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The difference between 70 ° C firvalvand 280 ° C firlve

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Update time : 2024-06-30

Why is the central fire prevention valve divided into 70 ° C and 280 ° C?Why is there two states: frequent and normally closed in 280 ° C?
To understand the above problems, we must first know what the air supply pipelines are and what are the pipelines of the exhaust wind.
Volticism pipe: air supply pipeline and air -conditioning system in the ventilation system.
Exhaust pipeline: exhaust pipes in the ventilation system and smoke exhaust pipes in the anti -smoke anti -exhaust system.
So, the fire valve of 70 ° C is installed in the air supply pipeline. It is a normal state. When a fire occurs, the fire valve will be closed. Imagine the fire.The larger, the larger, and the 70 ° C is a relatively reasonable test specified value. If it is too low, it is possible to close it by mistake, and too high may increase the fire.
The fire valve of 280 ° C is installed in the exhaust pipe, but why are there two states: frequent and normally closed?
Imagine that if the above pipeline is set separately, the volume of the air duct is already large, and there is a cross overlap, then it should be imagined what it will be, and sometimes you have to reduce the ceiling. ThereforeThe system shares the air supply pipeline; and the smoke discharge system that affects the safety of public property can share the exhaust pipeline with the ventilation system under the condition of allowable conditions.
Then, when the smoke exhaust pipes of the tobacco discharge system are separated from the ventilation pipeline of the ventilation system: the fire valve of 280 ° C is installed in the smoke exhaust pipes, and it is a normal closed state.The exhaust pipeline is installed with a 70 ° C regular fire valve. Usually discharge indoor exhaust gas. If a fire occurs, the fire valve at 70 ° C is closed, and the linked exhaust fan is stopped.Open manually), and start working to start a smoke exhaust fan.
When the smoke exhaust system is shared with the ventilation system, the pipeline of each indoor exhaust port is installed at 280 ° C.
The above is the difference between the fire valve of 70 ° C and the fire valve of 280 ° C. For more relevant information, please follow us —

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