FIELD: fire safety.
SUBSTANCE: invention relates to fire-retarding casing with visual indicator. Proposed fire-retardant casing (202) comprises aperture (212) of visual indicator, collar (207), adjacent to aperture (212) of visual indicator, transparent panel (230) comprising outer edge (231) and perimeter (232), and fastener (236), configured to fix transparent panel (230) against collar (207). Area (264) of perimeter border interfacing between perimeter (232) of transparent panel (230) and internal surface (203) of fire-retardant casing (202) makes perimeter clearance, which does not exceed specified limit of fire-retardant clearance, and area (260) of edge border interfacing between outer edge (231) of transparent panel (230) and collar (207) makes edge clearance, which does not exceed specified limit of fire-retardant clearance.
EFFECT: technical result is achieving fire-retardant sealing of visual indicator glass panel with corresponding casing without gluing.
16 cl, 7 dwg
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