The material of fire fire and fire prevention valves in fire discharge is generally: carbon materials, galvanized plates, suitable for installation and air regulation systems of ventilation and air regulation systems. It is usually open.It can meet the requirements of smoking and refractory integrity in a certain period of time, and the effect of smoking fire blocking.
Working principle of fire valve:
In the air supply system, the air sent by the gauge must be distributed into the support through the main pipe; in the smoke exhaust system, the flue gas is discharged from the support of the support to the main pipe.When a fire occurs in the building, in the ventilation and air -conditioning system, in order to prevent the spread of the fire from spreading through the air supply system, when the gas temperature in the air supply system reaches 70 ° C, the fuse of the fire valve mechanism moves the movement, and the valve also quickly close the valve.Cut off the channels of flue gas and fire along the air.
Similarly, in the smoke discharge system, when a fire occurs, the smoke discharge valve is turned on and smoked.At 280 ° C, the fuse of the smoke and fire valve and the smoke discharge port movement, the valve must be automatically closed to prevent smoke.It can be seen that the fire prevention valve and the smoke discharge valve achieve the through.
In addition, the use of smoke discharge fire prevention valves:
(1) The valve is usually open. When the temperature of the air flow reaches 70 ° C, the temperature sensor movement, the valve is closed;
(2) Manually adjust the opening degree of the blades in the range of 0 ° ～ 90 °;
(3) Manually close or manually reset;
(4) The output valve closes the signal and is locked with other fire prevention equipment.
The smoke -proof fire prevention valve is usually installed on a ventilatory air duct that needs to adjust the air volume or the electrical signal control valve is turned off.Suitable for horizontal or vertical air ducts.
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