Fairchild Adjustable Ratio Relay, Model 21
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21312UT

Series: Model 21 Adjustable Ratio Relay Brand: Fairchild Industrial Products - by Rotork
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  • Port Size - 1/4" NPT
  • Port Thread - BSPT (Tapered)
  • Actuation Adjustment Means - Tamper Proof
  • Output Options - Standard
  • Elastomers - Standard

Specifications

Brand

Actuator Type

  • Tamper-Proof

Ambient Temperature Range

  • -40° to 93° C (-40° to 200° F)

BSP Connection

  • 1/4" BSPT Female
  • 3/8" BSPT Female

Diaphragm Material

  • Buna-N
  • Dacron

Enclosure, Body Material

  • Aluminum

Exhaust Capacity - Relieving Units Only

  • 5.5 scfm (9.4 m³/hour)

Flow Capacity

  • 40 scfm (68 m³/hour)

NPT Connection

  • 1/4" NPT Female
  • 3/8" NPT Female

Sensitivity

  • 1/2" WC (1.27 cm)

Signal or Output Pressure - Maximum

  • bar: 10
  • kPa: 1,000
  • psig: 150

Supply Pressure - Maximum

  • bar: 17
  • kPa: 1,700
  • psig: 250

Supply Pressure Effect

  • psig: 0.1 (bar: 0.007, kPa: 0.7) for a psig: 100 (bar: 7, kPa: 700) Change in Supply Pressure

Trim Material

  • Brass
  • Stainless Steel
  • Zinc-Plated Steel

Documentation

Data Sheets

Installation Instructions

View Product Series

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