BARBER COLMAN

FLUID FLOW REGULATING VALVES

ELECTRIC SWITCHES OPERATED PROGRAMMATICALLY, SEQUENTIALLY AND SELECTIVELY, ELECTROMAGNETIC RELAYS, REMOTE SET POINT AND FEEDBACK POTENTIOMETERS AND ANNUNCIATORS

PNEUMATIC ACTUATORS FOR VALVES AND DAMPERS, AIR COMPRESSORS, AIR DRYERS, AIR FILTERS, AIR PRESSURE REGULATORS, PNEUMATIC RELAYS, AFTER COOLERS AND PRESSURE GAUGES

INSTRUMENTS FOR MONITORING, MEASURING AND CONTROLLING CONDITIONS-NAMELY, SENSORS, SIGNAL MODULATORS AND INDICATORS RESPONSIVE TO CONDITION CHANGES INCLUDING TEMPERATURE, HUMIDITY, PRESSURE, HEAT, FLUID FLOW, POSITION, SETPOINT, FLAME, ETC.; HIGHEST, LOWEST, AND AVERAGE SIGNAL SELECTORS; CONDITION PROGRAMMERS; SIGNAL LIMITERS; SIGNAL AMPLIFIERS; LIMIT CONTROLLERS; ON-OFF CONTROLLERS; MODULATING AND TIME PROPORTIONING CONTROLLERS WITH AND WITHOUT AUTOMATIC RESET AND RATE ACTION; COMBUSTION SAFEGUARDS; CONTROL CENTERS, PANELS AND BOXES; ELECTROHYDRAULIC ACTUATORS; RECTIFIERS; SIGNAL CONVERTERS; AND REMOTE CONTROL AND MONITORING SYSTEMS EMPLOYING SAID INSTRUMENTS