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2.5 suppression.sprinklers.wk12b

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  • Very Good material if you have more regards desgin of sprinkler system will be appreciate
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  • 1. Types of Sprinkler Systems according to NFPA 13
    • Wet-pipe system
    • Dry-pipe system
    • Deluge system
    • Preaction system
  • 2. Types of Sprinkler Systems according to NFPA 13
    • 1. Wet-pipe system
    2. Dry-pipe system
    • Filled with water at all times
    • Filled with pressurized air or nitrogen normally
    • Oldest, simplest, most reliable
    • Dry-pipe main control valve must be in heated area
    • Air comes from dedicated compressor or facility-wide compressed air system
    • Opening of sprinkler head reduces the air pressure & water is released into the piping
    wet dry
  • 3. Types of Sprinkler Systems according to NFPA 13
    • 3. Deluge system
    • All sprinkler heads are OPEN, water flows out all at once
    • No water in piping
    • Heat/Smoke/Flame detectors sense fire condition & trip a deluge valve which allows water to flow
    • Usually for Extra-Hazard Occupancies
    • Require large volumes of water
    deluge dry
  • 4. Types of Sprinkler Systems according to NFPA 13 4. Preaction system
    • All sprinkler heads are CLOSED, sprinkler head has a heat-sensing device AND
    • No water in piping
    • Heat/Smoke/Flame detectors sense fire condition & trip a deluge valve which allows water to flow
    • Water flows out of any sprinkler heads that have opened … both actions needed
    • Used for areas especially sensitive to water damage
    preaction dry
  • 5. Dry-Pipe System Riser
  • 6. Dry-Pipe Valve - Clapper Valve is inside
  • 7. Dry-Pipe Valve - Clapper Valve inside view
  • 8. Clapper Valve closed: 50 psi of air holds clapper closed over water at 110 psi AIR 50 psi WATER 110 psi
  • 9. Clapper Valve opens when air is released through sprinkler head and water pressure becomes greater than air pressure AIR WATER 110 psi
  • 10. Air Compressor for Dry System
  • 11. Dry System - Loading Dock
  • 12. Preaction System* (3 slides) *pics from Nathan Kline Institute, Orangeburg, NY Preaction System protects sensitive medical equipment
  • 13.  
  • 14.  

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