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Fairchild Pneumatic Volume Booster, Model 4900A

Model 4900A Pneumatic Volume Booster

Brand: Fairchild Industrial Products
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Rotork Fairchild’s M4900A is a High Flow Pneumatic Volume Booster designed for high precision applications.

With its Cv of 9 in both forward and exhaust modes, this pilot operated booster provides fast response, very low deadband and high precision control. 

In its pilot operated regulator design, the M4900A handles up 250 psig, [17.0 BAR], (1,700 kPa) supply pressure and delivers an output pressure up to 150 psig [10.0 BAR] (1,000 kPa).

The Fairchild Model 4900A Booster provides a flow capacity of 500 SCFM (850 m3/Hr), which equates to a Cv factor of approximately 9 in both forward and exhaust modes.
Features
  • Cv = 9; Flow capacity of 500 SCFM (850 m3/Hr)
  • Ratio Accuracy of 0.5%
  • Very low deadband between the operation of the supply valve and exhaust valve
  • High capacity exhaust valve
  • Large area diaphragms
  • Soft seat supply and exhaust valves
  • Pressure balanced supply valve
  • Damped diaphragm control chamber
  • Two accessory ports connected to the outlet chamber
  • Tapped exhaust port

1 - 12 of 48 Part Numbers
4916AHJNF
4916AHJNF
  • Ratio - 1:1
  • Port Size - 3/4"
  • Port Thread - BSPP
  • Elastomers - Fluorocarbon
  • Feedback Option - No Feedback Port
  • Trim - Zinc-Plated Steel
4916AHJNS
4916AHJNS
  • Ratio - 1:1
  • Port Size - 3/4"
  • Port Thread - BSPP
  • Elastomers - Fluorocarbon
  • Feedback Option - No Feedback Port
  • Trim - Stainless Steel
4916AHJPF
4916AHJPF
  • Ratio - 1:1
  • Port Size - 3/4"
  • Port Thread - BSPP
  • Elastomers - Fluorocarbon
  • Feedback Option - Feedback Port
  • Trim - Zinc-Plated Steel
4916AHJPS
4916AHJPS
  • Ratio - 1:1
  • Port Size - 3/4"
  • Port Thread - BSPP
  • Elastomers - Fluorocarbon
  • Feedback Option - Feedback Port
  • Trim - Stainless Steel
4916AHNNF
4916AHNNF
  • Ratio - 1:1
  • Port Size - 3/4"
  • Port Thread - BSPP
  • Elastomers - Nitrile
  • Feedback Option - No Feedback Port
  • Trim - Zinc-Plated Steel
4916AHNNS
4916AHNNS
  • Ratio - 1:1
  • Port Size - 3/4"
  • Port Thread - BSPP
  • Elastomers - Nitrile
  • Feedback Option - No Feedback Port
  • Trim - Stainless Steel
4916AHNPF
4916AHNPF
  • Ratio - 1:1
  • Port Size - 3/4"
  • Port Thread - BSPP
  • Elastomers - Nitrile
  • Feedback Option - Feedback Port
  • Trim - Zinc-Plated Steel
4916AHNPS
4916AHNPS
  • Ratio - 1:1
  • Port Size - 3/4"
  • Port Thread - BSPP
  • Elastomers - Nitrile
  • Feedback Option - Feedback Port
  • Trim - Stainless Steel
4916ANJNF
4916ANJNF
  • Ratio - 1:1
  • Port Size - 3/4"
  • Port Thread - Female NPT
  • Elastomers - Fluorocarbon
  • Feedback Option - No Feedback Port
  • Trim - Zinc-Plated Steel
4916ANJNS
4916ANJNS
  • Ratio - 1:1
  • Port Size - 3/4"
  • Port Thread - Female NPT
  • Elastomers - Fluorocarbon
  • Feedback Option - No Feedback Port
  • Trim - Stainless Steel
4916ANJPF
4916ANJPF
  • Ratio - 1:1
  • Port Size - 3/4"
  • Port Thread - Female NPT
  • Elastomers - Fluorocarbon
  • Feedback Option - Feedback Port
  • Trim - Zinc-Plated Steel
4916ANJPS
4916ANJPS
  • Ratio - 1:1
  • Port Size - 3/4"
  • Port Thread - Female NPT
  • Elastomers - Fluorocarbon
  • Feedback Option - Feedback Port
  • Trim - Stainless Steel
1 - 12 of 48 Part Numbers

View_Details

Specifications

Brand

Ambient Temperature Range

  • -40° to 93.3° C (-40° to 200° F)

Approvals & Certifications

  • CRN

BSP Connection

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

Diaphragm Material

  • Nitrile on Dacron

Elastomers

  • Fluorocarbon
  • Nitrile

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

  • 100 scfm (170 m³/hour)

Flow Capacity

  • 500 scfm (850 m³/hour) at psig: 100 (kPa: 700, bar: 7)

Flow Rate

  • 9.0 Cv

NPT Connection

  • 1” NPT Female
  • 3/4” NPT Female

Ratio

  • 1:1

Ratio Accuracy

  • 0.5 % of psi: 100 (kPa: 700, bar: 7) Output Span

Signal or Output Pressure - Maximum

  • psig: 150 (kPa: 1,000, bar: 10)

Supply Pressure - Maximum

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

Supply Pressure Effect

  • psi: 0.10 (kPa: 0.7, bar: 00.7) for psi: 100 (kPa: 700, bar: 7) Change in Supply Pressure

Trim Material

  • Stainless Steel
  • Zinc-Plated Steel

Documentation

Data Sheets

Installation Instructions

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