Pressure
Unnecessary pressure is expensive
CSD models are offered across multiple pressure variants. Use that flexibility to meet the process requirement instead of carrying excess pressure through the entire plant.
Kaeser CSD
CSD SERIES · 60–125 HP
A KAESER fixed-speed rotary screw compressor family for industrial plants that need substantial, dependable compressed-air capacity with pressure-specific sizing, SIGMA CONTROL 2, Electronic Thermal Management, speed-controlled cooling and a service-oriented package architecture. Standard models span CSD 90 through CSD 175.
60–125 hp255–689 acfm100–217 psi model-dependentIE4 fixed-speed platformSIGMA CONTROL 2T dryer versions available
Demand / problem
At 60–125 hp, excess pressure, poor demand matching, inadequate storage or a badly planned compressor room can cost far more than the difference between two machine prices.
Engineering mechanism
The CSD package combines the motor, timing gears and airend with ETM, a redesigned inlet path and speed-controlled cooling under SIGMA CONTROL 2.
Ownership value
Large removable doors, externally accessible coolers, condition monitoring and optional dryer/heat-recovery configurations support a plant-air system designed for long operating hours and practical maintenance.
255–689 acfm
Pressure-specific sizing
SIGMA CONTROL 2
Electronic Thermal Management
Open service layout
Optional T dryer versions
The actual system problem
A 100 hp compressor can be the right machine and still be the wrong air system.
CSD selection starts with plant demand, the lowest acceptable point-of-use pressure, pressure losses, operating profile, air quality, storage, redundancy and future growth. The compressor is the generating core—not the entire compressed-air strategy.
Demand
Baseload and peak demand are different problems
Average plant consumption, short peaks and minimum overnight demand should be separated before fixed-speed capacity is selected.
Air quality
Moisture and contaminants need their own plan
The base CSD is a fluid-injected compressor. Drying, filtration and any formal purity class are separate treatment decisions unless a T or engineered treatment configuration is selected.
Thermal design
Heat rejection is part of the room design
A compressor in this power class moves significant heat. Cooling-air path, room ventilation and heat-recovery opportunities belong in the project from the start.
Application fit
Built for sustained industrial compressed-air demand.
The CSD family sits in KAESER’s mid-sized industrial range and is strongest where the facility has a meaningful baseload, long operating hours and a demand profile that justifies 60–125 hp fixed-speed capacity. Highly variable demand should be treated as a separate system-design decision rather than forcing a fixed-speed answer.
Strong fit
Production plants
CSD capacity suits facilities with multiple production cells, CNC equipment, pneumatic automation, assembly systems and other continuous plant-air users.
Strong fit
Stable baseload duty
Fixed-speed CSD is a natural candidate where demand remains relatively steady for meaningful portions of the operating day.
Strong fit
High-pressure variants
Model-dependent selections extend up to 217 psi, allowing pressure to be matched more precisely to the actual process.
Qualify treatment
Defined dry-air requirement
Use T versions or an engineered dryer/filtration train where pressure dew point and contaminant limits are part of the process specification.
System-level decision
Critical uptime
Where losing compressed air stops production, design redundancy, receiver storage, master control and maintenance isolation around the actual business risk.
Integrated control
Managed compressor operation
SIGMA CONTROL 2 coordinates compressor operation, monitors relevant operating states and supports plant communication options.
Select from demand backwards
Model first means pressure-and-flow first—not horsepower first.
The CSD model table gives complete-system flow at each working pressure. That relationship is more useful than a single headline cfm number because the same nominal motor produces different usable flow as pressure changes.
Measure demand
Record average, peak and minimum air consumption, production schedule and expansion plans.
Set point-of-use pressure
Start with the process requirement, then add only verified treatment and distribution losses.
Choose air quality
Define pressure dew point, particles, oil aerosol and oil vapour from the downstream process backwards.
Model system architecture
Size receiver storage, redundancy, control bands and distribution before deciding whether one CSD or a multi-compressor system is better.
Confirm operating profile
Use CSD fixed speed where the measured operating profile supports sustained baseload duty.
Product architecture
CSD is engineered as a coordinated compressor package.
