3-Phase pressure switch, pressure control 3-phase, air compressor switch, air compressor switch, air pump switches The FB-18(3-Phase) pressure switch is specifically designed ... to stand up to extended duty applications. This switch is factory set ... : 1Mpa =10bar,1bar = 14.5PSI,1Kgf/cm2 = 14.2PSI 3-phase pressure switch for air compressor