Pressure
Pressure still starts at the process
Choose the 125, 160 or 217 psi version from actual point-of-use requirements and downstream losses—not from a habitually high compressor setpoint.
Kaeser AS
AS SERIES T · 20T / 25T / 30T
A 20–30 hp KAESER rotary screw compressor platform with an integrated ABT 40 refrigerated dryer. The T configuration packages compression and drying together while receiver storage remains an independent system-design decision.
20–30 hp67–141 acfm by pressure/model125 / 160 / 217 psiABT 40 dryer37 °F PDPSIGMA CONTROL 2
Demand / problem
Plants in the 20–30 hp class often need dry air but do not necessarily want compressor, dryer and receiver sizing locked into one combined tank package.
Engineering mechanism
AS single-stage fluid-injected screw compression, V-belt drive, SIGMA PROFILE and the integrated ABT 40 refrigerated dryer are packaged together and managed by SIGMA CONTROL 2.
Ownership value
Integrated drying reduces interconnection work while the separate receiver decision lets storage, peak demand and redundancy be engineered around the actual plant rather than fixed by the compressor cabinet.
20–30 hp AS platform
Integrated ABT 40 dryer
67–141 acfm matrix
SIGMA CONTROL 2
Service-friendly layout
Heat recovery available
The actual system problem
Dry air is only one part of getting a 20–30 hp system right.
The AS T combines compression and refrigerated drying, but pressure, demand variation, receiver storage, filtration and distribution remain system-level decisions. That separation is useful when the plant needs integrated drying without forcing every other compressed-air component into the same cabinet.
Air quality
The dryer solves moisture, not every contaminant
The integrated ABT 40 addresses pressure dew point. Particle and oil requirements still need the correct filtration train and acceptance target.
Storage
Receiver storage remains a separate choice
Receiver storage is selected independently around peak duration, cycling, system volume and redundancy.
Control strategy
Demand variability can change the answer
AS 20T/25T/30T are fixed-speed T models, so the measured load profile should support fixed-speed duty before the package is selected.
Application fit
For 20–30 hp plant-air demand that needs integrated refrigerated drying.
The AS T family is strongest where air demand is substantial but reasonably compatible with fixed-speed operation, moisture control is required, and receiver/storage design should remain independent.
Strong fit
Industrial production air
The AS 20T, 25T and 30T fit general plant-air duties where 67–141 acfm covers the required pressure-specific capacity range.
Strong fit
Dry-air machine support
Integrated refrigerated drying reduces moisture before distribution to CNCs, controls, pneumatic equipment and other indoor plant users.
Strong fit
Separate receiver strategy
A strong choice where the customer wants the dryer integrated but needs receiver volume selected independently for the real demand pattern.
Load profile
Confirm fixed-speed duty
Apply AS Series T where the measured demand profile supports fixed-speed operation and size storage and controls around that duty.
Qualify treatment
Low-dew-point applications
A 37 °F refrigerated-dryer PDP is not a desiccant-dryer result. Cold outdoor piping or very dry process air may require a different treatment route.
System-level decision
Critical production uptime
If one compressor outage stops the plant, engineer redundancy, storage and controls deliberately. The T configuration does not itself create backup capacity.
Select from demand backwards
AS 20T, 25T or 30T is a pressure-and-flow decision.
Model selection starts with usable air demand at the required pressure, then accounts for pressure loss, air quality, operating profile, storage and future growth.
Measure demand
Establish average, peak and minimum air use, shift pattern and future expansion.
Set point-of-use pressure
Start at the lowest acceptable production pressure, then account for treatment and piping losses.
Define moisture and purity
Confirm whether 37 °F PDP is enough and whether particles or oil require additional treatment.
Size storage separately
Choose receiver volume from peak demand, allowable pressure swing, cycling and system volume rather than assuming one tank size.
Select fixed or variable speed
Use the AS T family where the measured demand profile supports fixed-speed duty.
Product architecture
AS compression with refrigerated drying integrated beside it.
The AS T platform combines a single-stage fluid-injected airend, V-belt drive with automatic tensioning, separate coolers, radial fan, integrated refrigerated drying, optional heat recovery and SIGMA CONTROL 2.
Compression
AS screw compressor
Single-stage fluid-injected compression uses a genuine KAESER airend with SIGMA PROFILE rotors.
Drive
V-belt drive
The AS uses a V-belt drive with automatic belt tensioning to maintain transmission performance over service life.
Drying
Integrated ABT 40 dryer
AS 20T, 25T and 30T use the ABT 40 refrigerated dryer.
Control
SIGMA CONTROL 2
SIGMA CONTROL 2 provides automatic monitoring/control, Ethernet, data logging, web-server access and optional communications modules.
Technical data
AS Series T model matrix.
