Understanding the difference between a pressure independent and pressure dependent.

In this video, you’ll see the Phoenix control valve Venturi in action, showing the difference between dependent and independent airflow control.

Phoenix Controls can help improve your ventilation and air quality with our Venturi Valves and controllers. No maintenance on the valves means you don’t have to constantly measure flow, adjust dampers, or recalibrate sensors.

Control designed for critical environments High-performance, variable air volume airflow control valves for fume hood intensive, high-level containment, and pharmaceutical manufacturing facilities.

PHOENIX CONTROLS SCP VENTURI VALVES
Phoenix Controls Venturi Valves for the Critical Spaces Control Platform (CSCP) are available for Constant Volume, Two-State, or fully Variable Air Volume (VAV) applications. The Phoenix Controls Venturi valve maintains setpoint and accuracy without the need for airflow measurement or field calibration. Whether Wet Chemistry research, Healthcare, High Purity Manufacturing, Life Science, or general ventilation, Phoenix Controls has a venturi valve to meet the strict needs of the most demanding customers.

APPLICATIONS
Phoenix Controls offers a wide variety of venturi valves in various sizes, chemical resistive coatings, pressure ranges, and actuation styles to meet your needs.
High-speed actuation (less than 1 second response to command change) is used for demanding environments where instantaneous containment is required - such as fume hoods in wet chemistry research, pharmaceutical manufacturing, or compounding pharmacies but can be used for any application. Hospitals, BSL spaces, Life Sciences, EV Mobility manufacturing, and general ventilation all require airflow accuracy and repeatability yet typically only operate at standard speed actuation (40 - 90 seconds).

Standard speed tracking control is an economical solution for room-level ventilation, pressurization, temperature, and humidity control in either standalone or integrated systems where up to 4 individual valves can be controlled from one single zone controller. Fewer components mean lower upfront cost and easier installation.

Constant volume applications provide steady and accurate airflow control without sophisticated electronics. Phoenix Controls constant volume venturi valves have no electronics thus require no wiring and no power yet are still factory characterized to provide the same level of accuracy as the fully electronic valves. Constant volume valves are field adjustable with simple hand tools if airflow requirements change in the future.

VENTURI VALVE FEATURES
• Mechanically pressure independent internal cone and spring assembly.
Valves are pressure independent across the entire rated pressure specification and flow range. This provides stability of airflow and instantaneous response to changing duct pressure. No actuation is needed to maintain flow setpoint.
• Accurate to +/-5% of setpoint at any flow and any pressure within rated specification.
Factory characterization on 3rd party validated air stations guarantees accuracy. Less field balancing translates to quicker startup on site.
• Inlet and exit insensitive.
Elbows and duct transitions do not cause inaccuracies or require field calibration of venturi valves.
• No Scheduled Maintenance.
Once installed the venturi valves will remain maintenance free for many years
• Turndown ratios up to 20:1.
High turndown ratios offer maximum flexibility in flow range for energy savings, and allow for future expansion for changing needs.
• Fast speed of response to setpoint changes.
High-speed linear actuators provide ‹ 1 second position response to a setpoint change.

Contact us today for help on your next HVAC application.

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