Hello Phong, No There are many systems with butterfly (butterball) valves in them. Just as long as it is supervised or locked open.
Monday, June 3, 2013, 9:10:36 PM, you wrote: > Dear All, > For one floor of a highrise tower, there is normally one > supervisory valve for the sprinklers of that floor. > Traditionally a supervisory gate valve is used but an UL/FM > supervisory butterfly valve is also manufactured at a cheaper price. > Does NFPA regulate to use which type of valve must be used? > Pros and con of each type? > Regards, > Le Vu Phong > Mobile: +84 (0) 902 363 525 > > phong_indochineengineering > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org -- Best regards, Charles mailto:[email protected] _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
