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The last line of defense in the data center fire

  

The fire protection work in the data center is very important, and the fire protection facilities in the data center cannot be without fire dampers. As required by the standard, all air ducts in the air conditioning room shall pass through, and the fire isolation shall be set. The fans of the fire fighting and air conditioning systems shall be interlocked. When the fire valve is closed, the fan power supply will be cut off automatically.

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The fire damper is installed in the fire rating of the pipe or air transmission hole, Hong Kong vps It will automatically close when heat is detected to prevent the flame from spreading through its opening. The design aims to interrupt the air flow, block the flame and isolate the fire by minimizing the spread of smoke and flame, so as to help people in the building reduce the reconstruction cost of the building owner in a timely manner.

Curtain fire damper becomes the industry standard

Engineers can usually choose two types of fire dampers: curtain fire damper and multi leaf fire damper. For 40 years, the curtain cover has become the industry standard, including a series of interlocked blades, folded on the top of the assembly unit, allowing the air passage to obtain the maximum gap. The heat release mechanism or fusible joint is kept together. When the temperature reaches about 165 degrees Fahrenheit, the thermal fuse is disconnected, the blades fall down, and the air passage is closed to prevent the spread of fire. Curtain fire damper

Curtain fire damper

The curtain fire damper meets the requirements of the National Fire Protection Association (NFPA) and the International Coding Committee (ICC) international building codes, so it can be used in situations where fire dampers are required, usually deployed on firewalls and floors. The application of fire dampers may vary depending on the structure of the building and the level of the floor. The building may have several to hundreds of fire dampers. Curtain fire damper is a low-cost substitute for fire damper.

The detection and maintenance of curtain fire damper face challenges

Although curtain fire dampers are widely used, they have some disadvantages. Curtain fire damper design faces challenges in equipment commissioning and maintenance. The data center facility manager has recognized the protection and importance of fire hose. Some jurisdictions (AHJ) and building owners require fire dampers to be tested and maintained regularly, usually involving removing or activating fusible link settings and closing valves. Once closed, it is necessary to reopen the fire damper and replace the fuse.

 

Curtain fire damper hand needs to run in the pipeline

Curtain type fire damper requires pipe in hand for

According to NFPA 80 and 105 standards, all firefighters under normal working conditions of buildings must conduct inspection and test one year before and after installation, and then every four years. Window type fire dampers face challenges in detection and maintenance, because most fire dampers are installed in places that are difficult to access, usually requiring ladders and other equipment. The mechanical testing of curtain type fire dampers is more complex and requires two hands to operate in the pipeline: first move the blade from the slot, then move it to the top of the frame to overcome the spring tension and install new fuses. In some cases, the fire damper must be removed from the pipe for resetting.

According to the number of fire trucks in the building, all these operations are difficult and time-consuming, and each valve needs 15 minutes to 1 hour to replace.

Selection of multi leaf fire damper

Another alternative to curtain fire damper is multi leaf fire damper. The fire valve is composed of many connected rotating blades, which are very similar to the blades of curtain fire damper. They are released from the open position through the heat dissipation mechanism or fusible link, thus closing the damper high-pressure setting.

The maintenance of the multi blade fire damper requires less time and effort. It is easier to operate the blade to the open position by using the crank lever during maintenance. This design does not require more maintenance of the fire damper. However, the multi leaf fire damper is more expensive, with a rated power of 4000 fpm and a standard static pressure of 8 "w.g

Design of new fire damper

The recently launched DFD-LP dynamic fire damper has become another choice for engineers. The fire damper adopts a single blade, which is easy to reset the fusible joint, and is more complex than the curtain refractory brick structure. DFD-LP dynamic fire damper is easier to maintain, and can provide better performance and pressure reduction capability. In addition, their cost is lower than that of multi leaf fire damper.

DFD-LP fire damper

DFD-LP fire damper

The rated power of DFD-LP fire damper is 4000 fpm, and the standard static pressure is 4 "wg, which is independent of the size of the fire damper. In addition, DFD-LP fire damper has a lower DFD-LP fire damper with a 90 minute fire performance, as well as curtain fire damper and multi blade fire damper grades, which comply with all current building codes.

Select the best fire damper

How do engineers make the best choice for the above three fire dampers? The above three fire dampers comply with the current building codes and UL555 standards, and provide the same fire rating. The difference between them lies in their construction or design and performance.

When selecting three fire hoses, the Engineer shall consider the following issues:

Which fire damper meets their system conditions under wind speed and pressure drop?

How important is cost?

How much time do they spend on maintenance?

Which fire valve is more flexible and convenient for users to install?

In the past, curtain fire damper was the standard of architectural design. Now, with more choices, engineers can choose the most suitable fire valves for the actual needs of buildings to protect the safety of buildings. www.kaivps.com