Installation methods and precautions for fire dampers

2025-11-20
1. Before installing the valve body, it is necessary to check whether the valve shape and operating mechanism are intact, whether the action is flexible, and confirm that all aspects of the valve are normal before installation.
2. When installing smoke exhaust valves and smoke fire dampers, a space should be reserved on one side of the valve body, generally not less than 350mm, for regular action tests and inspections.
3. Valves should undergo regular opening action tests before installation or during use after installation, and it is recommended to conduct them every six months to one year. The action test includes using electrical signals to open or manually open the valve, and there should be an electrical signal output after the valve is activated.
4. The valve body should have separate supports and hangers to avoid deformation of the air duct at high temperatures, which may affect the valve function.
5. When installing the valve body in the suspended ceiling, an inspection door hole should be provided under the observation and operation mechanism, with a general size of not less than 450x450mm. If conditions are limited, the maintenance hole in the suspended ceiling can also be reduced to 400 × 400mm.
6. Electrical circuits and remote control steel cables should use ordinary plastic pipes of Dg20 as protective sleeves.
7. The bending radius of the steel cable sleeve should not be more than 250mm, and there should generally be no more than 2 bends. The length of the steel cable is generally 6m, and if the length exceeds 6m, it should be specified at the time of ordering. It is generally advisable to use close range control.
8. When the exhaust outlet (air supply outlet) valve body is built inside the wall, the valve body should not become a load-bearing object, otherwise the valve will malfunction after being squeezed and deformed.
9. After placing the valve body into the reserved hole, fill the surrounding area with cement, mortar, or other non combustible materials.
10. Installation method for smoke exhaust products, for user reference.