A glass bulb is
the most reliable and simplest to use device to actuate
a fire sprinkler head. A chemical liquid sealed in the
glass bulb expands rapidly when exposed to rising temperatures,
bursting the bulb at an accurately pre-determined temperature,
thereby actuating the sprinkler.
Day-Impex manufactures a range of Glass bulbs for Fire
Sprinkler Heads and other temperature-actuated mechanisms,
such as fire dampers, smoke-vents, window-closers, etc.
With over 40 years experience in glass bulb technology,
a bulb for every design of head and for every fire-risk
application is available.
A range of sizes, with diameters from 12mm down to
2.5mm, is available in lengths to suit all sprinkler
frame designs, with aesthetically pleasing results.
Extensive research into formulating chemical liquids
with known, precise expansion rates, ensures that all
bulbs meet specific performance standards required by
Approval Authorities throughout the world.
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Precision
engineering and exhaustive quality control in
every stage of production ensures that the 3 most
critical bulb characteristics are achieved.
- Uniform and consistent size
- High mechanical strength
- Highly accurate operation temperature within
tight tolerances.
- Consistent RTI values
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The entire
manufacturing process carries certification to the Quality
Standards of ISO9001:2000, and all bulbs meet the
new European Standard, EN12259.
Day-Impex Glass Bulbs Types 937 and 941 carry UL Component
Recognition in various rated temperatures.
Day-Impex Glass Bulb Types 937, 941 and 817 carry LPCB
Product Approvals in various rated temperatures.
The trend to make sprinklers operate faster to suppress
fire and restrict spread, has seen Day-Impex develop
a progression of new glass bulb designs. Reducing the
bulb diameter, but maintaining strength, researching
and selecting faster-expanding liquids, has resulted
in new bulbs to meet every challenge including the Residential
and ESFR Standards of UL, FM, EUROPE and KOFEIS in Korea.
Below is a table showing the range of Day-Impex glass
bulb sizes, their operating temperatures and the most
widely used Standards met by each bulb.
Please download our latest technical specification sheets for our range of Sprinkler Bulbs by clicking the links below (all downloads are PDF format):
Type 817 Type 933 Type 937 Type 941
Type 942 Type 984 Type 989
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