The Viking Model F-1 Maintenance Air Compressor is an electric motor-driven, air-cooled, single-stage, oil-less compressor. The unit is equipped with a check valve and provides a regulated (by pressure switch setting) and restricted (60 Cycle - 2.1 SCFM at 0 psi gauge to 1.5 SCFM at 50 psi gauge) or (50 Cycle - 1.6 SCFM at 0 psi gauge to 1.2 at 50 psi gauge) air supply. A pressure relief valve is factory installed to prevent pressurizing system piping above 65 psi (4.5 bar). The Model F-1 is for use when system pressures are required to be over 15 psi.