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Model 91 High Pressure Selector Relay

Brand: Fairchild Industrial Products
The Rotork Fairchild Model 91 High Pressure Selector Relay is designed to select the higher of two signal pressures and to provide a continuous output pressure (or pressure range) to a controller. 
 
The ability to precisely control pressure switching and pressure monitoring functions makes the Model 91 the logical choice in dead-end or low-flow applications such as precision control loops.
 

Fairchild Model 91 High-Pressure Selector Relay - SKU: 91052

The Fairchild Model 91 High-Pressure Selector Relay is designed for precise and reliable performance in high-pressure applications.

Key specifications include:

  • Maximum Signal Pressure
    • 200 psig
    • 14.0 bar
    • 1400 kPa
  • Minimum Switching Differential
    • < 0.1 psig (0.007 bar, 0.7 kPa)
  • Maximum Differential Between Signals
    • 100 psig (7.0 bar, 700 kPa)
  • Pipe Size
    • 1/4” NPT

Constructed with a durable aluminum alloy body, brass trim, and a Dupont Fairprene-coated fabric diaphragm, this relay ensures longevity and efficient operation under demanding conditions.

Features
  • Small, rugged design suitable for installation where space is limited.
  • Soft seat construction to assure positive shutoff.
  • Low selection differential to allow precise control of switching.
  • Fast response that is suitable for control in critical loops.
  • Automatic switching that eliminates manual monitoring of signal pressure.
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The Rotork Fairchild Model 91 High Pressure Selector Relay is designed to select the higher of two signal pressures and to provide a continuous output pressure (or pressure range) to a controller. 
 
The ability to precisely control pressure switching and pressure monitoring functions makes the Model 91 the logical choice in dead-end or low-flow applications such as precision control loops.
 

Fairchild Model 91 High-Pressure Selector Relay - SKU: 91052

The Fairchild Model 91 High-Pressure Selector Relay is designed for precise and reliable performance in high-pressure applications.

Key specifications include:

  • Maximum Signal Pressure
    • 200 psig
    • 14.0 bar
    • 1400 kPa
  • Minimum Switching Differential
    • < 0.1 psig (0.007 bar, 0.7 kPa)
  • Maximum Differential Between Signals
    • 100 psig (7.0 bar, 700 kPa)
  • Pipe Size
    • 1/4” NPT

Constructed with a durable aluminum alloy body, brass trim, and a Dupont Fairprene-coated fabric diaphragm, this relay ensures longevity and efficient operation under demanding conditions.

Features
  • Small, rugged design suitable for installation where space is limited.
  • Soft seat construction to assure positive shutoff.
  • Low selection differential to allow precise control of switching.
  • Fast response that is suitable for control in critical loops.
  • Automatic switching that eliminates manual monitoring of signal pressure.
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Displaying prices & availability for Ohio, United States 43201 in USD. Change location or currency.

Models matching criteria: 1
91052
FAIRCHILD Model 91 High Pressure Selector Relay, 1/4" NPT view more
  • Model: 91 High 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
50+ In Stock
$431.06 USD / each
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Specifications

Brand

BSP Connection

  • 1/4" BSPT Female

Ambient Temperature Range

  • -40° to 93° C (-40° to 200° F)

Differential Between Signals - Maximum

  • bar: 7
  • kPa: 700
  • psig: 100

Trim Material

  • Brass

Differential Between Signals - Minimum

  • > psig: 0.1 (bar: 0.007, kPa: 0.7)

Enclosure, Body Material

  • Aluminum Alloy

NPT Connection

  • 1/4" NPT Female

Elastomers

  • Dupont Fairprene-Coated Fabric
  • Fluorocarbon (Viton)

Signal or Output Pressure - Maximum

  • bar: 14
  • kPa: 1,400
  • psig: 200

Mounting

  • None

Relief

  • Relieving

Vent

  • Straight

Sensitivity

  • Switching Differential: < 0.1 psi (< 0.7 kPa) - Max.
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Operating Principle

The Model 91 High Pressure Selector Relay is designed to select the higher of two signal pressures and to provide a continuous output pressure (or pressure range) to a controller. The ability to precisely control switching and pressure monitoring makes the Model 91 the logical choice in dead-end or low-flow applications such as precision control loops.

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