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HPC Kaeser Airtower 11 Rotary Air Compressor & Dryer

Stock No
Airtower 11
Year of Manufacture
New or Used
Used (Second Hand)
40cfm @ 7.5bar to 28cfm @ 13bar / 7.5kW
Compressor Type
Rotary screw
Other Info
Hours run - 29,960
Our Central Warehouse, Aldridge, UK
Weight (kgs)
External Dimensions (WxDxH mm)
680 x 775 x 1285 mm


The KAESER AIRTOWER 11 incorporate a powerful rotary screw compressor mounted directly above a high efficiency refrigeration airdryer, consequently eliminating the need for additional floor space. 

KAESER AIRTOWER systems fulfill all of your compressed air needs: they are efficient, quieter than quiet, require minimal maintenance, are extremely reliable, simple to install and deliver the very best in air quality

The KAESER AIRTOWER 11 is a complete package, features include:

- Fully automatic: rotary screw compressor,
- Centrifugal separator with electronic condensate drain,
- Refrigerated dryer unit,
- Sound insulation: plastic foam with washable surface.
- Anti-vibration: dual anti-vibration mountings using rubber bonded metal elements.

Compressor unit:

KAESER rotary screw, single-stage airend with cooling fluid injection, V-belt drive with automatic tensioning,
energy-efficient quality German electric motor to IP 54 and insulation class F with permanently greased bearings.

Fluid and air flow: changeable filter mats in the cabinet inlet, dry air filter with silencer, pneumatic inlet and venting valve, coolingn fluid reservoir tank with triple separation system, pressure relief valve, minimum pressure/check valve, thermostatic valve and microfilter,

Cooling: air-cooled, combined fluid and compressed air cooler (aluminium).

Controller: ergonomic control panel, traffic-light style LEDs (green, yellow, red) show the operational status of the compressor, user friendly operation via clearly marked icon keys and large display, fully automatic dual control (on-load-/off-load-/cycling control), monitoring of system pressure, airend discharge temperature,
direction of airend rotation, hours counter (on-load/off-load), adjustable service interval, selection of measurement units (pressure: bar, psi, MPa; temperature: °C, °F), individually adjustable system pressure, ‘group alarm’ volt-free contact, adjustable switching differential, electronic pressure transducer.

Refrigeration dryer: CFC free, R 134a refrigerant, service module, thermally insulated, permanently sealed refrigerant circuit, hot-gas bypass regulation, electronic condensate drain.

Electrical components: control cabinet to IP 54 containing star-delta starter, motor overload protection, control
transformer, IP 54 control cabinet for the refrigeration dryer.

Intelligent design

Unlike packaged systems that are crammed into one cabinet, a major design feature of the KAESER
AIRTOWER range is that the compressor and dryer are both completely separate, independently functioning

This means that each can be operated individually making it possible to isolate and service the dryer whilst the compressor is operating.

Contained in its own separate cabinet there is sufficient space to allow the dryer components to be generously sized yet easily accessible.


The SIGMA CONTROL automatically controls and monitors the compressor package. It is a robust PC-based
industrial computer with real-time operating system and update capability. A plain text display and traffic-light style LEDs clearly show the operational state of the machine at a glance. A choice of four control modes is available to allow selection of the most appropriate for a specific application.

The refrigeration dryer is equipped with an independent control panel and on/off/emergency stop switch.

Dry Air as Standard
The Airtower produces dry air with a pressure dew point of +3 °C reliably and cost-effectively.

pdf icon Print / Download HPC Kaeser Airtower 11 Rotary Air Compressor & Dryer Datasheet

Photographs taken prior refurbishment. Our refurbishment service is not available on all machines.