The CSD package integrates the motor, timing gears and airend with ETM, a redesigned inlet valve, larger inlet filtration, variable cooling-air control, fluid separation, moisture separation, service access and controller protection.
Compression
SIGMA PROFILE airend
The CSD uses a single-stage, fluid-cooled rotary screw airend with KAESER SIGMA PROFILE geometry.
Drive architecture
Optimized direct-drive package
The integrated motor, timing-gears and airend package is selected around efficient airend speed at each operating point.
Thermal control
Electronic Thermal Management
ETM dynamically controls fluid temperature to reduce internal condensation risk and coordinate thermal performance with operating conditions.
Cooling
Speed-controlled cooling fan
SIGMA CONTROL 2 can vary CSD cooling airflow with ambient conditions and operating state rather than running maximum cooling airflow continuously.
CSD technical framework
CSD fixed-speed model matrix—use the pressure pair that applies.
Use the exact model and working-pressure row that matches the application. Complete-system flow changes with pressure and remains model-specific.
| Model | Nominal motor | Working pressure → complete-system flow | Dimensions W×D×H | Connection | Sound range | Weight |
|---|---|---|---|---|---|---|
| CSD 90 | 60 hp | 100→337 / 110→325 / 125→300 / 150→271 / 175→255 acfm | 71 × 43 × 75 in | 2 NPT | 67–69 dB(A) | 2,954 lb |
| CSD 110 | 75 hp | 100→404 / 110→392 / 125→376 / 150→332 / 175→305 / 217→261 acfm | 71 × 43 × 75 in | 2 NPT | 69–70 dB(A) | 3,109 lb |
| CSD 130 | 100 hp | 100→518 / 110→498 / 125→459 / 150→425 / 175→367 / 217→307 acfm | 71 × 43 × 75 in | 2 NPT | 70–74 dB(A) | 3,307–3,527 lb by pressure/airend |
| CSD 145 | 100 hp | 100→584 / 110→562 / 125→542 / 150→472 / 175→445 acfm | 83 × 50 × 77 in | Complete at quotation | 72–73 dB(A) | 3,946–4,167 lb by pressure/airend |
| CSD 175 | 125 hp | 100→689 / 110→664 / 125→593 / 150→567 / 175→508 / 217→447 acfm | 83 × 50 × 77 in | Complete at quotation | 73–76 dB(A) | 4,255–4,475 lb by pressure/airend |
Configuration note: CSD 90 and CSD 145 do not include a 217 psi row in the supplied model data. Performance ratings use the CAGI/ISO 1217 basis. Electrical configurations include 460 or 575 V, 3-phase, 60 Hz, with other voltages available; final electrical configuration remains proposal-specific.
T versions / add-on refrigerated dryer
Integrated drying is available without pretending every CSD is a T model.
Standard CSD and T versions remain separate configurations. Compressor flow stays tied to the same model/pressure point while the add-on dryer changes package width, weight and treatment architecture.
ABT 105
CSD 90 T / CSD 110 T
Both use the ABT 105 add-on refrigerated dryer. T-package dimensions are 87 × 43 × 75 in.
ABT 125
CSD 130 T
CSD 130 T uses ABT 125 with a T-package size of 87 × 43 × 75 in.
ABT 165
CSD 145 T / CSD 175 T
Both use ABT 165 with a T-package size of 99 × 50 × 77 in.
Dryer performance
37 °F pressure dew point
ABT 105, 125 and 165 are each rated at a 37 °F pressure dew point.
Refrigerant
R-513A refrigerant
CSD T dryer sizes use R-513A refrigerant.
Dryer control
Energy-saving dryer control
The add-on dryer operates when compressed air requires drying rather than simply running continuously, with ECO-DRAIN condensate drainage.
Efficiency and thermal strategy
Pressure, cooling, ETM and heat recovery all belong in the same energy conversation.
CSD combines pressure-specific optimization, IE4 fixed-speed motors, ETM and demand-based cooling. Heat recovery can turn a portion of compressor waste heat into a useful plant resource when the application has a real heat sink.
Drive efficiency
IE4 fixed-speed drive
Fixed-speed CSD systems use asynchronous motors meeting IE4 efficiency class.
