Images are representations only.
Model 90 Low Pressure Selector Relay
Brand: Fairchild Industrial Products
The Rotork Fairchild 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 end or low flow service in critical applications such as control loops requiring precise, automatic monitoring of signal pressures.
Features- Small, rugged design
- Soft seat construction
- Low selection differential
- Fast response
- Automatic switching
Specifications
Pipe/Port Size
- 1/4"
Pipe/Port Thread Type
- NPT
- BSPT
Max. Signal or Output Pressure
- 200 psig : 14.0 bar : 1400 kPa
Min. Switching Differential
- Less than 0.1 psig : 0.007 bar : 0.7 kPa
Max. Differential Between Signals
- 100 psig : 7.0 bar : 700 kPa
Ambient Temperature Limits
- -40° F to +200° F (-40° C to 93.3° C)
Body & Housing Material
- Aluminum
Elastomers Material
- Viton (Fluorocarbon)
Diaphragm Material
- Dupont Fairprene-coated Fabric
Trim Material
- Brass
Ambient Temperature Range
- -40° to 93° C (-40° to 200° F)
Trim Material
- Brass
NPT Connection
- 1/4" NPT Female
Vent
- Straight
Enclosure, Body Material
- Aluminum Alloy
Differential Between Signals - Minimum
- > psig: 0.1 (bar: 0.007, kPa: 0.7)
Sensitivity
- Switching Differential: < 0.1 psi (< 0.7 kPa) - Max.
Elastomers
- Dupont Fairprene-Coated Fabric
- Fluorocarbon (Viton)
Mounting
- None
Relief
- Relieving
BSP Connection
- 1/4" BSPT Female
Differential Between Signals - Maximum
- bar: 7
- kPa: 700
- psig: 100
Signal or Output Pressure - Maximum
- bar: 14
- kPa: 1,400
- psig: 200
