Fairchild 14SR Air Loading Multiplying Relay

The Fairchild 14SR Air Loading Multiplying Relay operates as a specialized pneumatic component designed to scale incoming pressure signals according to predetermined ratios within automated instrumentation loops. Utilizing an air-loading mechanism to govern reaction speed and sensitivity, this unit modifies standard incoming signal pressures to fulfill specific output requirements set by system design engineers. Technicians frequently deploy this mechanical multiplier to align disparate instruments in a loop, ensuring that transmitter outputs convert correctly to valve positioners or controller actuators. Common applications include refining, petrochemical processing, and HVAC control loops where standardized air signals require adjustment or gain correction before actuating final equipment. Because the 14SR functions mechanically through air power, it provides stable signal handling without reliance on external electrical power sources or digital conversion hardware.