Johnson Controls - C-130-1

CONTROLLER: C-130 COMPARATOR IS A PRESSURE ACTUATED DEVICE THAT RECEIVES PRESSURE INPUT FROM TWO DIFFERENT SOURCES, COMPARES PRESSURE, AND SENDS A CONTROLLING SIGNAL TO PILOT A PNEUMATIC CONTROLLER OR OPERATE A CONTROLLED DEVICE. WHEN BOTH SIGNAL INPUT PRESSURES ARE EQUAL, COMPARATOR MAINTAINS AN OUTPUT PRESSURE EQUAL TO 9 PSI, FORCE OF BIASING SPRING IN CONTROLLER. WHEN INPUT PRESSURE INCREASES AT CONNECTION 1, DEVICE INCREASES OUTPUT PRESSURE. WHEN INPUT PRESSURE INCREASES IN CONNECTION 2, DEVICE DECREASES OUTPUT PRESSURE. IN EFFECT, COMPARATOR REACTS TO TWO SIGNAL INPUT PRESSURES TO DETERMINE ITS OUTPUT OR CONTROL PRESSURE.