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Automatic Nozzles

Automatic Nozzles. Hand Held Stream Evolution. 1960’s & 70’s Automatic pressure regulating nozzles invented. Pressure Regulation Concept. How Does Pressure Regulation Work?. Pressure Stays Constant as Flow Changes. Baffle Opens as Flow Increases.

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Automatic Nozzles

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  1. Automatic Nozzles

  2. Hand Held Stream Evolution... • 1960’s & 70’s • Automatic pressure regulating nozzles invented

  3. Pressure Regulation Concept

  4. How Does Pressure Regulation Work?

  5. Pressure Stays Constant asFlow Changes

  6. Baffle Opens as Flow Increases

  7. Nozzle PressureAutomatic & Fixed Flow Nozzles

  8. Automatic Master Stream Nozzle

  9. Automatic Nozzle Benefits... • Consistent hard-hitting streams • Correct nozzle pressure with available flow • Maximum reach with available water • Able to adjust to varying water supply conditions • Nozzle reaction is a direct indication of flow • Nozzle flow control (with slide valve)

  10. Disadvantages of Automatic Nozzles... • Higher initial cost • Design unfamiliar to repair personnel • May not provide adequate water at extremely low pressures • Stream may look good, but may not be providing adequate water for extinguishment or protection • The need for a Standard Operating Guideline for minimum pump pressures

  11. Nozzle Reaction Nozzle Pressure 75 psi 67.5 lb/f 100 psi 79.2 lb/f 125 psi 88.5 lb/f 150 psi 97.2 lb/f Comparison of Reaction@ 150 GPM

  12. Nozzle Pressure, Reaction, & Flow Automatic Nozzles

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