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Exposure (Outside) Protection Sprin-klers are utilized to provide protection
from exposure fires on the outside of
buildings . The Issue A and B Window Type Exposure Protection Sprinklers are intended for spraying water on win-dow glazing at prescibed spacings and sprinkler locations at a minimum dis-charge pressure of 7 psi (0,48 bar).
– The smaller orifice Issue A Sprinklers are normally used where exposure is
light or moderate, the area of coverage is small, or where one horizontal line
of window sprinklers is installed at each floor. The larger orifice Issue B
Sprinklers are normally used where exposure is severe, or where one hori-zontal line of sprinklers is used to pro-tect windows at more than one floor level.
– It is recommended that the end user be consulted with respect to the suitability
of the materials of construction and finish for any given corrosive environ-ment. The effects of ambient tempera-ture, concentration of chemicals, and gas/chemical velocity, should be con-sidered, at a minimum, along with thecorrosive nature to which the sprin-klers may be exposed.
– The Issue A and B Window Type Ex-posure Protection Sprinklers are a re-designation for the Gem Issue A and