Pressure-specific flow, motor, dryer, dimensions, connection, sound and weight are kept model-specific for AS 20 T, AS 25 T and AS 30 T.
| Model | Working pressure | Complete-system flow | Motor | Dryer | Dimensions W×D×H | Connection | Sound | Weight |
|---|---|---|---|---|---|---|---|---|
| AS 20 T | 125 / 160 / 217 psi | 97 / 83 / 67 acfm | 20 hp | ABT 40 | 32 × 58 × 60 in | 1¼ NPT | 67 dB(A) | 1,279 lb |
| AS 25 T | 125 / 160 / 217 psi | 120 / 102 / 85 acfm | 25 hp | ABT 40 | 32 × 58 × 60 in | 1¼ NPT | 69 dB(A) | 1,323 lb |
| AS 30 T | 125 / 160 / 217 psi | 141 / 122 / 102 acfm | 30 hp | ABT 40 | 32 × 58 × 60 in | 1¼ NPT | 71 dB(A) | 1,367 lb |
ABT 40 dryer data: 37 °F pressure dew point, R-513A refrigerant, electronically controlled condensate drainage, cycling shutdown, hot-gas bypass control and a fully insulated refrigerant section. Receiver sizing, electrical configuration and downstream treatment remain part of the complete system design.
Efficiency strategy
Match pressure, demand and treatment before chasing headline efficiency.
The AS platform combines SIGMA PROFILE compression, automatic belt tensioning, efficient cooling and dryer cycling. The site result still depends on correct pressure selection, demand matching and low distribution loss.
Compression efficiency
SIGMA PROFILE airend
SIGMA PROFILE is the AS airend geometry used for the compression stage. Facility energy performance still depends on pressure, demand and total system conditions.
Power transmission
Automatic belt tensioning
The V-belt system is designed to maintain consistent transmission and reduce maintenance attention over the belt service interval.
Cooling
Radial fan cooling
Separate aluminum coolers and the radial-fan arrangement support compressor thermal management and allow top exhaust for practical heat handling.
Treatment energy
Dryer cycling
The integrated refrigerated dryer uses cycling shutdown instead of assuming continuous operation whenever the compressor is inactive.
Heat recovery
Optional heat recovery
Integrated heat recovery with a plate-type heat exchanger is available as an AS option. Useful recovered heat depends on the site’s actual heat demand and configuration.
Demand matching
Fixed vs variable speed
AS T is a fixed-speed route and should be applied where the measured demand profile supports fixed-speed operation.
SIGMA CONTROL 2
Local machine intelligence with industrial communications options.
SIGMA CONTROL 2 provides automatic monitoring/control, selectable operating modes, Ethernet connectivity, data logging, RFID access and browser-based visibility.
Interface
Operating status
Traffic-light LEDs and the display support at-a-glance operating status and machine information.
Operating logic
Control modes
Dual, Quadro, Vario and Continuous modes are available operating choices.
Data
Data logging
The SD-card slot supports data logging and updates while the integrated web server provides networked browser access.
Connectivity
Plant communications
Ethernet is standard; optional Profibus DP, Modbus, Profinet and DeviceNet modules support plant integration.
Air quality and moisture control
The ABT 40 is the moisture-control layer—not the entire air-treatment specification.
The integrated dryer is rated at a 37 °F pressure dew point. Final particle, oil aerosol, oil vapour and lower-dew-point requirements must be built around the process.
Water
Moisture
Use 37 °F PDP as the refrigerated-dryer reference and compare it with the coldest downstream environment and process requirement.
Particles
Particles
Filtration is selected separately from the dryer. Do not assign a particle class without the actual filter train.
Oil control
Oil aerosol / vapour
The AS is fluid-injected. Sensitive processes need a defined treatment train and acceptance standard rather than a generic clean-air claim.
Drainage
Condensate
Electronic condensate drainage handles dryer condensate discharge, while site collection and treatment remain installation responsibilities.
Dew point
Low-dew-point duty
Outdoor winter piping or very dry processes can require desiccant or another drying strategy beyond the AS T refrigerated dryer.
Qualification
Process acceptance
For coating, food, instrumentation or other sensitive applications, define the required ISO 8573-1 result from the process backwards.
Ownership playbook
Service access is a design feature—preserve it in the room layout.
Open component layout, accessible service points, external cooler access, automatic belt tensioning and controller-based maintenance visibility support routine ownership.
Access
Keep service doors usable
Do not trade the package footprint for a room layout that blocks removable doors or routine service points.
Cooling
Keep the cooler side clean
External cooler access and filter-mat inspection only help if intake/exhaust paths remain clean and unobstructed.
Condensate
Route condensate properly
Dryer condensate must enter an approved collection and treatment route rather than an improvised floor-drain path.
Monitoring
Use controller maintenance data
SIGMA CONTROL 2 status and service information should be incorporated into normal ownership planning, not checked only after a shutdown.
System integration sequence
Measure. Select. Engineer. Commission. Sustain.
