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Fire-resistant and smoke-exhaust valves include: fire dampers, smoke exhaust fire dampers, and smoke exhaust valves. Fire dampers are installed on the supply and return air ducts of ventilation and air conditioning systems. They are normally open, but close when the smoke temperature inside the duct reaches 70°C during a fire. They must meet the requirements for smoke leakage and fire resistance integrity for a certain period of time, thus serving as a smoke and fire barrier. Smoke exhaust fire dampers are installed on the ducts of mechanical smoke exhaust systems. They are normally open, but close when the smoke temperature inside the duct reaches 280°C during a fire. They must meet the requirements for smoke leakage and fire resistance integrity for a certain period of time, thus serving as a smoke and fire barrier. Smoke exhaust valves are installed on the ducts of mechanical smoke exhaust systems. They are normally closed, but open during a fire to exhaust high-temperature smoke from the duct.
Fire-resistant smoke exhaust valves mainly consist of components such as valve body, blades, actuator, and temperature sensor. The valve body comprises a shell, flange, blades, and blade linkage mechanism. The actuator comprises a housing, blade adjusting mechanism, clutch, and temperature fuse.
| category | name | Function | Remark | |
| Fireproof | Simple fire damper | Normally open; the fuse trips at 70℃, automatically closing the valve; manually reset. | Non-alarm system control | Use less |
| Fire damper | Normally open, the fuse trips at 70℃, the valve automatically closes and outputs a closing signal, and can be manually reset. | 70℃ fire damper | Commonly used | |
| Electric fire damper | Normally open, the valve automatically closes and outputs a shutdown signal when powered by DC24V. It can also be manually closed and manually reset. | Electric fire damper (electrically shut-off) | Commonly used | |
| Electric fire damper | Normally open, the valve automatically closes and outputs a closing signal when powered by DC24V. It can also be manually closed, shut off by a 70℃ fuse, and manually reset. | 70℃ fire damper + electric fire damper (electrically shut-off) | Use less | |
| Electric fire damper (fully automatic) | Normally open, the valve automatically closes and outputs a closing signal when powered by DC24V. It can also be manually closed, shut off by a 70℃ fuse, and reset by DC motor drive. | As above, remote reset is possible. | Rarely used | |
| Pneumatic fire damper | Normally, the valve is open when powered by 24V. It automatically closes and outputs a closing signal when the power or gas supply is cut off. It can also be closed remotely via pneumatic operation by using a 70℃ fuse. | Industrial | Need not | |
| Smoke exhaust | Smoke exhaust fire damper | Normally open, the fuse trips at 280℃, the valve automatically closes and outputs a closing signal, and can be manually reset. | 280℃ fire damper | Commonly used |
| Smoke exhaust fire damper | Normally open, the fuse trips at 280℃, the valve automatically closes and outputs a closing signal and a linkage signal, and can be manually reset. | 280℃ fire damper connected to fan | Commonly used | |
| Electric fire damper | Normally open, the valve automatically closes and outputs a shutdown signal when powered by DC24V. It can also be manually closed and manually reset. | Electric fire damper (electrically shut-off) | Commonly used | |
| Smoke exhaust valve | Normally open, the valve automatically closes and outputs a closing signal when powered by DC24V. It can be manually closed, closed by a 280°C fuse, and manually reset. | 280℃ fire damper + electric fire damper (electrically shut-off) | Use less | |
| Smoke exhaust valve | Normally open, the valve automatically closes and outputs a closing signal when powered by DC24V. It can also be manually closed, closed by a 280°C fuse, and reset by DC motor drive. | As above, remote reset is possible. | Rarely used | |
| Smoke exhaust valve | Normally closed, the valve automatically opens and outputs an open signal when powered by a DC24V input. It can also be manually opened and manually reset. | Electric fire damper (electrically opened) | Commonly used | |
| Smoke exhaust valve (fully automatic) | Normally closed, the valve automatically opens and outputs an open signal when powered by a DC 24V input. It can also be opened manually and reset by a DC motor drive. | As above, remote reset is possible. | Rarely used | |
| Smoke exhaust valve | Normally closed, the valve automatically opens and outputs an open signal when powered by a DC24V input. It can also be manually opened and closed at 280°C, and can be manually reset. | 280℃ fire damper + electric fire damper (electrically openable) | Use less | |
| Smoke exhaust valve (fully automatic) | Normally closed, the valve automatically opens and outputs an opening signal when powered by a DC24V input. It can also be opened manually and closes again at 280°C, driven by a DC motor for reset. | As above, remote reset is possible. | Rarely used | |
| Smoke vent | Normally closed, the valve automatically opens and outputs an opening signal when powered by DC24V. It can also be opened and reset manually. | Smoke vent | Commonly used | |
| Smoke exhaust vent (fully automatic) | Normally closed, the valve automatically opens and outputs an opening signal when powered by a 24V DC power supply. It can also be opened manually, and is reset by DC motor drive. | Remote reset is possible as described above. | Rarely used | |
| Smoke vent | Normally closed, the valve automatically opens and outputs an opening signal when powered by DC24V. It can also be opened manually and closed again at 280°C. Manual reset is required. | 280°C Fire Damper – Electric Fire Damper (Electric Closure) | Rarely used | |
| Electric fire damper | When powered by AC220V, the valve and fan are interlocked, automatically opening and closing and outputting open and close signals. | Electric fire damper (electric opening and closing) | Commonly used |
