Explosion-proof and fire-resistant dampers are used in the ventilation and air conditioning systems of industrial buildings in hazardous environments involving flammable gases or steam.通常保持开启状态，在发生火灾时，管道内气体温度一旦达到At 70°C, the fusible link melts, causing the valve to close automatically under the force of the torsion spring. It meets the requirements for fire resistance stability and integrity within a certain time, serving as a smoke and fire barrier. When the valve is closed, a shutdown signal is output.
Explosion-proof fire prevention valve material: zinc-plated or stainless steel frame, aluminum alloy blade material, actuator is explosion-proof, explosion-proof grade:DIIBT4 or CT4, custom made as per customer's request.
Our company actively complies with the "Announcement on Mandatory Product Certification for Certain Fire Protection Products" issued by the General Administration of Quality Supervision, Inspection and Quarantine, the Ministry of Public Security, and the Certification and Accreditation Administration. （(Announcement No. 12 of 2014) stipulates the timely processing of mandatory product certification for fire products (CCCf certification), which is now fully certified across the entire series, including materials like stainless steel, fully automatic, and remote-controlled options.
Installation of fire dampers:
The fire damper can be interlocked with ventilators and exhaust fans.
2. The operating mechanism side of the valve should have a clear space of not less than 200mm for maintenance.
Before installing the valve, it is essential to check that the operating mechanism is intact and operates smoothly and effectively.
4. Fire dampers should be installed in the duct sections adjacent to the wall or floor. The distance from the fire damper to the wall surface on both sides of the fire partition wall should not exceed 200mm. The pipes and their insulation materials within a 2.0m range on both sides of the fire damper should be made of non-combustible materials.
5. Fire dampers should be supported by independent hangers and brackets to prevent pipeline deformation during a fire, which may affect their performance.
6. The fuse link of the fire damper should be installed on the side facing the higher fire hazard.
Selection Key Points
1. The main control parameters for selecting fire dampers are specifications, etc.
2. Fire dampers are suitable for ventilation and air conditioning systems. For kitchen exhaust systems in public buildings, the fire dampers operate at a temperature of 150℃. In general ventilation and air conditioning systems, the fire dampers activate at 70℃.
3. Fire dampers are suitable for ventilation, air conditioning, or exhaust system pipes, with their basic functions and application scope.
4. When selecting valves, pay attention to the valve functions, such as whether it is normally open or normally closed, automatic on/off, manual on/off, manual reset, signal output, and remote control requirements.
5. Is the valve linked to the fan?
