First, the primary material of the normally open smoke exhaust fire damper: carbon steel, galvanized sheet, stainless steel, installed on the smoke exhaust system pipeline, the usual situation is generally closed, manual or electric open in case of fire, play the role of smoke exhaust. When the flue gas temperature in the exhaust pipe reaches 280 ℃, it is closed, which can meet the requirements of fire stability and fire integrity within a certain period of time, and play the role of smoke exhaust valve.

Second, the primary function of the normally open smoke fire damper, features:
1. Input DC24V electrical signal, current ≤ 0.5A, electromagnet action, valve closes quickly, (electric smoke exhaust fire damper).
2. Manual shutdown, manual reset.
3, can output valve open signal and interlock control signal.

Three, often open type smoke fire damper strengths:
1, low air leakage, good airtight function..
2, electric open current consumption is small..
3, the actuator drive active, response, interlock signal accurate.
4, normally open type smoke fire valve anti-corrosion function is strong, the use of long life, (material for stainless steel type).
The linkage effect of fire damper and fire exhaust valve in fire fighting system.
At present, buildings and high-rise buildings have fire fighting, ventilation and air supply systems. What is not short of these systems is the fire damper equipment to be mentioned today. The fire damper installed on the fire smoke exhaust system is a smoke exhaust fire damper, and the fire damper installed on the ventilation system is an air volume regulating valve. Today, the small editor will give us a brief introduction to the linkage effect of the fire damper in the whole system.
1. Crossing the fire compartment.
2, through the ventilation, air dispatching room partition wall and floor.
3, through the important or fire risk room partition wall and floor.
4, through both sides of the deformation joint.
5. On the horizontal pipe section at the junction of the vertical air duct and the horizontal air duct of each layer, but when the ventilation and air dispatching systems of each fire compartment in the building are set independently, the fire damper may not be set at the junction of the horizontal air duct and the vertical main pipe in the fire compartment.
Fan: Pressurized fan, smoke exhaust fan and supplementary fan control cabinet shall have 24V start-stop contact and one-to-one response signal passive contact. Fan power supply has mutual investment function.
Fire damper: 70 ℃ fire damper and 280 ℃ fire damper shall have response signal contact.
Positive pressure air supply outlet: 280 ℃ fire prevention smoke exhaust valve shall have 24V coil contact and passive contact for response signal.
The control order of fire smoke exhaust is: any smoke prevention zone is on fire, all ventilation ventilators (low speed gear of smoke exhaust fan) operate continuously, the "smoke exhaust fire damper" responsible for the smoke prevention zone smoke exhaust system is opened and linked with the high temperature smoke exhaust fan of the smoke exhaust system and the high speed gear of the double speed smoke exhaust machine to initiate operation, and the "fire damper" of the air supply system in the fire prevention zone is opened and linked with the fan to initiate operation, when the exhaust temperature reaches 280 ℃.
1. Smoke exhaust and fire prevention series products shall not be stored in the open air. During transportation and storage, attention shall be paid to prevent rain and moisture from fire dampers to avoid damage and deformation.
2. After the smoke exhaust and fire prevention series products are used, they should be checked and protected regularly according to the relevant fire safety requirements to ensure safety. Generally, they should not be checked once every three months and should be recorded.
The main content of the regular view:.
(1) Turn on the power supply, check whether the electromagnet moves and whether the valve can be closed quickly. In the closed state of the valve, check whether the electromagnet moves sensitively and correctly, and check whether the valve blade is rolling sensitively and whether the valve is closed tightly.
(2) Check whether the micro switch is correctly connected.
(3) Check whether the function of the temperature fuse is reliable. When the fusible sheet is found to be disconnected, dropped or replaced regularly according to relevant fire protection procedures.
(4) Check the valve body, electrical wiring, control cable and operating equipment for damage and deformation.
(5) If the fire parts are found to be damaged or out of order during the inspection, they should be replaced immediately. After admitting that there is no fault, the valve can be reset.
Shandong Xingheng Environmental Technology Group Co., Ltd. is located in Luquantun Development Zone, Dezhou, Shandong Province, the hometown of glass fiber reinforced plastic in China. The company has three-level qualification for construction mechanical and electrical installation engineering, three-level qualification for environmental protection engineering, and safety production license. It is the first in the industry to pass ISO9001 quality management system certification, ISO14001 environmental management system certification, OHSAS18001 occupational health management system certification, an axial fan invention patent, a fan utility model patent, EIA, three at the same time waiting for complete procedures