Instruction book
2920 1521 00 5
1 LEADING PARTICULARS
1.1 General description
SF1 up to SF15 are stationary, oil-free compressors driven by an electric motor.
1.1.1 Compressor variants
SF Skid (Fig. 1.2)
The components of the compressor are housed in a bodywork with removable front/top panel. The
compressor is mounted on a frame designed to allow easy installation at the required spot.
SF Tank-mounted (Fig. 1.3)
The components of the compressor are housed in a bodywork with removable front/top panel. The
compressor is mounted on an air receiver.
SF Twin (Fig. 1.4)
Two compressor modules are mounted on an air receiver. Each module is provided with its own control
panel.
SF Multi Pack
The compressors have two up to four compressor modules enclosed in a sound-insulated bodywork.
The front door comprises an Elektronikon regulator including the start and stop buttons. An
emergency stop button is also provided. An electric cabinet comprising the motor starter is installed
behind the front door.
SF Multi Full-Feature (Figs. 1.5 and 1.6)
Full-Feature compressors are Pack compressors additionally provided with an air dryer integrated in
the bodywork. The dryer removes moisture from compressed air by cooling the air to near freezing
point and automatically draining the condensate. See section 1.7.
1.1.2 Compressor elements (Fig. 1.1)
Each compressor element consists of a fixed scroll-shaped housing and a scroll-shaped rotor. Air
enters the compressor element through inlet opening (1). Once the air is drawn in, the orbiting scroll
(4) seals the inlet opening and forces the air into a continuously decreasing space. As scroll (4) keeps
orbiting, this process of compression is constantly repeated, resulting in discharging of oil-free
compressed air through outlet opening (3).
1 Air inlet
2 Fixed scroll
3 Compressed air outlet
4 Orbiting scroll
Fig. 1.1 Compressor element
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