The Fairchild 14 Positive and Negative Bias Relay is designed for applications that require an output pressure that is the sum of a controlled input signal plus or minus a fixed bias.

Flow Capacity: 40 SCFM (68 m3/HR)
Maximum Output Pressure: 150 psig (1000 kPa)
Maxmum Supply Pressure: 250 psig (1700 kPa)

The Fairchild 15 Positive Bias Relay is designed for applications that require an output pressure that is the sum of a controlled input signal plus a fixed bias.

Flow Capacity: 40 SCFM (68 m3/HR)
Maximum Output Pressure: 150 psig (1000 kPa)
Maxmum Supply Pressure: 250 psig (1700 kPa)

The Fairchild 21 Adjustable Ratio Relay, by means of a movable fulcrum design, allows infinite signal multiplication/division over the range of 1:30 to 30:1 by turning a simple adjustment knob. Preset input and output biasing are also possible with this high quality unit.

Flow Capacity: 40 SCFM (68 m3/HR)
Maximum Output Pressure: 150 psig (1000 kPa)
Maxmum Supply Pressure: 250 psig (1700 kPa)

The Fairchild 22 Pneumatic Computing Relay is a highly versatile control valve design to perform a number of specialised functions, including averaging, differential, inverting and totalising. This high quality unit, which offers up to four inputs as well as positive and negative biasing over a broad range, is available in several configurations to meet most application requirements.

Flow Capacity: 40 SCFM (68 m3/HR)
Maximum Output Pressure: 3-15 psig (20-100 kPa)
Maximum Supply Pressure: 250 psig (1700 kPa)

The Fairchild 24 Snap Acting Relay is a highly accurate differential relay with snap-acting switching. The output of the unit will go to supply pressure when the signal is equal to or greater than the setpoint. The signal pressure must fall below the set point to return the output to zero.

Flow Capacity: 14 SCFM (23.8 m3/HR)
Maximum Output Pressure: 120 psig (800 kPa)
Maximum Supply Pressure: 120 psig (800 kPa)