At the heart of each HPC ASK 'T' series rotary screw air compressor complete with integrated refrigeration dryer is the specially designed airend with flow-optimised Sigma Profile rotors delivering more compressed air for less energy consumption. The efficiency of the airend is further complimented by a highly effective cooling system with dual-flow fan. This innovative design not only enhances cooling performance, but also minimises sound emissions. Furthermore, separate intake of motor-cooling air and air for compression from the ambient surroundings ensures optimum motor cooling and increased compression performance.

The internal “Sigma Control Basic” controller provides automatic system monitoring and precisely adjusts compressor performance to match actual compressed air demand. Models are also optionally available equipped with the “Sigma Control 2”, which allows connection to compressed air management systems.

These units are also exceptionally service-friendly: The housing cover on the left of each unit is easy to remove and allows excellent component accessibility, whilst the new maintenance-free drive belt between the motor and airend eliminates the need for intermittent belt tensioning and adjustment. This both guarantees optimum power transmission and reduces service costs.

Complete unit 

Sound insulation

• Panels lined with laminated mineral wool

Vibration dampening 

• Anti-vibration mounts
• Dual anti-vibration mount
• Anti-vibration mounts
• Dual anti-vibration mount

Airend 

• Single stage with cooling fluid injection for optimal rotor cooling
• Genuine Kaeser rotary screw airend with the SIGMA Profile

• V-belt drive with automatic belt tensioning

Electric Motor

• IE3 premium efficiency motor
• Premium quality German-made motor
• Insulation class F for greater power reserve

Electrical components 

• Control cabinet to IP 54
• Control transformer
• Siemens frequency converter
• Volt-free contacts for ventilation control

Fluid and air flow 

• Dry air filter
• Pneumatic inlet and venting valves
• Cooling fluid reservoir with three-stage separator system
• Pressure relief valve
• Minimum pressure/check valve
• Thermostatic valve and micro-filter in coolant circuit
• All fully piped
• Flexible couplings

Cooling 

• Air-cooled
• Separate aluminium coolers for compressed air and fluid
• Radial fan meets the high requirements on fan efficiency demanded by the EU Directive 327/2011

Heat recovery (HR) 

• Optionally available with integrated heat recovery system (plate-type heat exchanger)

SIGMA CONTROL 2 

• "Traffic-light" LED indicators show operational status at a glance
• Plain text display
• 30 selectable languages
• Soft-touch keys with icons
• Fully automated monitoring and control
• Selection of Dual, Quadro, Vario and Continuous control as standard
• Interfaces: Ethernet
• Additional optional communications modules for: Profibus DP, Modbus, Profinet and DeviceNet
• SD-card slot for data-logging and updates
• RFID reader
• Web server