Xiao Bian also stressed the importance of equipment for a product before. Some small partners have achieved good work efficiency through correct equipment. Some small partners do not attach importance to these and the product will not operate normally before long. Therefore, the equipment is really very important. This issue will explain to us: What is the demand for the equipment quality of smoke exhaust fire damper.

1. Salt spray test.
The specimen in the salt spray box valve spray salt spray test, the specimen should be able to be reliably closed from the open position, in order to check the valve in the actual engineering corrosion resistance.
2. Temperature sensor action function experiment.
For the smoke exhaust fire damper and the temperature sensing element of the smoke exhaust valve, separate from the regular temperature of the constant temperature water bath and oil bath, and check whether it can be closed according to the required temperature through non-action and action experiments.
3. Closed reliability experiment.
After 250 sealing operations on the test bench, the test piece shall be able to be reliably closed from the open position, and each component shall be free of obvious wear, deformation and damage affecting its sealing function.
4. Under the condition of regular pressure difference before and after the air leakage test body, the air leakage volume of the fire damper per unit surface of the test piece is less than 700Nm 3/. This is used to check the sealing function of the valve after closing.
Smoke fire damper is mainly used for ventilation, air conditioning system of the duct, usually in the "normally open" state, when the air temperature reaches ~ zJ70oc, through the valve fuse action and active closure.
The smoke exhaust fire damper is mainly set on the pipeline of the smoke exhaust system, or installed at the suction entrance of the fire exhaust fan, which is usually in a closed state. When a fire occurs, the smoke exhaust valve is actively opened through linkage. The fire damper is installed at the entrance of the fan used for both the smoke exhaust system and the ventilation and air conditioning system, which is usually in a "normally open" state and can be ventilated. When the airflow temperature in the pipe reaches N280oC, the valve is actively closed by the action of the fusible metal temperature fuse to cut off the airflow and avoid the spread of fire.

In practice, it is found that the following factors are considered in the demand of smoke exhaust fire damper:
1. Smoke fire damper selection of primary control parameters for the standard.
2. The smoke exhaust fire damper is used at the end of the ventilation and air conditioning system. Its operating temperature is 70 ℃. In case of fire, the fire source should be separated from the air outlet.
Fire damper.
3. If the linkage with the fan should be selected with double micro switch device.
4. The tuyere shall be made of non-combustible materials. The rolling parts shall be made of corrosion-resistant metal materials and shall be flexible in rolling. The thickness of the shell shall not be less than 2mm. The melting parts shall meet the approval standards of the fire department.
Smoke fire dampers are normally open or normally closed, depending on the method of smoke exhaust. When a normally closed smoke exhaust port is provided, a normally open smoke exhaust fire damper is provided on the smoke exhaust branch pipe. When a normally open tuyere is provided, a normally closed smoke exhaust fire damper is provided on the smoke exhaust branch pipe. When a normally closed special fire exhaust port is provided, no smoke exhaust fire damper is provided on the smoke exhaust branch pipe. Air inlet equipment should be considered in the basement where a mechanical air inlet system is provided, and a 70 ℃ fire damper should be provided on the fuse inlet pipe.
Regarding the mechanical pressurized air supply system, a 70 ℃ fused fire damper can be set on the inlet pipe of the pressurized air supply fan to prevent the fresh air inlet from being caught by fire and smoke, and to deliver the smoke to the floor. A smoke exhaust fire damper that can be actively closed when the smoke temperature exceeds 280 ℃ shall be set on the inlet main pipe of the smoke exhaust fan, and shall be interlocked with the smoke exhaust air fire damper. When the smoke exhaust fire damper is closed, the fan will operate intermittently.
The smoke exhaust fan should ensure that it can operate continuously for 30min at 280 ℃. the requirement is that the smoke exhaust fire damper is set in front of and after the smoke exhaust fan. it should be sensitively determined according to the specific situation. take the basement smoke exhaust system as an example. When the basement is only one floor, and the smoke is discharged to the outside through the vertical air duct, the smoke exhaust fire damper should be set on the inlet manifold of the smoke exhaust fan. When the basement floor is on the second floor and above, and each floor shares a smoke exhaust shaft, the smoke exhaust fire damper of each floor should be set on the outlet manifold of the smoke exhaust fan, which is close to the side of the smoke exhaust shaft.
No matter whether the vertical settling aisle smoke exhaust system is still the horizontal settling room smoke exhaust system, the smoke exhaust fire damper that can be actively closed at 280 ℃ shall be set at the junction between the smoke exhaust branch pipe and the vertical air duct, and the smoke exhaust fire damper shall be normally open or normally closed. As for the room smoke exhaust system, when the smoke exhaust pipe of one fire partition is responsible for the smoke exhaust ports of multiple smoke control partitions, the fire exhaust valve shall be normally open on the fire partition main pipe, A normally closed smoke exhaust port or smoke exhaust valve is set on the branch pipe of each smoke prevention partition.
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