Type K5.6 ½” Connection Thread
The FF023/FF024 Standard/Quick Response Upright and FF025/FF026 Standard/Quick Repose pendent sprinklers (Ref. Figure A)
are automatic sprinklers of the frangible bulb type. They are ‘‘standard/quick response – standard orifice spray sprinkler’’ intended for use in fire sprinkler systems designed in accordance with the standard installation rules recognized by the applicable Listing or Approval agency (e.g., UL Listing is based on NFPA 13 requirements). The Upright, Pendent Sprinklers all produce a hemispherical water distribution pattern below the deflector.
During a fire conditions, the thermal-sensitive liquid in the glass bulb expands, causing the bulb to shatter, releasing the button and spring seal assembly. Water flowing through the sprinkler strikes the sprinkler deflector forming a uniform spray pattern to extinguish or control the fire.
For coverage area and sprinkler placement refer to NFPA13 standards.