The integrated dryer simplifies one part of the system; it does not eliminate the need to design pressure, storage, filtration, ventilation and controls as a whole.
Measure
Document average, peak and minimum air demand, pressure-sensitive users and production growth.
Select
Choose AS 20T, 25T or 30T and pressure version from the required complete-system acfm.
Engineer
Size receiver storage, filtration, piping, electrical service, ventilation, condensate and redundancy separately.
Commission
Verify pressure at representative users, dryer operation, cycling, alarms and downstream pressure loss.
Sustain
Track demand growth, pressure, maintenance and air quality so the selected AS T remains correctly matched.
Deployment configurations
Integrated dryer, flexible system architecture.
Because the T version integrates drying but not a receiver package, storage and plant architecture can be engineered around the application rather than a fixed tank size.
Primary station
Primary plant compressor
Use AS T as the main fixed-speed compressor where the demand profile and required pressure fit the selected model.
Decentralized
Dedicated production area
A T model can serve a department or building that needs its own dry-air source and independent storage strategy.
Storage
Custom receiver pairing
Pair the T compressor with a receiver sized for actual demand peaks, control band and system volume rather than a preselected package tank.
Redundancy
Duty / standby pair
Two properly integrated units can support redundancy when the control, isolation and receiver strategy are designed deliberately.
Treatment
Additional filtration
Add filters or adsorbers according to the actual contaminant limit and air-quality requirement.
Load profile
Confirm fixed-speed duty
Apply AS Series T where the measured demand profile supports fixed-speed operation and size storage and controls around that duty.
Business-case framework
Compare the complete installed air system—not just the compressor cabinet.
Integrated drying can simplify installation, but the real economics still include energy, pressure, storage, filtration, ventilation, service, downtime exposure and distribution losses.
Capital
Installed scope
Compare compressor-plus-integrated-dryer against the real installed cost of a separate dryer, piping, controls and condensate connections.
Energy
Operating energy
Use real operating hours and load profile; do not assign a generic annual savings percentage.
Pressure
Pressure cost
Evaluate unnecessary system pressure and downstream loss using the site’s actual demand.
Risk
Downtime exposure
If compressed-air loss stops production, include receiver autonomy, redundancy and service response in the business case.
Application data package
Bring the demand profile, pressure requirement and dryer conditions.
AS T selection is strongest when the system is understood. Where plant demand is uncertain, measured demand is more useful than simply replacing the old horsepower size.
Air demand
Demand profile
Average, peak and minimum flow; operating hours; major air users; future expansion.
Pressure
Pressure requirement
Point-of-use pressure, existing setpoint, known pressure drop and the most pressure-sensitive equipment.
Quality
Air quality
Required PDP, particle/oil sensitivity, existing filtration and any formal ISO 8573-1 target.
Site
Site utilities
Electrical service, room dimensions, ambient, ventilation, condensate route, receiver strategy, piping and service access.
AS Series T FAQ
Questions that determine whether AS 20T, 25T or 30T is the right route.
Pressure-specific model data is shown below; site utilities, storage, filtration and controls are closed for the selected installation.
Which AS T models are covered?
AS 20 T, AS 25 T and AS 30 T.
What dryer is integrated?
AS 20 T, AS 25 T and AS 30 T use the ABT 40 refrigerated dryer.
What pressure dew point is?
The ABT 40 is rated at a 37 °F pressure dew point.
How much air do the T models deliver?
Pressure-specific complete-system flow ranges from 67 to 141 acfm across AS 20 T, AS 25 T and AS 30 T.
Is an air receiver included?
Receiver/storage is selected separately from the AS T compressor-and-dryer package.
Does the dryer define the complete ISO air-quality class?
No. It addresses moisture. Particle and oil classes depend on the full treatment train and operating conditions.
Is SIGMA CONTROL 2 part of the AS Series?
SIGMA CONTROL 2 provides automatic monitoring/control and Ethernet connectivity.
Can heat recovery be added?
An integrated plate-type heat-recovery system is available as an AS option. Useful recovery depends on the selected configuration and actual heat demand.
Does AS Series T use V-belt drive?
Yes. The AS platform uses V-belt drive with automatic belt tensioning.
What remains quotation-specific?
Electrical configuration, package input power, receiver size, filtration, ventilation, heat recovery, networking, service clearances and commissioning conditions are finalized for the selected site.
AS Series T application review
Bring the demand profile—not just the 20, 25 or 30 hp target.
Titan can qualify the AS T family around measured or estimated air consumption, point-of-use pressure, shift profile, ABT 40 dryer requirement, receiver/storage strategy, electrical service, air quality, room conditions and production growth.
Useful inputs: compressor model, cfm/acfm demand, required pressure, shift hours, major pneumatic equipment, target dew point, filtration requirement, existing receiver, piping, electrical service, room dimensions, ambient, ventilation and redundancy needs.