Bi-Directional Flow Control Valve

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Bi-Directional Flow Control Valve

• Dale Bernier
• Judy Biddle
• Timothy Brown
• Christopher "Robby" Freeborn-Scott
• 5 November 2009

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Brief Overview

• Background
• Problem/Objective
• Design Concept
• Calculations
• Specifications/Cost

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Introduction Background

• September 11, 2001 Pentagon Attack

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Wet Pipe Sprinkler System
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Problem

• Currently, only one-directional mechanical flow
  valves are available on the market

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Objective

• Design and prototype a bi-directional flow
  control valve

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Single Riser Schematic
Fire Area -only the sprinkler heads affected by
the fire will activate
Riser
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Riser
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Double Riser Schematic
Riser
Riser
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Bi-Directional Flow Control Valve Schematic
Sprinkler Head
Bi-Directional Flow Control Valve
Spacing of control valve determined by sprinkler
system designer
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Design Selection
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Exploded View
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Cost Analysis
Does not include labor costs, fire pump, or flow
meters To be determined
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Calculations

• Assumptions
• Gravitational effect neglected
• Spring constants same
• Initial velocity is zero

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Free Body Diagram
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Spring Force
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Calculations
Also solved for 70, 80, 90, 100 gpm
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Conclusion

• Discussed
• Background
• Problem/Objective
• Design Concept
• Specifications/Cost
• Calculations

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References

• McMaster.com
• Fundamentals of Thermal-Fluid Science (3rd
  edition). By Robert Rizza, Prentice Hall, Inc.,
  2004
• http//upload.wikimedia.org/wikipedia/commons/d/d2
  /The_Pentagon_US_Department_of_Defense_building.jp
  g

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Questions