Fire damper cartridge with extended casing

Fire damper cartridge with an extended casing to allow the installation of a valve of your choice, also in galvanised or stainless steel (not included) for installation at duct’s end.

Available diameters 100mm > 200mm

  • Easy to install
  • No space is lost at the wall crossing
  1. Steel tunnel
  2. Two semi-circular blades
  3. Intumescent strip
  4. Rubber sealing ring
  5. Fusible link 72°C
  6. 2 blocking hooks
  7. End of range switch (option)
  8. Product identification
  • Lightweight
  • Tested according to EN 1366-2 up to 300 Pa
  • Suitable for rigid wall, rigid floor and light wall (metal stud gypsum plasterboard wall)
  • Maintenance-free
  • For indoor use
  • Ambient temperature below 50°C

Download the technical brochure of the SCV+ series


Thank you for expressing interest in our products. We are delighted to provide you with the technical brochure of the SCV+ series. We appreciate your enthusiasm and look forward to assisting you further on your journey.

To download the brochure, please click the button below:

We hope our product brochure provides you with comprehensive insights into the features and benefits of the SCV+ series. If you have any questions or require additional information, please don’t hesitate to reach out to our friendly sales & support team. 

Thank you again for choosing Rf-Technologies. 

Best regards,

Tony Readdy

Technical Sales Expert UK

M. 07939 316006 |

Circular Fire Damper Cartridges: Enhancing Fire Safety in the UK


When it comes to fire safety, circular fire damper cartridges play a crucial role in protecting lives and properties. These essential components are designed to prevent the spread of fire and smoke within ventilation systems, ensuring the safety of occupants and minimizing the devastating impact of fires. In this article, we will delve into the significance of circular fire damper cartridges, their functions, installation guidelines, and maintenance practices, highlighting their importance in safeguarding buildings across the UK.

Understanding Circular Fire Damper Cartridges:

Circular fire damper cartridges are purpose-built devices that are installed within ventilation systems. Their primary function is to regulate airflow and act as barriers against the spread of fire, heat, and smoke throughout a building. By compartmentalizing the ventilation system, these cartridges effectively contain fire within designated areas, facilitating safe evacuation and preventing further damage.

The Role of Circular Fire Damper Cartridges in Fire Safety:

Fire Containment: Circular fire damper cartridges act as effective fire barriers, preventing the rapid spread of flames, smoke, and heat from one area of a building to another. This containment allows individuals to safely evacuate and helps to minimize fire damage.

Smoke Control: Circular fire damper cartridges play a critical role in controlling the movement of smoke. By restricting the flow of smoke, they help maintain clear evacuation routes, reducing the risk of smoke inhalation during fires.

Compliance with UK Regulations: Installing circular fire damper cartridges is often a legal requirement in the UK. Compliance with fire safety regulations and codes ensures that buildings meet the necessary standards, enhancing the safety of occupants and protecting property owners from potential liability issues.

Installation Guidelines for Circular Fire Damper Cartridges:

Proper installation is crucial to ensure the effectiveness of circular fire damper cartridges in fire containment. Here are some key installation guidelines to follow:

The fire damper cartridge is inserted into a metal ventilation duct of the same diameter, and is held in position by its rubber seal. Both parts of the blade are held in the open position by the fusible link. 

When the temperature in the duct reaches 72°C, the fusible link melts, and both parts of the blade close.

Two blocking hooks lock the blade in the closed position, and the intumescent material expands, providing a perfect seal to stop flames and smoke.




Professional Services: Engage certified professionals who specialize in fire safety and damper installation to ensure proper installation. These experts possess the necessary knowledge and expertise to carry out installations correctly.

Strategic Placement: Circular fire damper cartridges should be strategically placed at fire-rated walls, floors, or partitions. The positioning should be based on engineering specifications, considering the building’s design and fire safety requirements.

Compatibility and Testing: Ensure that the selected circular fire damper cartridges are compatible with the ventilation system in use. Thoroughly test them to ensure proper functionality and compliance with safety standards.

Maintenance Practices for Circular Fire Damper Cartridges:

Regular maintenance is essential to ensure the longevity and optimal performance of circular fire damper cartridges. Here are some maintenance practices to consider:

Routine Inspections: Regularly inspect all circular fire damper cartridges to identify any signs of damage, corrosion, or debris accumulation. Promptly replace or repair any faulty components.

Cleaning: Keep the cartridges free from dust, dirt, or any obstructions that may hinder their performance. Follow manufacturer guidelines for appropriate cleaning methods and frequency.

Functional Testing: Periodically conduct functional tests to verify the proper operation of the circular fire damper cartridges. These tests should adhere to industry standards and be documented for compliance purposes.


Circular fire damper cartridges are indispensable when it comes to fire safety in the UK. By effectively containing fire and smoke, they protect occupants and minimize property damage. Adhering to proper installation guidelines and implementing regular maintenance practices ensure the continued effectiveness of these crucial fire safety components. Prioritizing the installation and maintenance of circular fire damper cartridges is a proactive approach that significantly contributes to overall fire safety and compliance with UK regulations.

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