxic or corrosive.
- Performance: normal, minimum and maximum flow, discharge pressure, operating cases, duty and turndown.
- Site: ambient temperature, altitude, cooling-water quality, power supply, dust and space. In India, heat, dust, cooling-water limits and voltage variation all affect the result.
- Reliability: availability needed, standby, spares, maintenance capability and remote monitoring.
- Cost: purchase, energy, maintenance, downtime and expected life.
A machine can be efficient at its design point and spend most of its life at part load, so judge the whole system over the real operating profile, not the peak efficiency on the data sheet.
Reliability and what usually goes wrong
Good practice covers precision installation (foundation, alignment, piping strain, oil-system cleanliness), disciplined commissioning (oil flushing, instrument calibration, trip and anti-surge tests, a recorded baseline), condition monitoring (vibration, bearing temperature, axial position, oil and seal-gas pressure, power) and performance monitoring, because a machine can be mechanically healthy while becoming aerodynamically poor. Overhaul by condition and risk as well as hours.
| Failure | Typical signs and causes |
|---|---|
| Fouling | Lower capacity, higher power and discharge temperature, less surge margin |
| Imbalance | Higher vibration at running speed from deposits, erosion or assembly error |
| Bearing damage | Lubrication failure, heat, misalignment, contamination |
| Dry-gas seal failure | Contaminated seal gas, wrong differential pressure, liquid carry-over |
| Cooler degradation | Hotter gas and more power |
| Repeated surge | Damage to seals, bearings, impellers and piping |
"Oil-free" describes the compressed gas, not the whole machine: gears and bearings are still lubricated, and the design keeps oil out of the gas stream.
For the machines Reddy Compressors handles in this area, read how centrifugal compressors work. Process-gas duties need specialist selection; start with the equipment selection enquiry.