Model 4900 @ Bullock Mfg Pty Ltd

The Bullock Model 4900 Curtain Type Fire Dampers are installed to protect airconditioning and ventilation penetrations though fire rated walls or slabs.
This Model Damper has been tested for 4 hours in a masonry wall and concrete slab and 2 hours in a steel stud plasterboard wall. Certified by the CSIRO for these ratings, this model complies with AS1668.1-1998 and AS1682.1-1990.
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Australian certified to AS1534.4 - 1997 by the C.S.I.R.O. in:
    a) Masonry walls for 4 hours. Test #- FS-1472, FSV-0094
    b) Concrete slabs for 4 hours. Test #- NF-08SV0343.
    c) 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 750 mm.
Optional TDF/TDC type flanges available for 1 x leakage/breakaway point
   (Low melting point bolts to be used).
Optional Metal Expansion Gap Seals available for a factory set expansion gap.
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Order should read as follows:
Width (blade length) x Height x Wall thickness. Minimum wall thickness 110mm.

Flange Sizes are as follows:
Sizes under 1200 x 1200 = 30mm
Sizes over 1200 x 1200 = 50mm

Order should read as follows:
Width (blade length) x Height x Wall thickness x Depth of recess for grille x Flange. Minimum wall thickness 130mm.

Minimum flange size "T"
(max W or H / 100) + 10.
Refer AS 1682.2-1990. Appendix C.

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Order should read as follows:
Width (blade length) x Height x Wall thickness x Depth of recess for grille x Flange. Minimum wall thickness 110mm.

Minimum flange size "T"
(max W or H / 100) + 10.
Refer AS 1682.2-1990. Appendix C.

Openings in fire rated walls or slabs shall be protected by a Bullock Model 4900 curtain type 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 dampers expansion gap must be constantly maintained with the use of Bullock Manufacturing's metal expansion gap sealing system, complying with AS1682.2-1990 or an approved equivalent. Fusible links are to operate at 68^oC having a UL33 rating or AS1890 rating.

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Compliance with installation instructions is critical. Refer to separate wall/slab type installation instructions to suit your requirements. Please refer to installation Page.

Optional metal expansion gap seals are also available on model 4900 Bullock Fire Damper. Metal seals allow the damper to be installed insitu with a controlled expansion gap (AS1682.2-1990). This means no installation or inspection costs plus the elimination of health hazardous fibers.
(Aust Patent #-624288)

No Installation costs.
No hazardous fibers.
Factory set expansion gap.
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Specifications subject to change without notice.

This model requires little maintenance once installed. Refer to AS1851.6-1997 for detailed servicing procedures.