Round Manual Fire Damper:

China Round Manual Fire Damper:

Fire damper is installed on the ventilation duct with fire requirement, used to prevent the fire from spreading. When on fire, the temperature in the duct reaches 70℃, the fire damper will automatically close quickly to avoid fire spreading. According to the shape, there are rectangular & round type. According to the control way, there are manual, electrical, pneumatic type.The blade can be single blade or multi-blades. The fireproof class can reach A60.

Technical Specification:

Design Standard: CB/T3557-1995

Material: Steel, Stainless Steel, Steel with Galv

Main Parts: manual actuator, temperature detector, damper body, damper plate, main shaft, flange, drag line.

Fireproof Class: A0,A15, A30, A60

Certificate:ABS,BV,CCS,DNV,GL,LR,NK,KR

Main Functions & Features:

1)The fire damper is opened under the normal situation.
2) When the temperature within the duct reaches 70 ± 3 ℃, the temperature fuse is blown, the damper is closed automatically.
3)The fire damper can be closed by dragging the manual steel dragline, the dragline length is nornally 1.5meter.

4) The damper needs to be reset manually.

Main Size List(mm)：

L can be decided by the customer. But in the type approval certifiate, L=320mm