TAB Journal Spring 2014 - (Page 5)

Calibration and Balancing of Phoenix Valves in Laboratories Charles Brown, TBE Technical Air Balance, Texas The majority of firms that have been in the air balance industry for any length of time have encountered balancing in some sort of laboratory facility. Balancing a lab poses some of the most challenging air balance work a technician can encounter, and it is not uncommon for an air balance technician to deal with just about every type of air flow issue or problem possible. Depending on the type of system installed, the balance work may be made much harder if the incorrect device and/or system for the application is utilized. A lthough there are several different types of air volume control devices and systems used in the construction of laboratories and vivariums throughout the country, the Phoenix Valve is one of the most popular, and is the preferred choice for the exhaust side. The Phoenix Valve is a very forgiving volume control device. It doesn't require the typical four duct diameters prior to the inlet or two duct diameters TAB Journal Spring 2014 after the discharge in order to ensure proper functionality. The device controls airflow by virtue of the cone assembly system inside the valve body. The cone assembly has the ability to quickly compensate due to changes in static pressure. This fast-acting capacity allows the Phoenix Valve to respond quickly to a rise or drop in pressure, and this is critical in maintaining the necessary pressure hierarchies needed to ensure the safety of the occupants in or around the lab areas. As stated, the Phoenix Valve is forgiving of the usual installation requirements as well as having the ability to respond quickly to any rise or drop in system pressure. These two features are what make it a desirable volume control device. Laboratory rooms are extremely pressure sensitive due to whatever is being tested, studied or created in the lab. The more toxic the substance being tested, studied or created, the stricter the need to maintain reliable pressure hierarchies. Years ago, maintaining pressure hierarchies was a simpler process as the areas in which laboratories were placed consisted of much smaller spaces. That isn't the case today, especially with universities constructing elaborate lab environments for conducting research, which may have up to five or more floors in a mid-rise building. The amount of laboratory rooms and the variety of studies and tests being run in these rooms demands a strict pressure hierarchy to ensure the safety of occupants from lab to lab, floor to floor as well as those outside the building. It is not uncommon to have ten or fifteen labs per floor across five 5

Table of Contents for the Digital Edition of TAB Journal Spring 2014

Indirectly Determining Air Volume
Calibration and Balancing of Phoenix Valves in Laboratories
The Trouble with Canned Specs
Environmental Considerations of the Southwest
Airflow Measuring Station Considerations
Putting the Proper "SPIN" on Things
Chasing the Air

TAB Journal Spring 2014

https://www.nxtbook.com/ygsreprints/AABC/tab-journal-winter-2021
https://www.nxtbook.com/ygsreprints/AABC/G122399AABC_Fall2020
https://www.nxtbook.com/ygsreprints/AABC/G120138AABC_Summer2020
https://www.nxtbook.com/ygsreprints/AABC/G118248AABC_Spring2020
https://www.nxtbook.com/ygsreprints/AABC/G116302AABC_Winter2020
https://www.nxtbook.com/ygsreprints/AABC/G114573_AABC_Fall2019
https://www.nxtbook.com/ygsreprints/AABC/G111085_tab_summer2019
https://www.nxtbook.com/ygsreprints/AABC/g108931_tab_spring2019
https://www.nxtbook.com/ygsreprints/AABC/g104992_tab_winter2019
https://www.nxtbook.com/ygsreprints/AABC/g100221_tab_fall2018
https://www.nxtbook.com/ygsreprints/AABC/g97743_tab_summer2018
https://www.nxtbook.com/ygsreprints/AABC/g94804_tab_spring2018
https://www.nxtbook.com/ygsreprints/AABC/g91043_tab_winter2018
https://www.nxtbook.com/ygsreprints/AABC/g86727_tab_fall2017
https://www.nxtbook.com/ygsreprints/AABC/g81312_tab_summer17
https://www.nxtbook.com/ygsreprints/AABC/g78003_tab_spring17
https://www.nxtbook.com/ygsreprints/AABC/g73432_tab_winter17
https://www.nxtbook.com/ygsreprints/AABC/g7002_tba_fall2016
https://www.nxtbook.com/ygsreprints/AABC/g65897_tab_summer2016
https://www.nxtbook.com/ygsreprints/AABC/g62758_tab_spring16
https://www.nxtbook.com/ygsreprints/AABC/tab_winter2016
https://www.nxtbook.com/ygsreprints/AABC/tab_fall2015
https://www.nxtbook.com/ygsreprints/AABC/tab_summer2015
https://www.nxtbook.com/ygsreprints/AABC/g50853_aabc_spring2015
https://www.nxtbook.com/ygsreprints/AABC/g48663_aabc_winter2015
https://www.nxtbook.com/ygsreprints/AABC/g46741_aabc_fall2014
https://www.nxtbook.com/ygsreprints/AABC/g43965_aabc_summer2014
https://www.nxtbook.com/ygsreprints/AABC/g42323_aabc_spring2014
https://www.nxtbook.com/ygsreprints/AABC/g40447_aabc_winter2014
https://www.nxtbook.com/ygsreprints/AABC/g38793_aabc_fall2013
https://www.nxtbook.com/ygsreprints/AABC/g36202_aabc_summer2013
https://www.nxtbook.com/ygsreprints/AABC/g34728_aabc_tabspring2013
https://www.nxtbook.com/ygsreprints/AABC/g32884_aabc_tab-winter2013
https://www.nxtbook.com/ygsreprints/AABC/g30873_aabc_tabjournal_fall2012
https://www.nxtbook.com/ygsreprints/AABC/g28877_aabc_tabjournal_summer2012_2
https://www.nxtbook.com/ygsreprints/AABC/g25452aabc_tabspring12
https://www.nxtbook.com/ygsreprints/AABC/g23327aabc_fall_2011
https://www.nxtbook.com/ygsreprints/AABC/g21694aabc_summer11_final
https://www.nxtbook.com/ygsreprints/AABC/g19912nxtbk
https://www.nxtbook.com/ygsreprints/AABC/g19105_aabc_tabjournalwinter11
https://www.nxtbook.com/ygsreprints/AABC/AABC/p17871_aabc_fall10
https://www.nxtbook.com/ygsreprints/AABC/g16041aabc_tabjournal
https://www.nxtbookmedia.com