This is a 13’ diameter inflatable bulkhead showing a closed access door and vent hole
The access door measures 72” high x 36” wide. The vent hole measures 16” diameter
In order to protect the interior walls of the 72” x 36” opening, an interior wood frame was constructed as shown.
Here it is installed in the service water line with the access door closed. The strings are attached to the deflation zippers that when pulled, will quickly deflate the balloon.
Three of the five bulkheads supplied on this project were 13’ diameter with no access doors or vent holes as shown above. Leak-by the inflatable bulkhead was measured at .01 CFM, which was a tremendous improvement versus the wood frame and plastic sheeting methods used previously. Complete project details were profiled in the Focus on O&M Section of the November 2007 issue of Power Magazine (Volume 151, Issue 11).
Copyright 2010 by G.R. Werth & Associates, Inc. - All rights reserved
Duct Balloon
Inflatable Isolation Barriers
