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Model 20 Pneumatic Precision Volume Booster

Brand: Fairchild Industrial Products

The Rotork Fairchild Model 20 Volume Booster is a smaller pneumatic device capable of high flow and exhaust capacity.

This device uses a force balance system to control the movement of the supply and exhaust valves.

As a pilot operated regulator design, the M20 handles up to 150 psig, [10.0 BAR], (1,000 kPa) supply pressure and has ten available ratios to cover a wide range of applications.

The M20 Booster provides a flow capacity of 45 SCFM (76.5 m3/HR), which equates to a Cv factor of approximately 1.0 in forward mode.

Typical Part Numbers are 20812, 20822, 20832, 20842, 20852, 20862, 20813, 20823, 20833, 20843, 20853, 20863
Features
  • Flow capacity of 45 SCFM (76.5 m3/HR)
  • Ten available pressure ratios
  • Optional Adjustable By-Pass Needle Valve option includes bubble tight exhaust valve
  • Optional Fixed Negative Bias
  • A separate Control Chamber isolates the diaphragm from the main flow
  • Unit construction
  • Mounting Bracket available
  • Canadian Registration Number (CRN) Certification

1 - 12 of 1,000 Part Numbers
19513-12
19513-12
FAIRCHILD Service Kit, Model 20, 1:2 Ratio
208102
208102
FAIRCHILD Model 20 Pneumatic Precision High Capacity Volume Booster, 1:6 Ratio, 1/4" NPT
  • Ratio: 1:6
  • Supply Pressure (Maximum): 250 psig, 17 bar, 1700 kPa
  • Pipe Size: 1/4" NPT
  • Pipe Thread: NPT
  • Ambient Temperature: -40°F to +200° (-40°C to +93.3°C)
  • Material of Construction:
    • Body & Housing: Aluminum
    • Trim: Zinc Plated Steel, Brass
    • Diaphragms: Nitrile on Dacron Fabric
208102H
208102H
  • Ratio - 1:6
  • Port Size - 1/4" NPT
  • Port Thread - BSPP (Parallel)
  • Elastomers - Nitrile on Dacron
  • Relief - Relieving
  • Output Options - None
208102J
208102J
  • Ratio - 1:6
  • Port Size - 1/4" NPT
  • Port Thread - NPT
  • Elastomers - Fluorocarbon (Viton)
  • Relief - Relieving
  • Output Options - None
208102JH
208102JH
  • Ratio - 1:6
  • Port Size - 1/4" NPT
  • Port Thread - BSPP (Parallel)
  • Elastomers - Fluorocarbon (Viton)
  • Relief - Relieving
  • Output Options - None
208102JU
208102JU
  • Ratio - 1:6
  • Port Size - 1/4" NPT
  • Port Thread - BSPT (Tapered)
  • Elastomers - Fluorocarbon (Viton)
  • Relief - Relieving
  • Output Options - None
208102U
208102U
  • Ratio - 1:6
  • Port Size - 1/4" NPT
  • Port Thread - BSPT (Tapered)
  • Elastomers - Nitrile on Dacron
  • Relief - Relieving
  • Output Options - None
208103
208103
FAIRCHILD Model 20 Pneumatic Precision High Capacity Volume Booster, 1:6 Ratio, 3/8" NPT

  • Ratio: 1:6

  • Supply Pressure (Maximum): 250 psig, 17 bar, 1700 kPa

  • Pipe Size: 3/8" NPT

  • Pipe Thread: NPT

  • Ambient Temperature: -40°F to +200° (-40°C to +93.3°C)

  • Material of Construction:

    • Body & Housing: Aluminum
    • Trim: Zinc Plated Steel, Brass
    • Diaphragms: Nitrile on Dacron Fabric
    208103H
    208103H
    • Ratio - 1:6
    • Port Size - 3/8" NPT
    • Port Thread - BSPP (Parallel)
    • Elastomers - Nitrile on Dacron
    • Relief - Relieving
    • Output Options - None
    • Increased Adjustability - None
    • Exhaust Port - Straight
    208103J
    208103J
    • Ratio - 1:6
    • Port Size - 3/8" NPT
    • Port Thread - NPT
    • Elastomers - Fluorocarbon (Viton)
    • Relief - Relieving
    • Output Options - None
    • Increased Adjustability - None
    • Exhaust Port - Straight
    208103JH
    208103JH
    • Ratio - 1:6
    • Port Size - 3/8" NPT
    • Port Thread - BSPP (Parallel)
    • Elastomers - Fluorocarbon (Viton)
    • Relief - Relieving
    • Output Options - None
    • Increased Adjustability - None
    • Exhaust Port - Straight
    208103JU
    208103JU
    • Ratio - 1:6
    • Port Size - 3/8" NPT
    • Port Thread - BSPT (Tapered)
    • Elastomers - Fluorocarbon (Viton)
    • Relief - Relieving
    • Output Options - None
    • Increased Adjustability - None
    • Exhaust Port - Straight
    1 - 12 of 1,000 Part Numbers

    Specifications

    Ambient Temperature Range

    • -40° to 93° C (-40° to 200° F)

    BSP Connection

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

    Elastomers

    • Fluorocarbon (Viton)
    • Nitrile on Dacron
    • Silicone

    Enclosure, Body Material

    • Aluminum

    Environmental Protection

    • Acceptable for use in Zones 1 & 2 for Gas Atmosphere, Groups IIA & IIB & Zones 21 & 22 for Dust Atmospheres

    Exhaust Capacity - Relieving Units Only

    • 11 scfm (18.7 m³/hour)
    • 12.8 to 18.7 m³/hour
    • 7.5 scfm (12.8 m³/hour) where Downstream Pressure is psig: 5 (bar: 0.35, kPa: 35) Above Output Pressure Set Point of psig: 20 (bar: 1.5, kPa: 150)
    • 7.5 to 11 scfm

    Flow Capacity

    • 45 scfm
    • 45 scfm (76.5 m³/hour) at psig: 100 (bar: 7, kPa: 700) Supply, psig: 20 (bar: 1.5, kPa: 150) Output
    • 76.5 m³/hour (30)

    NPT Connection

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

    Output Pressure - Maximum

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

    Ratio

    • 1:1
    • 1:2
    • 1:3
    • 1:4
    • 1:5
    • 1:6
    • 2:1
    • 3:1
    • 4:1
    • 5:1

    Relief

    • Non-Relieving
    • Relieving

    Sensitivity

    • 1” WC (2.54 cm)
    • 1/2” WC (1.27 cm)
    • 1/4” WC (0.64 cm)
    • 1-1/2” WC (3.8 cm)
    • 1-1/4” WC (3.18 cm)
    • 3/4” WC (1.9 cm)

    Supply Pressure - Maximum

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

    Supply Pressure Effect

    • bar: 0.007 to 0.041
    • kPa: 0.7 to 4.1
    • psig: 0.1 to 0.7

    Trim Material

    • Brass
    • Zinc-Plated Steel

    Vent

    • Straight
    • Tapped Exhaust
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