0.7A DC24V Fire Dampers For Ductwork 2mm 3mm Thickness
Fire hydrant
Application:
Used in through-wall pipes of ventilation system, which need to be fireproofing to prevent the spread of fire along the duct.
Mechanical dampers shut the cross sectional area of a duct in the event of a fire either by means of pivoting a fire-resistant board (in Europe), or by means of steel shutters, similar to blinds on a window (in North America). In the European designs, the turning mechanism is fully contained, permitting the dampers (subject to type approval) to be grouted in place, which permits a heat sink effect to conduct heat from an accidental building fire, which impinges upon a duct and damper, to be conducted into surrounding structures.
| 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 | ||
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