Volume Flow Controller
Aerotechnik E. Siegwart is your expert for high-quality volume flow controllers. Our products represent quality and reliability, optimally fulfilling your ventilation technology requirements. Volume flow controllers are essential components in ventilation systems. They enable precise control and regulation of the airflow rate, which is essential for an optimal indoor climate and energy efficiency.
Volume flow controllers from Aerotechnik E. Siegwart create an ideal indoor climate for well-being. Quality and experience “Made in Germany” that you can see and feel.
Our volume flow controllers are available in a variety of designs. Whether round or rectangular, mechanically self-regulating or electronically/pneumatically controlled - we offer precise technology for every need. Additionally, our devices are available in materials like galvanized steel or stainless steel and can be painted upon request. For special application areas, we also have ATEX-certified models available.
The round models with the patented double-lip sealing system Lipstar at the push-fit ends ensure not only easy installation but also air tightness according to the highest class D according to EN 1751 and almost no leakages in the system for even better energy efficiency.
Discover our diverse range of volume flow controllers, customized precisely to your individual requirements.
Volume Flow Controllers
Constant volume flow controllers are crucial for maintaining a consistent airflow rate in ventilation and air conditioning systems. They ensure a steady amount of air, unaffected by pressure fluctuations, contributing to a stable and comfortable indoor climate.
Variable Volume Flow Controllers
To optimize energy efficiency and indoor climate, variable volume flow controllers offer the ability to dynamically adjust the airflow rate as needed. This technology is particularly effective in environments where flexibility and adaptability to changing conditions are required.
Optimization of Air Flow
The measuring instruments from Aerotechnik E. Siegwart – including a measuring nozzle, measuring stick, and measuring box – play a crucial role in the precise adjustment and monitoring of volume flow controllers in ventilation systems. With their high accuracy and easy application, they are specifically designed for a variety of measurement requirements. These tools are essential for professionals who value efficient monitoring and optimal maintenance of their volume flow controllers in ventilation systems.
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Advantages of Volume Flow Controllers
Volume flow controllers are pivotal in modern ventilation and air conditioning systems. Not only are they responsible for the precise management of the airflow rate, but they also bring a multitude of benefits that positively affect both operating costs and user well-being:
Energy Efficiency: By accurately setting the air volume flow, volume flow controllers reduce energy consumption and help lower costs.
Comfort Enhancement: A constant and customized air supply ensures a pleasant indoor climate and increases comfort for all attendants.
Durability: Volume flow controllers from Aerotechnik Siegwart are known for their robustness and longevity, which saves maintenance costs in the long run.
Flexibility: With variable models, the air flow can be flexibly adjusted, making them ideal for rooms with changing usage.
These benefits make volume flow controllers an essential part of any ventilation and air conditioning system and a smart investment for buildings of any type and size. Discover our range and find the perfect volume flow controller for your needs.
Contact Us for Customized Air Volume Solutions
Do you have specific questions about our volume flow controllers or need advice to find the optimal solution for your system? Our team at Aerotechnik E. Siegwart is at your disposal with comprehensive expertise and years of experience. We support you not only in selecting the right volume flow controller but also offer personalized consultation and adaptation to your specific needs. Whether it is about installation, commissioning, or maintenance questions – we are here for you. Contact us to learn more about our products and services or to receive a custom quote.
Frequently asked questions about volume flow controllers
A volume flow controller keeps the air volume flow in a ventilation or air-conditioning system constant or adjusts it according to demand. This ensures the required air volume regardless of pressure fluctuations in the duct network, even if something changes in other areas of the system.
Constant volume flow controllers (CAV, Constant Air Volume) maintain an air volume flow once set, while variable volume flow controllers (VAV, Variable Air Volume) continuously adjust it to the actual demand, for example depending on room occupancy, CO₂ content or temperature. The CAV controller operates mechanically and without auxiliary energy, while the VAV controller is regulated via an actuator mounted on the body.
