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However please note there may be a delay on some deliveries due to supply chain issues during the COVID-19 Coronavirus crisis.

Just to let you know we’re still open for Business as normal but working remotely with reduced warehouse staff.
However please note there may be a delay on some deliveries due to supply chain issues during the COVID-19 Coronavirus crisis.
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Fairchild Pneumatic Relays

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Fine Controls offers an extensive line of Fairchild pneumatic relays, serving a multitude of control applications: positive biasing relays, positive and negative biasing relays, infinitely adjustable ratio relays, reversing relays, averaging and computing relays, high and low pressure selectors, and high and low pressure limiting relays.

Positive and Negative Bias Relays are designed for applications that require an output pressure that is the sum of a controlled input signal plus or minus a fixed bias. Fairchild's line up of biasing pneumatic relay products include both positive biasing relays, such as the Models 15, 85D and 1500A and relays that handle both positive and negative biasing functions such as the Model 14.

FAIRCHILD MODEL 14 - POSITIVE & NEGATIVE BIAS RELAY Model Number: 14

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.

FAIRCHILD MODEL 15 - POSITIVE BIAS RELAY Model Number: 15

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

FAIRCHILD MODEL 1500A - POSITIVE BIAS RELAY Model Number: 1500A

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

FAIRCHILD MODEL 21 - ADJUSTABLE RATIO RELAY Model Number: 21

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. Pipe size 1/4' NPT - 3/8' NPT/BSPT.

FAIRCHILD MODEL 22 - COMPUTING RELAY Model Number: 22

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.

FAIRCHILD MODEL 25 - REVERSING RELAY Model Number: 25

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.

FAIRCHILD MODEL 2500A - BIASING REVERSING RELAY Model Number: 2500A

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.

FAIRCHILD MODEL 85D - MULTI STAGE BIASING RELAY Model Number: 85D

Flow capacity 14 SCFM. 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.

FAIRCHILD MODEL 90/91 - HI & LOW SELECTOR RELAY Model Number: 90/91

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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Whatever your industry, project or bespoke requirements, our support team is made up entirely of qualified and experienced engineers who are fully conversant with the entire Fairchild product range, so why not give us a call on +44 (0) 800 328 8511 and we'll work with you to find the most suitable products. We also offer bespoke system design services and can advise on several other brands including Siemens, and Honeywell. Contact us online or call on +44 (0) 800 328 8511.

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