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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
1 - 4 of 4 Part Numbers
90052
- Models: 90 Low Pressure Selector
- Maximum Signal Pressure: 200 psig, 14.0 bar, 1400 kPa
- Switching Differential (Minimum) : Less than 0.1 psig, 0.007 bar, 0.7 kPa
- Differential between Signals (Maximum): 100 psig, 7.0 bar, 700 kPa
- Pipe Size: 1/4" NPT
- Material of Construction:
- Body: Aluminum Alloy
- Trim: Brass
- Diaphragm: Dupont Fairprene-Coated Fabric
90052-Z21811
90052J
- Port Size - 1/4" NPT
- Elastomers - Fluorocarbon (Viton)
90052U
- Port Size - 1/4" NPT
- Elastomers - Dupont Fairprene-Coated Fabric
- Port Thread - BSPT (Tapered)
1 - 4 of 4 Part Numbers
Specifications
Ambient Temperature Range
- -40° to 93° C (-40° to 200° F)
BSP Connection
- 1/4” BSPT Female
Differential Between Signals - Maximum
- bar: 7
- kPa: 700
- psig: 100
Differential Between Signals - Minimum
- > psig: 0.1 (bar: 0.007, kPa: 0.7)
Elastomers
- Dupont Fairprene-Coated Fabric
- Fluorocarbon (Viton)
Enclosure, Body Material
- Aluminum Alloy
Mounting
- None
NPT Connection
- 1/4” NPT Female
Relief
- Relieving
Sensitivity
- Switching Differential: < 0.1 psi (< 0.7 kPa) - Max.
Signal or Output Pressure - Maximum
- bar: 14
- kPa: 1,400
- psig: 200
Trim Material
- Brass
Vent
- Straight