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	Rotary screw compressors
		Standard design
		with refrigeration dryer
		with variable speed drive
	Reciprocating compressors
	Dental compressors
	Air treatment
	Controllers
	Rotary screw vacuum pumps
	Rotary blowers
	Portable compressors
	Tools
	Genuine parts
	SIGMA PET AIR
	Contracting

Rotary screw compressors with Sigma Frequency Control

Technical specification

Series: SM SFC to FSD SFC
Motor power: 7.5 to 315 kW
Delivery: 0.43 to 40.5 m³/min
Standard pressure: 6 to 15 bar_(g)

SM SFC to FSD SFC series compressors from Kaeser are exceptionally efficient variable-speed rotary screw compressors. SM, SK and ASK SFC models use Kaeser’s minimal maintenance V-belt drive system, which features automatic belt tensioning to ensure optimum power transmission. Larger models from the ASD SFC upwards are equipped with the speed-controlled 1:1 direct drive.
The large, slow-speed KAESER airends with energy-saving SIGMA PROFILE rotors provide outstanding performance across the entire control range.
Every Kaeser SFC compressor model is capable of 100 percent duty cycles without any increase in maintenance requirement.

SIGMA CONTROL
This internal compressor controller is a robust PC-based industrial computer with a real-time operating system and update capability. System operational status can be displayed in any one of 30 selectable languages, whilst ‘traffic light’ style LEDs indicate status at a glance.

Precise pressure control
SFC compressors are able to control air flow to match actual demand by continuously adjusting the airend speed within the given control range. Pressure can be maintained to within ± 0.1 bar, consequently enabling the maximum system pressure to be reduced. This can lead to significant savings, as each 1 bar pressure decrease results in a six percent reduction in energy consumption.

Built for higher ambient temperatures
A generously sized SFC module and efficient cooling of its separate frequency control cabinet allow the use of KAESER SFC compressors in ambient temperatures up to 45 °C.

Complete package EMC certified
The electro-magnetic compatibility (EMC) of components and of the complete machine has been tested and certified in accordance with all applicable regulations.

Soft start with no current spikes
The soft rise in motor starting current from zero to full load without current spikes leads to an almost unlimited motor starting frequency (the number of possible motor starts within a given time period without overheating occurring). The continuously variable acceleration and deceleration significantly reduces component stress.


	More Information

	Outstanding performance with SFC
	Lower life-cycle costs
	Premium quality, precision machined
	SIGMA CONTROL
	SIGMA PROFILE - more air for less power
	Brochures:
	SM 5.5–9 kW
	SK 11–15 kW
	ASK 15–22 kW
	ASD T SFC 18.5–30 kW
	BSD/CSD/CSDX T SFC 30–90 kW
	DSD SFC 110–160 kW
	ESD SFC 200–250 kW
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