The fire smoke damper (function: control the flow of smoke in the pipe during a fire) should be normally open or normally closed, depending on the type of smoke exhaust. The low-noise fan is a machine that can quickly exhaust the peculiar smell, high temperature and oily fume generated during the food processing process in the kitchen. This machine has the characteristics of good high temperature resistance and high efficiency. When setting up a normally closed smoke outlet, set a normally open fire smoke damper on the exhaust branch pipe. When setting a normally open air outlet, set a normally closed fire smoke damper on the smoke exhaust branch pipe. When a normally closed special fire-fighting exhaust outlet is set, there is no anti-fume exhaust valve on the exhaust branch pipe. In the basement with mechanical smoke exhaust, air inlet facilities should be considered. When a mechanical air intake system (system) is used, a 70℃ fusing fire damper should be installed on the air inlet pipe of the fan.
For mechanical pressurized air supply systems, a 70°C fuse fire damper (function: control the flow of smoke in the pipe during a fire) can be installed on the air inlet pipe of the pressurized blower to prevent the fresh air inlet from being threatened by fire and smoke, and send the flue gas to the floor. The main control parameters of the centrifugal fan housing are working temperature, air volume, total pressure, efficiency, noise, motor power, speed and shaft power. Features: The inlet main pipe of the high-temperature resistant and high-efficiency box should be equipped with a smoke-proof and fire-proof valve, which automatically shuts off when the flue gas temperature exceeds 280°C, and is interlocked with the smoke exhaust box. When the fire smoke damper actuator is closed, the fan will stop running.
The exhaust fan housing should be able to work continuously at 280°C for 30 minutes. It should be noted that there are anti-smoke valves (function: control the flow of smoke in the pipe during a fire) on the front and back of the smoke exhaust fan casing, which should be flexibly determined according to the specific situation. Take the basement smoke exhaust system as an example. When there is only one floor in the basement, when the flue gas is discharged to the outdoors through the vertical duct, a fire smoke damper actuator shall be installed on the main pipe at the entrance of the smoke exhaust fan shell. When the number of basement floors is two or more, and each floor shares a smoke shaft, set the fire smoke damper on each floor on the exhaust main pipe of the smoke exhaust fan housing, that is, near the smoke shaft side.
Whether it is a vertical aisle smoke exhaust system or a horizontal room smoke exhaust system, a fire smoke damper that can automatically close at a temperature of 280°C is set at the junction of the smoke exhaust branch pipe and the vertical air duct. Soloon fire smoke damper can work continuously for 30 minutes when the conveying medium temperature is 280℃, and it can still work normally when the medium temperature is cooled to the ambient temperature. fire smoke damper should be set to normally open or normally closed. For the room smoke exhaust system, when the smoke exhaust pipe of a fire compartment is equipped with multiple smoke outlets of the fire compartment, a normally open fire smoke damper is installed on the main pipe of the fire compartment, and a normal fire smoke damper is installed on the branch pipe of each fire compartment, and a normally closed smoke exhaust port or exhaust valve on the branch pipe of each fire compartment is set.