Duct Balloon®
Inflatable Isolation Barriers -
This Duct Balloon® measured 25’4” (7.72m) wide x 12’0” (3.65m) high x 3’0” (.9m) deep and is used during maintenance of the units FGD system. The door opening was designed to accommodate a standard pre hung door assembly that measured about 6’8” (2m) high x 3’0” (.9m) wide.
This special shape was also supplied with three 12” (304mm) diameter access holes with covers that can be used for running supply lines through the Duct Balloon® while it is fully inflated.
Another requirement was that this Duct Balloon® be supplied with two 120V/60 high pressure blowers to provide redundancy in case of loss of power to one of the blowers.
Due to some natural draft in the duct work, a simple scaffold structure was assembled on both sides of the Duct Balloon® to keep it in place before inflation
Once the scaffold was installed the Duct Balloon® was fully inflated in less than five minutes
The Duct Balloon® sealed completely around the door opening to prevent sources of ignition from migrating to the opposite side where weld repairs were being made.
Note: This project was profiled in the September 2008 Issue of Power Magazine and can be viewed by clicking here
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