Concealed Sprinklers – 830 and 831

● The Series LF830,LF831, 5.6 K-factor, flat plate concealed pendent
Sprinklers, standard coverage. Described in this data sheet LF830 is
standard response, 5mm glass bulb type sprinkler; LF831 is quick
response, 3mm glass bulb type sprinkler.

● The soldered cover plate drops off the retainer assembly when
exposed to heat, as from a fire, that has reached the plate’s Listed
temperature rating exposing the sprinkler above. As heat
encompasses the glass bulb operating element of the sprinkler,
the fluid in the bulb expands, compressing the air bubble within the
bulb. When the air bubble can no longer compress, the fluid
expansion causes breakage of the glass bulb, resulting in
release of the water seat assembly, and discharge of water from
the sprinkler