Fire Damper
Features
1. Using galvanized steel as material to make sure good insulation performance, fire & corrosion resistance.
2. Duration, long service life.
3. Easy installation.
4. The flange is bended directly by the frame.
5. The valve size and color can be customized according to customer's requirements.
Fire dampers are passive fire protection products used in heating, ventilation, and air conditioning (HVAC) ducts to prevent the spread of fire inside the ductwork through fire-resistance rated walls and floors. Fire/smoke dampers are similar to fire dampers in fire resistance rating, and also prevent the spread of smoke inside the ducts. When a rise in temperature occurs, the fire damper closes, usually activated by a thermal element which melts at temperatures higher than ambient but low enough to indicate the presence of a fire, allowing springs to close the damper blades. Fire dampers can also close following receipt of an electrical signal from a fire alarm system utilising detectors remote from the damper, indicating the sensing of heat or smoke in the building occupied spaces or in the HVAC duct system.
| Fire damper performance parameter table |
| Serial number | name | performance parameters |
| 1 | Standard flange specifications | Valve long side b or diameter D (mm) | Flange side width (mm) |
| D≤280 | 20 |
| 280≤D≤630,b≤630 | 25 |
| 630＜D1250,630＜b≤1250 | 30 |
| 1250＜D≤2000,1500＜b≤2500 | 40 |
| D＞2000,2500＜b≤4000 | 50 |
| 2 | Temperature sensor | valve static nominal operating temperature 70℃ (valve closes automatically) |
| 3 | Material | Valve body | 2~3mmQ235-A |
| Bles | 2mm708-88 Cold rolled plate |
| Axshaft | GB905-82 Cold pull round steel Ф12 |
| Axft sleeve | Oil-containing metallurgical powder copper sleeve |
| 4 | Local resistance coefficient | Resistance coefficient of ≤ 0.5 at full opening |
| 5 | Paint treatment | Ground floor rust proof primer (second floor), outer fire proof paint (medium ash steel paint) |
| 6 | Rated voltage | DC24V±10% |
| Rated current | 0.7A |
| Micro switch | AC380V,3A |
| Torque | 10~70Kg.f/cm |
| Action mode | automatic, electric, manual or 70℃ to close the valve |
| 7 | Fire control valve | Reset method (open state) | Manual reset |
| Smoke and fire control valve | Manual reset |
| Smoke and fire damper | Manual reset |
| Remote control smoke and fire damper | Remote control manual reset |
| Automatic reset fire damper | Electric reset |
| 8 | Air leakage | In the standard state, when the pressure difference on both sides of the valve is 500Pa after the valve is closed, no more than 700mm³/㎡/h |
