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The cut-out pressure should be in accordance with the pressure setting of the piece number being used. (Common cut-out pressures are between 105-125 psi.) With the engine still running, make a series of brake applications to reduce the air pressure and observe at what pressure the governor cuts-in the compressor.
The Static Pressure Regulating Dampers are barometric relief. dampers used to by-pass excess air pressure on zoned systems. The. dampers automatically respond to the air pressure in duct as the. various zone dampers open and close. As zone dampers close off air to a number of zones, the supply air. pressure in the duct system will increase. This increase in air pressure.