An expansion tank (actually 13 calls it a chamber) is also listed. I have not asked UL or looked at the test protocols but it is reasonable to assume though similar that there are some differences. For instance the expansion chamber is tested for chemical compatibility with antifreeze compounds that may not be applied to the surge suppressor. Both are a tank with a diaphragm, but the inlet size differs greatly. The surge suppressors must capture part of a pressure wave (operating in milliseconds) so large opening whereas the expansion chamber captures thermal expansion over seasonal changes (operating in lets call it 6 months) so small opening.
I’ve played with sizing expansion chambers but not surge suppressors. I ASSUME that the suppressor is usually larger. Someone out there want to chime-in on sizing? Roland Roland Huggins, PE - VP Engineering American Fire Sprinkler Assn. --- Fire Sprinklers Saves Lives Dallas, TX http://www.firesprinkler.org On Jul 31, 2014, at 3:57 AM, Cahill, Christopher <[email protected]> wrote: > A surge suppressor is a UL Listed fire protection device for this purpose. > An expansion tank is something used in plumbing or mechanical systems to > account for expansion in volume usually do to change in temperature. Maybe > not the most technical definition as both are pretty much the same > technology, a tank with a diaphragm that creates an air pocket that will > compress to allow increase in pressure/volume of the liquid. That's how I'd > describe the two, so really let's just say it's a Listing ($$$$) thing. _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
