Marine Pneumatic Fire Damper

Marine Pneumatic Fire Damper

1. Introduction:

Marine pneumatic fire damper is a specialized device used in marine applications, particularly on ships and vessels, to prevent the spread of fire and smoke through ventilation ducts and bulkheads. It is a crucial safety component designed to protect the ship and its occupants in the event of a fire.

The primary function of a pneumatic fire damper is to automatically close off ventilation ducts and openings in bulkheads when a fire is detected. It helps to contain the fire and prevent the spread of smoke and flames to other compartments, thereby allowing more time for evacuation and fire-fighting efforts.

2. Configuration Options:

Comparison
Product Picture of other low quality supplier		Product Picture of our factory
Other low quality supplier	Consequence	Our Factory	Consequence
Air leakage does not meet the requirements	Excessive air leakage from fire dampers will cause major safety hazards	The airtight performance is selected according to the requirements of CB/T3557-1995 "Marine Fire Damper"	Before the fire damper leaves the factory, it is necessary to detect its air leakage. The use of the air gate is more assured and safer
The thickness of the damper shell does not meet the requirements	It will directly affect the use time of the damper	The thickness selection of the damper shell The regulations of each classification society are consistent with the SLOAS requirements	The thickness of the damper shell is up to standard, and the service life of the damper is longer
The installation accuracy of the connecting rod between the baffles is not enough	As a result, when the fire damper is closed, the shutter still cannot be completely closed.	The connecting rod between the baffles is installed with high precision	When the fire damper is closed, the shutter can be fully closed.
The fire rating does not meet the requirements	It is easy to leave a safety hazard	Select as required	Product use more assured, longer service life

4. Operating Principle:

Fire damper consists of pneumatic actuator(rotating cylinder), manual reversing valve, fire brake body and temperature sensor etc.

When the air source provides a certain amount of compressed air to the pneumatic actuator through the manual directional valve and the mechanically controlled directional valve, the rotating cylinder drives the damper blade to rotate 90 degrees, and the gate is in a full open state. When the fusible plate of the temperature sensor fuses, the action of timing controlled directional valve can cutoff the air supply to the rotating cylinder, and the exhaust pipe is opened, the compressed air in the cylinder is discharged, and the damper blade is driven to reserve rotate 90 degrees under the action of the rest inside the cylinder, and the strobe is in the closed state.

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5. Features:

The fire damper should normal open on getting compressed air&electric power, and should be close on loss of compressed air or electric power. Pneumatic operating is 0.5-0.8MPa.

If the temperature of air in damper duct exceeds 70±3℃, the fusible link of fire will be broken and the change valve will cut off the compressed air source to close the fire damper.

On/off status of control electric source for solenoid change valve could be controlled locally or remotely, thus open/close the fire damper.

Manual change valve can be controlled by handle dragline, and the fire damper can close locally or remotely.

On/off signal out when the fire damper is on/off.

6.Trouble shooting:

Fault	Possible problem	Recommended action
Fire damper closed	1. Air source not supplied 2. The manual directional valve is damaged 3. Rotating cylinder damaged	1. Check the air supply pipeline 2. Replace the manual directional valve 3. Repair or replace the rotating cylinder

7. Outline Drawing:

8. Product Showing: