Additional specifications and description
Throttle dampers are also known as throttle valves or balancing dampers, as their name suggests, their purpose is to throttle airflow reliably and without introducing unnecessary air leakage or obstruction of airflow. They can be found in larger HVAC systems, as it is sometimes required to balance airflow rates in the high-pressure ductwork. Aerotechnik throttle dampers are easy to operate thanks to a convenient handle with a self-locking mechanism, meaning their adjustment does not require any tools. As they are press-fit and do not require the use of insulating tape, the throttle dampers are very aesthetically pleasing, making them suitable for use in visible duct runs. The throttle valves can be operated in temperature ranges between -15 °C to +100 °C and allow an inflow velocity of up to 12 m/s.
Throttle dampers play a big part in maintaining the airflow inside the ventilation system, as depending on the specific requirements, the air pressure has to be balanced by throttling the flow in some ventilation runs. A typical application might be to balance the airflow in multiple rooms to prevent uneven air pressure between them. Throttle dampers are similar in many ways to shut-off dampers, except that they cannot completely block off a vent. In most cases, they are set at a specific position during the airflow balancing of the HVAC system, and rarely need to be adjusted. Manually operated single-blade throttle valves are the simplest to use and most cost-effective type of airflow control device, and they have proven to be reliable and hassle-free.
Construction and installation:
The body of the damper is constructed out of laser-welded galvanised steel (using the Sendzimir process). The precise manufacturing method ensures that there is no protruding fold at the seam and that the inner surface is as smooth as possible. This helps maintain good airflow and prevents dust and dirt build-up. The oval-shaped metal blade of the damper does not impede airflow or induce excess noise/pressure loss. The male-male ends of the ventilation piece are equipped with EPDM rubber gaskets, making installation or disassembly very easy - just insert the spigots into the duct. The damper does not require additional sealant during installation, even if the duct is slightly canted or poorly trimmed. The EPDM rubber seals offer an airtightness class D according to EN 12237, and the material is also resistant to mildly aggressive vapours and chemical products.
While the device is designed to be quiet, as air flows past the damper blade it will inevitably create turbulence, so to minimise the noise in the ventilation system, it is recommended to install throttle valves closer to the plenum box rather than the diffuser/grille.
Aerotechnik throttle dampers are suitable for installation in horizontal and vertical duct runs. They don’t require any maintenance after installation.
Please note that according to EN 12097, the duct system and the throttle valve must be accessible for operation and maintenance. The final airtightness of the ventilation system depends on several factors, for example, the installation method.