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PNEUMATIC RELAYS
This extensive line of Fairchild air relays serve a multitude of pneumatic control applications: positive biasing, positive and negative biasing, infinitely adjustable ratio, reversing, averaging and computing, high and low pressure selectors, and high and low pressure limiting, and other options are available for these pneumatic relays. |
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| Image |
Model |
Description |
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.gif "14") |
14 |
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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.gif "15") |
15 |
FAIRCHILD MODEL 15: PNEUMATIC RELAY
• 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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.gif "1500A") |
1500A |
FAIRCHILD MODEL 1500A: PNEUMATIC RELAY
• Supply pressure 250 psig max
• Flow capacity (SCFM) 150
• Sensitivity 1” Water Column
• Adjustment range 0.5-10 psig
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.gif "21") |
21 |
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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.gif "22") |
22 |
MODEL 22: FAIRCHILD 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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.gif "24") |
24 |
MODEL 24: FAIRCHILD 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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.gif "25") |
25 |
MODEL 25: FAIRCHILD 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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