Fairchild Pneumatic Precision Back Pressure Booster, Model 20BP
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Model 20BP Pneumatic Back Pressure Booster

Brand: Fairchild Industrial Products

The Rotork Fairchild Model 20BP is a smaller Back Pressure Pneumatic Booster designed for automated or remote controlling of the back pressure or relief operation typically found in tank systems and other pressurized systems. 
 
In its pilot operated design, the M20BP will operate from a signal pressure of up to 150 psig [10.0 BAR] (1,000 kPa) and handles up 250 psig (17.0 BAR, 1,700 kPa) system pressure.
 
The Fairchild Model 20BP Back Pressure Booster provides a flow capacity of 45 SCFM (76.5 m3/Hr), which equates to a Cv factor of approximately 1.0.
Features
  • Flow capacity of 45 SCFM (76.5 m3/Hr)
  • Aspirator tube design
  • A separate Control Chamber isolates the diaphragm from the main flow
  • Unit construction
  • Mounting Bracket available

Specifications

Brand

Ratio

  • 1:1

Pipe/Port Size

  • 1/4"
  • 3/8"
  • 1/2"

Pipe/Port Thread Type

  • NPT
  • BSPP
  • BSPT

Approvals

  • CRN

Hazardous Areas

  • Acceptable in Zones 1–2 (gas, Groups IIA & IIB) and Zones 21–22 (dust).

Max. System Pressure

  • 250 psig : 17.0 bar : 1000 kPa

Ratio Accuracy

  • 1.0% of 100 psig : 7.0 bar : 700 kPa input span.

Flow Capacity

  • 60 scfm (101.9 m³/hr) @ 100 psig : 7.0 bar : 700 kPa system pressure.

Max. Signal or Output Pressure

  • 150 psig : 10 bar : 1000 kPa

Sensitivity

  • 1/4" (0.63 cm) W.C.

Ambient Temperature Limits

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

Body & Housing Material

  • Aluminum

Elastomers Material

  • Silicone
  • Viton (Fluorocarbon)

Diaphragm Material

  • Nitrile on Dacron

Trim Material

  • Brass, Zinc-Plated Steel

NPT Connection

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

Elastomers

  • Silicone
  • Viton (Fluorocarbon)

Ratio Accuracy

  • 1.0 % of psig:100 (kPa:700, bar:7) Input Span

Diaphragm Material

  • Nitrile on Dacron

BSP Connection

  • 1/2" BSPP Female
  • 1/2" BSPT Female
  • 1/4" BSPP Female
  • 1/4" BSPT Female
  • 3/8" BSPP Female
  • 3/8" BSPT Female

Ambient Temperature Range

  • -40° to 93.3° C (-40° to 200° F)

Sensitivity

  • 1/4 inH₂O (0.64 cm)

Signal or Output Pressure - Maximum

  • psig: 150 (kPa: 1,000, bar: 10)

Environmental Protection

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

Trim Material

  • Brass
  • Zinc-Plated Steel

Supply Pressure - Maximum

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

Enclosure, Body Material

  • Aluminum

Mounting

  • Bracket Kit

Ratio

  • 1:1

Flow Capacity

  • 60 scfm (102 m³/hour) at psig: 100 (kPa: 700, bar: 7) Supply

Documentation

Data Sheets

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