There are several types of smoke and fire prevention valve types:
Frequently open smoke fire prevention valves, normally closed smoke fire prevention valves, remote control -type smoke fire prevention valve (steel rope control type), and automatic reset smoke fire prevention valve.
The functions of various smoke exhaust fire prevention valves are shown below:
1. The function of frequent opening smoke fire prevention valves:
1. Usually open state. When the fire occurs, after the control center outputs the DC24V power supply, the valve is automatically closed.
2. When the temperature of the pipeline reaches 280 ° C, the fuse is moved and the valve is automatically closed.
3. The output valve closed the signal, and the cigarette exhaust fan stopped.
4. Get off manually and turn on manually.
Second, the function of normal closed smoke fire prevention valve, also known as secondary action smoke fire prevention valve:
1. Usually in a normal closed state. When the fire occurs, the DC24V power supply is entered by the control center, and the valve is quickly turned on.
2. The output valve opens the signal, and the lock controls the fire to smoke.
3. Open manually and turn off manually.
4. When the pipeline temperature reaches 280 ° C, the fuse is moved and the valve is closed again.
Third, the function of remote control -type smoke and fire prevention valve (steel rope control type):
1. All functions of normal -closed smoke exhaust fire valve
2. Can be turned on and closer manually.
3. Steel rope control distance standard is 6m (ultra -long customable)
Fourth, automatic reset smoking fire prevention valve:
1. Usually in a state of constant closed state. When the fire occurs, the control center enters the DC24V power supply, and the valve is automatically turned on.
2. When the pipeline temperature reaches 280 ° C, the fuse is moved and the valve is automatically closed.
3. Can be opened manually.
4. After the valve is turned on, no manual reset is required. As long as you enter the DC24V power supply, the valve can automatically reset to the original shutdown position (this function is limited to the temperature sensor before the movement is not moved.Function).
5. The output valve opens the signal, and the lock controls the smoke exhaust fan start and stop.
6. If you use memory alloy temperature sensors, you can use it repeatedly without replacement.
The above is the introduction of the types and characteristics of smoking fire prevention valves. If you want to understand and learn more about related knowledge, please pay more attention to us ——