They ensure that the planned air volumes actually arrive and thus create the basis for an energy-efficient system. Over the operating life, five points have an effect: ensuring the planned air volumes, energy savings through optimized air distribution, improved comfort for users, less noise generation due to stable operating conditions, and support for demand-controlled ventilation.
Yes, both CAV and VAV controllers can be used in supply air and extract air systems. The prerequisite is that the device is designed for the respective application. You can find the relevant information in the technical documentation for the series.
Volume flow controllers from Aerotechnik E. Siegwart are generally low-maintenance and do not require their own maintenance intervals. As part of the regular maintenance of the ventilation system, contamination, the mobility of the control elements, and the function of sensors and actuators should be checked.
We manufacture constant and variable volume flow controllers from galvanized steel and stainless steel, and individual components also from aluminum. On request, we paint the volume flow controllers in the customer's preferred color.
The volume flow controllers from Aerotechnik E. Siegwart are available in ATEX design and as a special version for temperatures up to 180 °C. We also offer the round series with a flange instead of a plug-in end with double-lip gasket made of EPDM.
A CAV controller keeps a fixed set air volume flow constant and automatically compensates for pressure fluctuations in the air duct system.
Constant volume flow controllers are used wherever the air demand remains the same throughout the day. Typical applications are offices, corridors, technical rooms, storage areas, and sanitary areas.
Our constant volume flow controllers can be installed both horizontally and vertically. The decisive factor is the product-specific information in the technical documentation for the respective series.
For precise measurement and control, a sufficiently long straight inlet section should be provided upstream of the controller. As a guideline, at least 2.5 × pipe diameter or duct diagonal applies. If disturbance sources such as bends, branches, or fans are located directly upstream, a longer calming section may be necessary.
Constant volume flow controllers should be installed in straight duct sections. Turbulence caused by bends, reducers, or branches directly upstream of the device impairs control accuracy and should be avoided.
Mechanical volume flow controllers generally operate without an external power supply and do not require an electrical connection. Electronic versions or variants with additional functions may require an electrical connection.
CAV controllers are the simpler and more robust technology. They function without auxiliary energy and only need to be set once; commissioning and balancing are straightforward. This results in lower investment and maintenance costs, and the control and automation effort is lower. Fewer components mean high operational reliability. For constant air demand, CAV controllers are therefore the first choice.
A VAV controller continuously adjusts the air volume flow to the current demand and thus enables energy-efficient and demand-controlled air distribution.
Variable volume flow controllers are used wherever occupancy and therefore air demand change. Typical application areas are office buildings, schools and universities, hotels, conference rooms, hospitals, and laboratory areas.
Rectangular electronic volume flow controllers must be installed with the blades in a horizontal position. The round variants can be mounted both horizontally and vertically.
For high control accuracy, a free inlet section of 2.5 × pipe diameter or duct diagonal is required. For the VRSE 600 series, the recommended length is 5 × pipe diameter.
Installation should be carried out in a straight duct section. Disturbance sources such as bends, T-pieces, silencers, or fans directly upstream of the controller impair measurement accuracy and should be avoided.
Yes, variable volume flow controllers can be retrofitted in many cases. The prerequisites are sufficient installation space, suitable duct dimensions, and integration into the existing control system and building management system.
Depending on the version, 0–10 Volt control signals or optionally 2-10 Volt are used. Depending on the specifications of the planner or developer, communication protocols or bus systems such as MP, MOD or BACnet, or digital communication interfaces are used. Depending on the series and requirements, the actuators are supplied by well-known manufacturers such as Sauter, Siemens, Rotork Schischek, PI Safety, Gruner or Belimo etc.
VAV controllers deliver only the amount of air that is actually needed. This reduces energy consumption and, over the service life of the system, also operating costs. The demand-controlled air supply increases user comfort and can be flexibly adapted to changing room occupancy.
