Tobacco -fire prevention valve is set to open or closed normally. It is necessary to determine according to the form of the tobacco outlet. When the normally closed smoke exhaust port is set, the smoke discharge fire prevention valve is provided on the tobacco support pipe.When a normal open air outlet is set up, the smoke -exhaust support should be set on a tenth to smoke fire prevention valve.When there is a special -closed special fire fire exhaust port, no smoke exhaust fire valve should be provided on the smoke discharge support.The basement of the mechanical smoke should consider the facilities of the air inlet. When the mechanical entry system is adopted, a 70 ° C fractive valve should be set on the entrance pipe.For the pressure supply system of the mechanical pressure, a 70 ° C fractive fire valve can be set on the pipeline of the pressure delivery entrance to prevent the fresh air inlet from being threatened by fire and smoke, and the flue gas is transported to the floor.On the general management of the smoke entrance, when the temperature of the flue gas exceeds 280 ° C, the smoke exhaust fire valve can be automatically closed, and it should be connected to the smoke discharge. When the smoke exhaust fire valve is closed, it stops operation.It should be guaranteed to work continuously for 30 minutes at 280 ° C.It should be noted that the smoke discharge fire prevention valve is set to be flexibly 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 discharge through the vertical wind ducts to the outdoor, the fire prevention valve should be set on the general management of the smoke entrance.When the number of local underground rooms is above the second and second floors, when each layer shares a row of tobacco vertical wells, the smoke and fire prevention valve on each layer shall be set on the tube of the smoke outlet, that is, it is set up on the side of the smoke vertical well.Whether it is a vertical -oriented smoke exhaust system or a horizontal furnishing room smoke exhaust system, when the smoke discharge branch tube is set to 280 ° C, the smoke exhaust fire prevention valve can be automatically closed.
The above is the application of the smoke discharge fire prevention valve in daily life