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Round Fire Damper

Round Fire Damper

Round Fire Damper

Product Details:

Place of Origin: TIANJIN CHINA
Brand Name: BELL
Certification: ISO9001 CE
Model Number: FH-T

Payment & Shipping Terms:

Minimum Order Quantity: 10 sets
Price: USD 50 -580 set
Packaging Details: carton box
Delivery Time: 7-20 days
Payment Terms: T/T, L/C ,Paypal ,Western Union
Supply Ability: 1000 sets per week
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Detailed Product Description
Material: Galvanized Steel Sheet, Stainless Steel Sheet Size: Customized
Control: Mechanical Action Operation Temperature: 70℃
Fire Resistance rating: 1.5h Normal: Open
Operation: Close Automatically


The 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.


Product Principle:

The fire damper is installed the central conditioning duct system. Its working principle is control the temperature of fusible alloy. The damper will be closed by the effect of gravity and spring. When it is fire, flame go into the ducts with the high temperature make the fusible alloy in the damper melting or make the memory alloy produces deformation to close the damper automatically. This series of damper is widely used in the places of air ducts with cross fire zone.


Fire damper Setting Position:
Fire damper is set on the ventilation and air conditioning system, smoke extraction fire damper is set on the smoke exhaust system duct. This way can prevent high temperature toxic gas from transporting when the fire.

There should be set the fire damper in the following conditions:

1. The ducts through the fire zone.
2. The ducts through ventilation, air conditioning computers rooms
3. The connected junction layer duct of vertical horizontal section duct and level duct.
4. Both sides of the duct crossing deformation cracks.


Technical Specifications:

Product Round fire damper
Size Can be customized as request.
Material Galvanized steel sheet
Damper closed temperature 70℃
Normal state Open
Operation Close automatically
Reset Manual
Fire resistance rating 1.5 hour
Air leakage <500m3/ m2 ‧ h
Resistance coefficient when fully open <0.5


Contact Details
Tianjin Bell Automatic Instrument Technology Co., Ltd

Contact Person: Manager

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