Special application control sprinkler for use in fire protection

An array of at least two low pressure, large drop sprinklers for use in protection of at least extra hazard and high piled storage occupancies and adapted to be arrayed such that the coverage of each sprinkler is in a range of greater than 80 square feet and less than 200 square feet wherein each sprinkler includes a generally tubular body having an inlet end and an opposing end with an internal passageway there between;

• a deflector coupled with the tubular body and spaced from and generally in line with the discharge end of the internal passageway so as to be impacted by the flow of water issuing from the discharge end of the passageway upon activation of the sprinkler;
• a closure releasably positioned at the discharge end of the tubular body so as to close the internal passageway;
• and
• a heat responsive trigger mounted to releasably retain the closure at the discharge end of the tubular body characterized in that:
• the sprinkler has a K factor greater than 16 and less than 40;
• and
• the deflector having a series of solid and open areas, with the solid areas being adapted upon release of water in the range of 7 psi-50 psi to disperse the flow of water outwardly such that it will, when descending from a ceiling height of 25 feet or greater, cover an area of greater than 80 square feet and less than 200 square feet when the water is located at a height with respect to a fire to control the same within at least the 1999 Edition guidelines of NFPA 13, and whereas the sprinklers are spaced apart a distance such that sufficient heat to actuate the trigger of one sprinkler will actuate the trigger on at least one adjacent sprinkler.