How would you ensure that the environmental conditions and temperature of a tunnel is balanced while all the vehicles and trains are continuously passing through it? This will be taken care of by tunnel ventilation dampers. These dampers are designed to maintain the natural ventilation in the vehicular tunnels. These dampers have other important functions such as—they control the direction of airflow and migrate smoke within the tunnel because of fire in the tunnel. These dAampers are made from a combination of stainless steel, galvanized steel and aluminium which enable them to withstand the immense force and pressure. While buying a tunnel ventilation damper, you must ensure to keep a few important points in mind.
Features of a tunnel ventilation damper
You must be aware of the qualities of a good and reliable tunnel ventilation damper so that it is easier for you to choose the appropriate product. Some of the features of a good damper are listed below:
- Assure the durability of the damper
A good damper has always possessed heavy gage material. Your damper must be welded perfectly at the corners. It must have enough strength to withstand rough site handling. The blades of a good damper should be able to tolerate high-pressure fluctuations.
- Buy a damper with minimum leakage
Make sure that the tunnel ventilation damper that you are going to buy seals its openings properly on shutting. It is a very important feature because it controls the toxic smoke in a tunnel. These designs are vital in a damper to ensure the protection of human lives. Standard dampers have an airtightness of approximately 99.86% and a duct velocity of 10.2 m/s with a pressure equal to 1000 Pascals.
- Ensure that the damper has low airflow resistance
The design of the tunnel ventilation damper is made such that it provides a low resistance to airflow. The system loss, in this case, is significantly higher.
- Must have a good resistance towards temperature
Another characteristic of a damper is that they are made to tolerate hot temperature that can go from 150°C to 250°C for the duration of 2 hours. This temperature is maintained in the damper because of the steels used to manufacture them and they can absorb thermal expansion when hot gases are present.
- Easy to maintain and install
Sleeves are used to install the ventilation dampers in the building walls. The dampers are almost maintenance-free because of the high-quality material used to manufacture them. However, they should be tested on a regular basis for the proper functioning of the pneumatic system and for the assurance that no obstructions remain in the blade movements.
- The damper should be corrosion resistant
It is very important for the damper to be corrosion free so that it can tolerate the extreme heat and can function properly. This is the reason stainless steel is used to make and install tunnel ventilation damper.
Hence, you must check all the qualities of a tunnel ventilation damper before buying it. For more information on dampers, you may search for tunnel ventilation dampers on the internet.