Fine Controls (UK) Ltd

FAIRCHILD MODEL 1500A - PNEUMATIC RELAY

The Model 1500A Positive Bias Relay is designed for applications that require an output pressure that is the sum of a controlled input signal and a fixed bias. This unit can handle up to 250 psig supply pressure with up to 150 psig output, and has a flow capacity of 150 SCFM.

• Supply pressure 250 psig max
• Flow capacity (SCFM) 150
• Sensitivity 1” Water Column
• Adjustment range 0.5-10 psig

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FAIRCHILD MODEL 14 - PNEUMATIC RELAY

The Model 14 Positive and Negative Bias Relay is designed for use in applications for the reproduction of a signal pressure plus or minus a preset bias. The Model 14 is well-suited to range shifting and tension control applications. Provides either a positive or negative spring bias range from –18 to + 2 psig up to –18 + 100 psig.

• Flow capacity 40 SCFM @ 100 psig supply, 20 psig set point
• Sensitivity 1/2" Water Column
• Supply Pressure 250 psig maximum
• Output Pressure 150 psig maximum
• Pipe size 1/4" NPT - 3/8" NPT/BSPT

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FAIRCHILD MODEL 15 - PNEUMATIC RELAY

The Model 15 Positive Bias Relay is designed for applications that require an output pressure that is the sum of a controlled input signal and a fixed bias. Sensitivity to ¼” water gauge and a flow rate of up to 40 SCFM makes the Model 15 perfect for both high flow and precision applications.

• Flow Cap. 40 SCFM @ 100 psig
• Sensitivity 1/4" Water Column
• Supply Pressure 250 psig max
• Output Pressure 150 psig max

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FAIRCHILD MODEL 21 - PNEUMATIC RELAY

The Model 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 @ 100 psi supply, 20 psi set point
• Sensitivity 0.5" Water Column
• Supply pressure 250 psi maximum, Out let pressure 150 psi maximum
• Ratio range 30:1 through 1:30
• Operating pressure (minimum) 0.5 psi
• Pipe size 1/4" NPT - 3/8" NPT/BSPT

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FAIRCHILD MODEL 22 - PNEUMATIC RELAY

The Model 22 Pneumatic Computing Relay is a highly versatile control designed to perform a number of specialized functions, including averaging, differential, inverting and totalizing. Which offers up to four inputs as well as positive and negative biasing over a broad range.

• Adjustable bias over range -18 to + 15 psig
• Input and output pressure range 3-15 psig
• Maximum operating pressure:
• Signal and output 50 psig Supply 150 psig
• Pipe size 1/4" NPT - 3/8" NPT

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FAIRCHILD MODEL 24 - PNEUMATIC RELAY

The Model 24 Snap Acting Relay functions as a highly accurate, repeatable differential pressure switch. This precision control may be set up to operate with one signal, or may be biased to respond to a pneumatic set point.

• Maximum supply pressure 120 psig
• Signal range 2" Water Column to 120 psig
• Repeatability 0.2" Water Column
• Adjustment range 2" W.C.-10 to 2.0-120
• Inlet and Outlet 1/4" 3/8"

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FAIRCHILD MODEL 25 - PNEUMATIC RELAY

The Model 25 Reversing Relay is designed for applications requiring an output that equals a manually preset spring load minus a variable signal pressure.

• Flow capacity 40 SCFM @ 100 psi supply, 20 psi set
• Sensitivity 1/8" Water Column
• Supply Pressure 250 psi maximum
• Output pressure 150 psi maximum
• Adjustment range 0-10 psig to 2-150 psig
• Pipe size 1/4" NPT - 1/2" NPT/BSPT

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FAIRCHILD MODEL 2500A - PNEUMATIC RELAY

The Model 2500A Bias Reversing Relay provides output pressure that decreases in direct proportion to increase in input signal. Unit construction lets you service the Model 2500A without removing it from the line.

• Supply Pressure 250 psig Maximum
• Output Pressure 150 psig Maximum
• Flow Capacity (SCFM) 150 @ 100 psig supply & 20 psig set point
• Sensitivity 1" Water Column
• Adjustment range 0.5-10 psig to 2-150 psig
• Pipe size 3/8" NPT - 3/4" NPT 

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FAIRCHILD MODEL 85D - PNEUMATIC RELAY

The Model 85D Multi-Stage Biasing Relay is a precision control combining the sensitivity of a precision pressure regulator with positive biasing capability. This compact, pilot-operate device offers unusually high output capacity with minimal air consumption.

• Flow capacity 14 SCFM @ 100 psig supply, 20 psig set
• Pressure change under flow conditions less than 0.1 psig
• Maximum supply pressure 250 psig
• Maximum signal or output pressure 150 psig
• Adjustment range 0-20 psig to 1-100 psig
• Pipe size 1/8" NPT - 3/8" NPT/BSPT 

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FAIRCHILD MODEL 90/91 - PNEUMATIC RELAY

The Model 90 Low Pressure Selector Relay is designed to select the lower of two signal pressures to provide a continuous output pressure to a control device. The Model 90 is recommended for dead or low flow service in critical applications.

• Maximum signal pressure 200 psig
• Minimum switching differential less than .1 psig
• Maximum differential between signals 100 psig
• Port size 1/4" NPT/BSPT

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