KTQ-O Round fire damper for quick installation
KTQ-O fire dampers for quick installation are designed for use in general ventilation systems as cutoff barriers, separating the fire-affected zone from the rest of the building (normally open). The function of fire dampers is to prevent the spread of fire, heat, and smoke.
KTQ-O fire dampers are CE marked and hold the Certificate of Constancy of Performance No. 2434-CPR-0382, issued by CTO Gdańsk, in compliance with the requirements of the PN-EN 15650 standard. KTQ-O dampers have a fire resistance classification of EI 120 (ve i↔o) S and can be installed in the following construction partitions:
- Rigid walls with a thickness of 100 mm or greater and a fire resistance of EI120 or higher (e.g., concrete walls, solid brick walls, walls made of aerated concrete blocks or hollow blocks, and panels),
- Flexible walls with a thickness of 100 mm or greater and a fire resistance class of EI120 or higher (thicker, denser, multi-layer panels).
KTQ-O dampers can also be installed in partitions with lower fire resistance. In such applications, the fire resistance of the KTQ-O damper will equal the fire resistance of the partition.
What sets the KTQ-O fire dampers for quick installation apart from other round dampers in our offer is their installation on the surface of the wall instead of inside the wall opening. Additionally, they have a significant advantage over competitors’ products – the installation gap requires no finishing, even if the opening is square (as is common with flexible walls). This feature allows one-sided installation, e.g., in shaft walls without access to the interior or with ducting directly behind the wall. It also guarantees the proper positioning of the damper in the wall, ensuring correct installation and maintaining the declared fire resistance. This minimizes the risk of corrections, complaints, or issues during inspections, lowers the overall cost, and does not extend the installation process of the entire ventilation system.

Are you considering the KTQ-O fire damper for your design? Contact us for free design advice.
We manufacture KTQ-O dampers in diameters typically used in round ventilation systems: 100, 125, 150, 160, 200, 250, 300, and 315 mm. All dampers are produced with a standard male connection, allowing direct connection to a round pipe. The damper can be equipped with seals to ensure a high level of connection tightness.
Installing dampers in openings prepared as for any other damper can reduce installation time by 50-70%! We estimate an average time savings of 30 minutes per damper.
Yes, proper installation of the KTQ-O damper is possible in such cases, as it does not require any finishing (filling) of the installation gap after the damper is installed, which would otherwise require access to the other side of the wall. It is important to prepare the installation opening in accordance with the damper’s technical documentation.
We offer KTQ-O dampers only in the KTQ-O-E variant. This is a fire damper for ventilation ducts (normally open), equipped with a return spring actuator, combining safety and comfort functions.
The drive system consists of a BELIMO BFL series electric actuator (with a power supply voltage of 24 [V] AC/DC or 230 [V] AC). When power is supplied to the actuator wires, the damper opens. Automatic damper closure occurs when the BAT72 thermal trigger is activated. Remote damper closure is achieved by disconnecting the power (when the voltage is interrupted, the return spring in the actuator returns to its free position, causing the damper to close).