The setting of the smoke and fire valve depends on the form of the smoke outlet.When setting up the normally closed tobacco outlet, the smoke discharge fire prevention valve is set on the tobacco branch pipe.When setting up ordinary air outlets, set up normally closed smoke fire prevention valves on the smoke discharge support.When setting up a special fire fire exhaust port, there is no smoke and fire prevention valve on the smoke pipe.The basement of mechanical smoke should be considered.When using a mechanical air -proof system, a 70 ° C fractive fire valve should be set on the fan entry pipe.
For the pressure supply system, the fire prevention valve of 70 ° C melting can be set on the pipeline of the pressure supply dealer to prevent the fresh air entrance from being threatened by fire and smoke, and the fog is transported to the floor.The smoke exhaust fire prevention valve that can be automatically closed when the temperature of the smoke gas exceeds 280 ° C should be equipped with a smoke exhaust fan chain when the flue gas temperature exceeds 280 ° C.When the smoke discharge fire prevention valve is closed, the fan stops running.
It should be noted that the smoke discharge fire prevention valve should be determined flexibly according to the specific situation before and after the smoke exhaust fan.Take the basement smoke exhaust system as an example.There is only one layer of the local underground room. When the smoke is discharged to the outdoor through the vertical air duct, the smoke fire prevention valve should be set on the general pipe of the smoke exhaust fan entrance.The number of local underground rooms is more than two layers. When each layer shares a row of tobacco wells, each smoke discharge valve should be set on the general pipe of the smoke exhaust fan export, that is, the side of the tobacco discharge well.
Whether it is a vertical layout smoke discharge system or a horizontal room smoke drainage system, the smoke discharging tube and vertical air duct should be automatically closed at 280 ° C.Tobacco -fire prevention valve is often opened or closed.For the smoke exhaust system in the room, when there are multiple smoke -proof partitions with a smoke discharge pipeline that bear a fireproof partition, you should set up a frequent smoke exhaust fire valve on the fireproof partition supervisor.Set up the normally closed smoke outlet or smoke exhaust valve.
The above is an introduction to the smoke discharge fire prevention valve