The invention relates to a pneumatic quick-open air door cover which comprises a door cover body (1), a back plate (3) and two side plates (4), wherein the door cover body (1), the back plate (3) and the two side plates (4) form a trapezoidal cavity; the cavity is filled with a fireproof lining (2) which is made of ceramic fiber cotton. According to the pneumatic quick-open air door cover, the trapezoidal cavity is defined by the door cover body (1), the back plate (3) and the two side plates (4), so that the air door has good sealing property when being closed; meanwhile, the cavity is filled with the fireproof lining, so that the thermal insulation effect of the door cover is good, the heat loss of the heating furnace is small and the thermal efficiency is high.
As an emergency equipment, fans normal operation, fast throttle opening to be sealed in good condition, the fan failure is quickly opened for natural ventilation.Thus, good sealing performance and reliable quick-opening throttle opening is the basic requirement.
INSTALLATION OF DAMPERS
1.When lifting or handling the fire damper, care must be taken to protect the mechanism from damage. DO NOT LIFT THE FIRE DAMPER BY THE ACTIVATING MECHANISM.
2.After installation it is also advisable to protect the mechanism from dirt and mechanical damage, until the commissioning and/or final acceptance activities start (for instance: a wooden covering box).
3.The fire damper can be installed in a horizontal, vertical or inclined position. However, it is recommended to provide the blade spindle to remain in the horizontal plane.
4.In case of passing through decks or bulkheads, the fire damper shall be flanged on a separate penetration sleeve. These sleeves are mostly manufactured out of the same material and fire rating as the deck or bulkhead in which they are located, and provided with corresponding counter flanges. A suitable gasket if needed must be included between the flange faces to seal the joint.
5.The fire damper must be installed square and true. Any distortion of the casing may cause jamming during operation.
6.If the fire damper has to be insulated after installation (pending on the fire rating) ensure that the insulation does not impede the operation of the damper.
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