Aluminum alloy return air outlet
Detailed introduction:
[Main uses of aluminium alloy return air outlet]
Aluminum alloy return air outlet is used in the supply and return air pipeline of ventilation and air conditioning system. It is usually open. When fire occurs, the gas temperature in the pipeline will close automatically when it reaches 70 C. It can meet the requirements of fire resistance stability and fire integrity within a certain period of time, and play the role of smoke insulation and fire resistance.
The smoke exhaust valve is used in the smoke exhaust system pipeline or at the suction entrance of the smoke exhaust fan. It is usually closed. When a fire occurs, the valve is opened manually or automatically through the fire alarm signal. According to the function of the system, the smoke exhaust valve is automatically closed when the temperature of smoke in the pipeline reaches 280 C, and it can meet the fire resistance stability in a certain period of time. Property and fire-resistance integrity requirements, play a smoke-proof and fire-retardant role.
[Details]
Fire valve
1. Fire-proof valves and fire-proof regulating valves are normally opened and closed at 70 degrees. They are usually installed in the air duct through the firewall to shut off fire. They can set up output signals. When smoke sensation exceeds 70 degrees, the valves are closed and the interlocking supply (supplement) fans are closed.
2. Smoke-proof and fire-proof regulator, normally open, 70 degrees closed, the same as 1, but with an additional signal input, it can be closed by remote control of the control room. It is generally used in the common air duct system of normal air supply and fire air supply. When a fire occurs, it can be controlled to close the room without air supply.
3. Fire valve, 280 degree fuse closed, often open, output signal, this is similar to 1, but the fuse temperature is different, generally used in the fire exhaust pipe through the firewall, when the smoke temperature exceeds 280 degree, automatic fuse closed, can interlock closed smoke exhaust fan.
Smoke exhaust valve:
1. Smoke exhaust fire valve (normally closed, telecommunication signal open, 280 degree fuse closed, or manual closed) is generally used in the smoke exhaust system. It can be installed at the suction port of the exhaust fan. It can be opened by the fire control room when the fire occurs, and the exhaust fan can be closed interlock when it is closed.
2. Smoke exhaust valve is different from the above-mentioned 3. Some units are called smoke exhaust valve according to its operating temperature and others are called fire-proof valve according to its use nature. However, for the equipment side, the fuse metal of ordinary fire-proof valve is replaced by the one of 280 degrees fuse.
3. Fully automatic smoke exhaust and fire protection valves (for Metro engineering) have the functions of linkage control with automatic fire alarm equipment and gas fire extinguishing system in underground railway ventilation, fire prevention of air conditioning system and smoke exhaust valves. Each automatic smoke-proof and fire-proof valve has two independent electric control signals, which are monitored by EMCS and gas elimination system respectively. The control signals are DC24V + 10%. Each automatic smoke control and fire protection valve has six independent feedback signals (three open and three closed) which are always open passive contact signals.
Smoke outlet:
If you install the necessary smoke exhaust valve in the pipeline, you can use the ordinary single-layer shutter vent; otherwise you need the plate vent, which also has the smoke exhaust fire valve mechanism.