In Air conditioning and Ventilation penetrations, the Bullock Model 4900 Curtain Fire Dampers are installed through fire rated walls or slabs.

model 4900 Fire Damper This model damper has been successfully tested for 4 hours in a masonry wall and concrete slab and 2 hours in a steel stud plasterboard wall, and is certified by the C.S.I.R.O. for these ratings, Model 4900 Curtain Fire Damper complies with AS1668.1-1998 and AS1682.1-1990.

Model 4900 Curtain Fire Damper Features

  • Australian certified to AS1530.4-1997 by the C.S.I.R.O. in:
  • i) Masonry walls for 4 hours. Test #-FS-1472, FSV-0094
  • ii) Concrete slabs for 4 hours. Test #-NF-08SV0343
  • iii) Steel Stud Plasterboard partition for 2 hours. Test #-FS-1495
  • All galvanised steel construction
  • Single (UL33 rated) fusible link
  • Readily available sizes:
    • wall type 100mm x 100mm up to 2400mm x 2400mm
    • slab type 150mm x 150mm up to 750mm x 750mm (contains 2 x 301 S/S conforce springs)
  • Optional TDF/TDC type flanges available for 1 x leakage/breakaway point
    Low melting point bolts to be used.)
  • Optional patented Bullock metal expansion gap seals available for a factory set 10mm expansion gap

    • Available in

    • Duct to Duct
    • Grille to Duct
    • Duct to Grille

    Openings in fire rated walls or slabs shall be protected by a Bullock Model 4900 Curtain Fire Damper or approved equivalent. Dampers shall be provided where shown on drawings and wherever required to meet local regulations and must comply with AS1682.1-1990 and AS1668.1-1998

    Dampers shall be installed in strict accordance with the manufacturer’s installation instructions, to comply with the certificates of test furnished by the manufacturer

    The damper’s construction must be in compliance with the tested prototype. The body being made with galvanised steel with any welds coated with cold zinc primer type paint to prevent rusting. The damper body must be strong and rigid to prevent operational damage during transport and/or installation on site.

    The damper’s expansion gap must be constantly maintained with the use of the patented Bullock Metal Expansion Gap Sealing System, complying with AS1682.2-1990 or and approved equivalent. Fusible link are to operate at 68°C or have an AS1890 rating.

    Maintenance – This model requires little maintenance once install. Refer to AS1851.6-1983 for detailed servicing procedures