2 General description
2.1 Introduction
General
SF 1, SF 2, SF 4 and SF 6 are stationary, single stage, oil-free compressors, driven by an electric motor.
The compressors are controlled by a pressure switch.
The compressors are enclosed in a sound dampening enclosure and are air cooled.
Available versions:
• The Pack version (P) comprises the motor, the compressor element, the air cooled aftercooler and the
regulation and protection components.
• The Full Feature (FF) version is a Pack version, completed with an integrated refrigerant dryer.
The basic version (referred to as the floor mounted version (FM)) does not include an air receiver.
Available options:
• Air receiver of 30 l (7.93 US gal), 270 l (71.3 US gal) or 500 l (132 US gal). The 30 l receiver
consists of a module with three 10 l (2.64 US gal) receivers. The 30 l receiver option includes an
electronic drain.
• Electronic drain on the air receiver on the receiver mounted version (270 l and 500 l).
• Water separator on the outlet on floor mounted compressors without refrigerant dryer.
• Prefilter mats on the air inlet
• Phase sequence relay on 3–phase units.
SF Pack
The control panel comprises a pressure gauge, an hour meter and a start button. The compressor is
controlled by a pressure switch (PS).
The electric components are located in the cubicle behind the front panel door.
A check valve (CV) prevents loss of compressed air when the compressor is stopped.
A temperature switch and a safety valve (SV) protect the compressor element against overheating and too
high pressure respectively.
The compressed air is cooled by an air cooler (Ca).
Single phase units are equipped with a vent valve for easy starting.
Instruction book
2920 7110 11 9
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