Pressure
Pressure-specific optimization
Six pressure variants exist across the CSD family so the compressor can be matched more precisely instead of oversupplying pressure.
Cooling energy
Demand-based fan speed
The CSD cooling fan is speed controlled so cooling airflow can be reduced when operating conditions do not require maximum fan output.
Thermal management
ETM condensate prevention
Electronic Thermal Management controls fluid temperature to help avoid internal condensate formation and its effects on lubricant and compressor life.
Heat recovery
Heat recovery option
Optional integrated heat recovery uses a plate-type heat exchanger, with exhaust-air heat recovery also available. Useful recovery depends on site heat demand.
SIGMA CONTROL 2
Controller, protection and plant communication are part of the compressor package.
SIGMA CONTROL 2 is the integrated CSD controller, supporting maintenance tracking, operating-parameter monitoring, web access and industrial communications options.
Machine control
Operating control
SIGMA CONTROL 2 coordinates compressed-air generation and evaluates relevant operating states.
Protection
Condition monitoring
The controller monitors more than 20 critical parameters and tracks preventive-maintenance intervals.
Connectivity
Ethernet and web access
SIGMA CONTROL 2 provides Ethernet connectivity and a built-in web server for remote visibility.
Plant integration
Industrial interfaces
EtherNet/IP, Modbus, Profinet, Profibus, DeviceNet and other interfaces are available as plug-in options.
Air quality and condensate control
Compression quality, moisture separation and downstream treatment are separate layers.
The CSD base package includes moisture separation and fluid-separation features, but a plant purity target still depends on dryer, filtration and adsorber choices downstream.
Fluid separation
Three-stage fluid separation
The three-stage fluid-separation system is rated at 1–3 ppm fluid carry-over. This is a compressor separation figure, not a complete ISO 8573-1 oil-class specification.
Moisture
Integral moisture separator
KAESER places a moisture separator in the discharge path and pairs it with a zero-loss ECO-DRAIN to remove separated condensate.
Dryer
Optional refrigerated drying
Choose the T version where a 37 °F PDP refrigerated-dryer result fits the application. Lower dew points require another drying strategy.
Particles
Particle control
Select downstream filters from the actual particle limit, flow and pressure rather than assuming compressor inlet filtration defines delivered-air purity.
Oil control
Oil aerosol / vapour
Sensitive processes may need coalescing and/or adsorption treatment beyond the compressor’s internal fluid-separation system.
Qualification
Formal purity targets
If ISO 8573-1 classes matter, define particle, water and oil classes for the complete treatment train and acceptance conditions.
Ownership playbook
Service access is engineered into the enclosure—do not design it out of the room.
The CSD service layout uses large swing-out/removable doors, accessible filters, externally positioned coolers and controller maintenance reminders.
Access
Keep doors removable
Front and rear package doors are designed to swing out and can be removed. Maintain real access in the final compressor-room layout.
Cooling
Keep coolers inspectable
Externally positioned coolers make fouling easier to inspect and clean without unnecessary disassembly.
Maintenance
Use PM monitoring
SIGMA CONTROL 2 tracks preventive-maintenance intervals and stores operating alerts/conditions to support service planning.
Installation
Protect the air path
Maintain clean inlet air, cooling airflow and condensate discharge paths; final clearances and ventilation come from the installation documentation.
System integration sequence
Measure. Model. Select. Engineer. Sustain.
A CSD purchase should close the entire system question: demand, pressure, redundancy, storage, treatment, controls, cooling, heat recovery and distribution.
Measure
Capture average, peak and minimum demand plus production schedules and future expansion.
Model
Determine point-of-use pressure, pressure losses, storage, treatment and compressor-control strategy.
Select
Choose the CSD model and exact pressure variant from the pressure/flow table.
Engineer
Close electrical service, cooling/ventilation, piping, dryer/filters, heat recovery, redundancy and master controls.
Sustain
Use controller data, maintenance history and periodic demand review to keep the station matched to production.
Deployment configurations
Base CSD, T dryer package, water cooling, heat recovery or multi-compressor plant.
