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Model 24 Snap Acting Relay

Brand: Fairchild Industrial Products
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The Rotork Fairchild Model 24 Snap Acting Relay is a highly accurate differential relay with snap-acting switching.

The output of the unit will go to supply pressure when the signal is equal to or greater than the setpoint. 

The signal pressure must fall below the set point to return the output to zero.

This pneumatic relay's Near Zero Throttling and Pilot Staging result in true snap-action in your application.
Features
  • Control Sensitivity of 1/8" water column
  • Balanced supply valve
  • Aspirator tube design
  • Separate control chamber
  • Unit construction
  • Designed for use in precision applications
  • Minimizes the effects of supply pressure variation
  • Compensates for output pressure droop under flow conditions
  • Isolates the diaphragm from the main flow to eliminate hunting and buzzing
  • Allows servicing without removal from air line
The Rotork Fairchild Model 24 Snap Acting Relay is a highly accurate differential relay with snap-acting switching.

The output of the unit will go to supply pressure when the signal is equal to or greater than the setpoint. 

The signal pressure must fall below the set point to return the output to zero.

This pneumatic relay's Near Zero Throttling and Pilot Staging result in true snap-action in your application.
Features
  • Control Sensitivity of 1/8" water column
  • Balanced supply valve
  • Aspirator tube design
  • Separate control chamber
  • Unit construction
  • Designed for use in precision applications
  • Minimizes the effects of supply pressure variation
  • Compensates for output pressure droop under flow conditions
  • Isolates the diaphragm from the main flow to eliminate hunting and buzzing
  • Allows servicing without removal from air line
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Specifications

Brand

Actuator Type

  • Knob Adjust
  • Tamper-Proof

Air Consumption

  • Maximum

Ambient Temperature Range

  • -40° to 93° C (-40° to 200° F)

BSP Connection

  • 1/2” BSPT Female
  • 1/4” BSPT Female
  • 3/8” BSPT Female

Elastomers

  • Buna-N on Dacron
  • Fluorocarbon (Viton)

Enclosure, Body Material

  • Aluminum

Exhaust Capacity - Relieving Units Only

  • 14 scfm
  • 14 scfm (23.8 m³/hour) at psig: 100 (bar: 7, kPa: 700) Drop
  • 23.8 m³/hour

Flow Capacity

  • 14 scfm (23.8 m³/hour)
  • 14 scfm (23.8 m³/hour) at psig: 100 (bar: 7, kPa: 700) Supply
  • 23.8 m³/hour (30)

Mounting

  • Panel Mount
  • Pipe

NPT Connection

  • 1/2” NPT Female
  • 1/4” NPT Female
  • 3/8” NPT Female

Pressure Range

  • bar: 0.03 to 4
  • bar: 0.15 to 8
  • kPa: 0.63 to 800
  • psig: 0.5 to 120

Relief

  • Relieving

Sensitivity

  • 0.2” WC to 0.5 psig (Depending on Model)

Signal or Output Pressure - Maximum

  • bar: 8
  • kPa: 800
  • psig: 120

Supply Pressure - Maximum

  • bar: 8
  • kPa: 800
  • psig: 120

Supply Pressure Effect

  • psig: 10 (bar: 0.7, kPa: 70) Use Separate Supply Option if Inlet is less than psig: 10 (bar: 0.7, kPa: 70)

Trim Material

  • Stainless Steel
  • Zinc-Plated Steel

Vent

  • Straight
  • Tapped Exhaust
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