Multiplied action mechanisms with thermal glass bulbs, for application in smoke outlets

Made of 3mm thick galvanized steel, these reduction mechanisms are compatible with 20x5mm thermal glass bulbs. Their huge multiplying coefficient reduces the force applied to the thermal glass bulb to only 15% of that applied to the mechanism. The replacement of the glass bulb is simple and can be done without special tools. They withstand the 300 DaN overload during 5 minutes, and a minimal load of 0.4 DaN.

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Description

Made of 3mm thick galvanized steel, these reduction mechanisms are compatible with 20x5mm thermal glass bulbs. Their huge multiplying coefficient reduces the force applied to the thermal glass bulb to only 15% of that applied to the mechanism. The replacement of the glass bulb is simple and can be done without special tools.

They withstand the 300 DaN overload during 5 minutes, and a minimal load of 0.4 DaN.

 

Material: Zinc plated steel.

  • On two steel cables equipped with rope
  • On a steel cable equipped with rope thimble in the 6.2mm hole and a wall mounting bracket in the 8.2mm hole. These accessories are described at the end of this

ROHS compliance: These mechanisms are fully ROHS compliant.

Identification: Model and date of manufacture are stamped on each mechanism. When equipped with a thermal glass bulb, temperature set point is given by the glass bulb color.

Tests:

  • Mechanical resistance at ambient temperature with a 300DaN overload during 5 minutes: checked by statistical sampling in production.
  • Triggering in temperature under minimum load of 0.4 DaN: checked by statistical sampling in

Salt spray resistance: According to ISO9227-2012, subjected to a mist formed of 20% by weight of sodium chloride in distilled water, at 35°C for 5 days (120h), the mechanism retains its aptitude for the function.

Options : 304 Stainless steel models.

 

Main references

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Technical informations associated to this product

  • Historical and technical introduction of fusible alloys and fire safety fusible links

    The earliest known piece made of lead and tin alloy seems to be an Egyptian vase found in Abydos, dated around 1400 BC. During the Roman Empire, lead was used for the construction of water pipes. Melting at 325°C,
  • Historical introduction to temperature measurement

    The temperature measurement was preceded by a long period, throughout the 18th century, when first empirically and then gradually more accurately, have been developed measurement scales, were discovered fixed points for the calibration of these scales, and all physical variations related to temperature change: thermal expansion of gases, liquids, metals and other solids, liquefaction temperatures, boiling temperature, magnetism, thermoelectricity, just to give a few.
  • Temperature sensing principles

    The bimetal strip is formed by two co-laminated metal. One has a high coefficient of expansion, the othera lower or zero. When the strip is heated, it bends proportionally to the temperature. These bimetal blades are generally flat and fixed at one end. But they can be wound in a spiral shape, although this arrangement most often used in the construction of thermometers.