The CSD family is a platform. The correct configuration depends on air demand, room conditions, process air quality and whether the compressor is working alone or as part of a larger managed station.
Base model
Base fixed-speed CSD
Use the standard compressor where drying and storage are handled separately and the measured baseload supports fixed-speed duty.
Dryer variant
CSD T
Add the integrated refrigerated-dryer cabinet when a 37 °F PDP solution fits the process and compact integrated drying has value.
Cooling option
Water-cooled CSD
CSD compressors are available water-cooled with stainless-steel plate-type heat exchangers, with shell-and-tube available on request.
Energy reuse
Heat-recovery configuration
Optional heat recovery can supply useful hot water or recover exhaust-air heat when the plant has a practical thermal load.
Plant architecture
Multi-compressor station
Coordinate several compressors with storage and master control instead of allowing independent pressure bands to fight one another.
Business-case framework
At 60–125 hp, lifecycle decisions dominate the equipment-price difference.
Build the economic comparison around measured demand, pressure, loaded/unloaded operation, cooling, treatment, maintenance, downtime, heat recovery and system control—not a generic “percentage savings” claim.
Energy
Energy at actual demand
Use measured operating hours, selected pressure and real compressor loading to model annual energy.
Pressure
Pressure cost
Quantify avoidable pressure and distribution loss because every unnecessary psi is carried across a large volume of air.
Heat recovery
Heat recovery value
Value recovered heat only when the site has a useful thermal load, a realistic operating schedule and appropriate integration scope.
Uptime
Downtime exposure
Include production risk, redundancy, service access, parts strategy and the cost of losing compressed air.
Application data package
The right CSD starts with plant data—not the old compressor nameplate.
For a compressor in this power class, a demand study and clean system inventory can prevent oversizing, undersizing and unnecessary pressure from being carried into the next equipment generation.
Air demand
Demand profile
Average, peak and minimum flow; shifts; weekends; major users; expansion; known leaks.
Pressure
Pressure requirement
Lowest acceptable point-of-use pressure, existing setpoints, measured drop and pressure-sensitive equipment.
Quality
Air quality
Required pressure dew point, particle/oil limits, existing dryer/filter train and formal purity targets.
Site
Site and utilities
Electrical service, cooling method, room dimensions, ventilation, piping, receivers, heat sink, condensate route and service access.
CSD Series FAQ
Questions that determine the correct CSD route.
Model-specific pressure/flow data drives CSD selection; the final proposal closes utilities, treatment, cooling, storage and controls.
Which fixed-speed CSD models are in this family?
CSD 90, CSD 110, CSD 130, CSD 145 and CSD 175.
What is the capacity range?
The listed model/pressure points span 255 to 689 acfm.
What pressure variants are available?
The family uses 100, 110, 125, 150, 175 and 217 psi pressure points across the range, but not every model is available at every pressure.
Which motors are used?
Fixed-speed CSD systems use IE4 asynchronous motors. Nominal ratings are 60, 75, 100, 100 and 125 hp for CSD 90 through CSD 175.
Are integrated dryers available?
Yes. T versions pair CSD 90/110 with ABT 105, CSD 130 with ABT 125, and CSD 145/175 with ABT 165.
What pressure dew point do the T dryers provide?
The T dryer configurations are rated at a 37 °F pressure dew point.
Is heat recovery available?
Yes. KAESER publishes optional CSD heat-recovery configurations. The useful amount depends on compressor loading, heat-recovery design and the customer’s real heat demand.
How does SIGMA CONTROL 2 fit the system?
It controls and monitors the compressor, supports condition/maintenance visibility and can communicate with broader plant-control or master-control architecture.
CSD Series application review
Bring the plant demand profile—not just the horsepower target.
Titan can qualify the CSD family around measured or estimated air consumption, true point-of-use pressure, operating schedule, treatment requirement, cooling strategy, electrical service, redundancy and future expansion.
Useful inputs: existing compressors, loaded/unloaded hours, cfm/acfm demand, required pressure, production schedule, receivers, dryers/filters, major air users, piping size, electrical service, compressor-room conditions, cooling water if available, heat-recovery opportunity and redundancy needs.