HBT - Model Phoenix Controls -Precision Airflow Control Systems for Critical Environments

• Safety. Safety for world-class research laboratories. Safety for collaboration in the world of emerging sciences. Safety for patients and staff in state-of-the-art hospitals. For your critical room control system needs, Phoenix Controls is simply the best.
• Testing and Balancing. Testing and balancing (TAB) can be difficult and time consuming. Without the right device, you may find yourself doing it over and over. These redundant efforts are eliminated by installing the Accel II venturi valve. Its true pressure-independent performance and factory characterization saves time and money by reducing TAB time and ensures stability in room pressurization. TAB time is also reduced because every valve is factory characterized with a 48-point flow curve on NIST-certified valve characterization station at our US headquarters. This means that as soon as the valves are installed, most of the system commissioning can be completed before the fans are ever turned on.
• Long-term Stability. Long-term stability is assured with true pressure-independent performance. Once the building system is running, conditions will change and so will system static pressures. The Accel II venturi valve’s unparalleled pressure-independent performance pays dividends with constant airflow control accuracy and proper room pressurization. This high-performance, airflow-metering device is the foundation of every airflow control system we provide whether it’s Celeris, Theris, Traccel, or Analog.

The most commonly used airflow control device is the Terminal box, or VAV box. While this device has always done a great job of providing tempered air into a space for comfort control, it typically falls short when trying to maintain directional airflow or proper pressurization.

Back in the 1980s, Phoenix Controls began developing and modifying a venturi valve for use in laboratories where fume hoods were being used. The traditional approach to these spaces was the VAV box and while they did a good job of maintaining temperature, they demonstrated an inability to consistently provide proper airflow and pressurization. To compound the problem, differential pressure sensors were used to control airflow devices and for maintaining room directional airflow. A very challenging method when doors are often left open.

For these reasons Phoenix Controls developed a unique approach to maintaining directional airflow. This simple concept is called the “Volumetric Offset” approach. The theory is that if you are able to accurately exhaust more air from a space then what is being brought in, additional air would infiltrate the space to make up the difference: Exhaust volume = Supply volume + Offset. In fume hood laboratories where the door(s) are opening and closing often, the volumetric offset approach was, and still is the best solution.