.webp "Damper dia 160 mm")
.webp "CAV controller")
.webp "Circular CAV controller")
.webp "CAV controller 160 mm diameter")
.webp "Pressure controlled damper")
.webp "Circular CAV constant pressure controller")
EU declaration conformity
Circular CAV controller | 160 mm
Product description
Function: It's a motorized damper that uses a built-in differential pressure controller to automatically adjust its position and maintain a constant airflow in a circular duct.
Precision & Control: Because it's motorized, it provides more precise control than mechanical versions and can be operated remotely.
Specifications: Designed for 160 mm ducts, it's powered by a 24 VDC (PoM) supply and can regulate air velocities from 0 to 10 m/s.
Airtightness: The device ensures minimal air leakage. Its damper blade has Class 4 airtightness, while the enclosure is rated Class D according to EN 1751.
Configuration: All settings, including the setpoint and min/max damper positions, can be adjusted via Modbus RTU communication.
Applications: It's a valuable tool for providing specific airflow to different zones in buildings, commonly used in places like hospitals, laboratories, and cleanrooms.
Additional specifications and description
How does this damper keep airflow constant?
This circular motorized damper has an integrated pressure controller. The damper blade position is automatically controlled to maintain differential pressure (air volume flow or air velocity) constant at the desired setpoint. In case of strongly fluctuating demand for fresh air in the different rooms of a building, this control valve can guarantee a constant air supply in a certain room. Airflow has a significant impact both on the quality of the air we breathe and on our comfort. Proper airflow provides ventilation, i.e. brings fresh whilst removing stale air, thus the levels of indoor air pollutants, such as volatile organic compounds (VOCs), carbon monoxide, and other harmful gases are minimized. This is also called a CAV (Constant Air Volume) controller. The setpoint can be adjusted via Modbus RTU communication or via the SenteraWeb cloud platform.
What makes this damper energy-efficient?
This circular damper can be used in combination with standard circular ducts with a diameter of 125 mm. The circular ducts can be inserted inside the damper. To guarantee the airtightness of the system, the transition between duct and damper must be sealed with aluminum tape. The damper does not cause extra air resistance because the ducts can be slid into the damper. This increases the efficiency of the complete system. Resistance and pressure drops are reduced to the absolute minimum. As a result, the energy consumption of the fans will be significantly lower.
How does Power over Modbus simplify installation?
Modbus RTU communication and 24 VDC supply voltage can be connected via one UTP cable - we call it Power over Modbus or PoM. To facilitate wiring, we recommend to use the Sentera 24 VDC power supplies with RJ45 connector. These power supplies offer protection against short circuit, overload and overvoltage. A 24 VDC supply voltage increases the safety and reliability of your installation. This CAV controller can also be connected via the terminal block. Make sure not to connect the supply voltage via the terminal block and via the RJ45 socket simultaneously! The desired differential pressure setpoint and all other settings can be adjusted via Modbus RTU communication. After writing the desired setpoint into Modbus Holding register 25, the CAV controller will automatically adjust the damper position and maintain the differential pressure constant. An overview of the complete Modbus register map (all adjustable settings) can be downloaded on top of this page. 
Can you remotely control this device?
Can you remotely control this device?
The ACDPH CAV controller can work stand alone, it can be integrated in a Modbus RTU network or it can be connected to SenteraWeb - the online HVAC portal. When connected to SenteraWeb, it is possible to remotely control and monitor the CAV controller. SenteraWeb has a day-week scheduler to define different regimes during certain moments in the week. When the differential pressure goes out of range, alerts and notifications can be sent to different users.
What makes this damper durable?
The damper is made of high-quality r-ABS plastic. This material is exceptionally heat resistant, very tough and offers good protection against impacts. The metal damper blade is protected against corrosion. The actuator and CAV controller are seamlessly integrated in the damper. This minimizes mechanical frictions and allows us to align all mechanic components in an optimal way.
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