Installed on the ventilation and air -conditioning system, it is usually open. When the gas temperature in the pipeline reaches 70 ° C during the fire, it is easy to melt the film.Refracting stability and refractory integrity requirements, valve valves to smoke fire blocking.When the valve is closed, the output is closed.Smoke -proof fire prevention valve
Frequent opening, closed 70 degrees, the same 1, but one more telecommunications input, which can be remotely controlled by the secreting room. Generally, it is used in the usual air supply and fire -replenishment of wind duct system. It can be controlled during fire.Room; Frequently open smoke fire prevention valve
280 degrees fuse off, often open, output telecommunications signal, which is similar to 1, but the fuse temperature is different. It is generally used in the fire tube of fire to cross the firewall. When the temperature of the flue gas exceeds 280 degrees, it is automatically fused and closed.Fan.The smoke exhaust valve is installed on the smoke exhaust system pipeline. It usually is generally closed. Manual or electric turn on the fire to turn on the smoke.When the temperature of the smoke gas in the smoke exhaust pipes reaches 280 ° C, it can meet the fire resistance stability and refractory integrity requirements in a certain period of time.Convention -type smoking fire prevention valve
(Normally closed, the power signal is turned on, the 280 -degree melting is closed, or the manual is closed.) It is generally used in the smoke exhaust system, which can be installed in the smoke exhaust ventilator.Exhaust fan.Smoking valve
With the above 3, each unit is different. Some are called smoke exhaust valves according to its action temperature.The one.
The fire prevention and smoke discharge valves of the underground railway have the functions of linked control with the automatic alarm equipment and the gas fire extinguishing system.There are two independent electric control signals for each automatic smoke prevention and fire prevention valve, which are monitored by EMCS and Qi Calcation systems, and the control signal is DC24V ± 10%signal.There are six independent feedback signals in each automatic smoke prevention and fire prevention valve (three opens in place, and three levels in place) feedback signals.If you install the necessary smoke exhaust valves on the pipeline, you can use the ordinary single -layer shutter air outlet; otherwise, you need to use a plate -type tobacco outlet, which has a institution with a smoke discharge fire valve at the same time.