... Concealed fire sprinkler, fire sprinkler, fire safety. 1, senstive, reliable operation, fast response 2.corrosion resistance ZS model Fire sprinkler ... fast, reliable and sensitive. Technical Parameter Sprinkler threaded and flow characterNominal DiameterConnecting threadedFlow CoefficientK15mm, ... R1/280±420mm,3/4inchR3/4115±6 Sprinkler modelZSTZ15-57ZSTZ15-68ZSTZ15-79ZSTZ15-93ZSTZ15-141ZSTZ15-182Rated ...