Electric Single Page Sealed Fire Damper
Electric Single Page Sealed Fire Damper is widely installed supply or return air ducts in ventilation and air conditioning system. It normally keep open, When the temperature of fire that pass through the damper reaches the fusible temperature setting, the blade spring will close automatic to block fire smoke and flame extending. After the damper acts, it will reset by manual. It can meet the requirements of fire stability and fire integrity in a certain period time. It is usually installed in the duct through the firewall. The main effect is preventing fire and smoke.
Overview
How to choose a fire damper
1. The main control parameters for selecting fire dampers are specifications, etc.
2. Fire dampers are suitable for ventilation and air conditioning systems. Except for fire dampers used in kitchen exhaust systems of public buildings with an operating temperature of 150 ℃, fire dampers used in general ventilation and air conditioning systems have an operating temperature of 70 ℃.
3. When selecting a valve, attention should be paid to its function, including whether it is normally open or normally closed, automatic closing and opening, manual closing and opening, manual reset, signal output, remote control, and other requirements.
4. If the valve is linked with the fan, a dual micro switch device should be selected.
5. The valve body blades should be made of steel plates with a thickness of 2-6mm. The valve body should be made of non combustible materials, and the rotating parts should be made of corrosion-resistant metal materials and rotate flexibly. The thickness of the valve casing shall not be less than 2mm. Easy to melt components should comply with the recognized standards of the fire department.
Drawing：
Basic paremeters：
| Size | Can be customized as request |
| Materia | Galvanized steel sheet |
| Temperature for damper closed | 70℃ |
| Operation | Close automatically |
| Reset | Manual |
| Refractory grade | 1.5h |
Air leakage | ≤500m3/m2•h |
| Control voltage | 24V DC |
| Action current | 0.3A |
| Mirco switch | 380V AC, 3A |
| Motion deflection distance | 10-70kg,f/cm |
