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Ships within 48 hours · Estimated delivery Aug 31 - Sep 5
accepts 6"-16" collar (collar by others)
T-Bar Fixed Core Step Down Diffuser
Countersunk mounting holes for flush appearance with stainless sheet metal screws
425 Series Engineering/Performance Data
Standard Features * Round 1-1/2 hour fire damper * Horizontal or Vertical installation * UL and California State Fire Marshall approved * Damper construction meets NFPA 90A requirements * Stainless steel curtain * 16 gauge steel frame * UL listed fusible link
Parallel Volume Damper Low Leak 3000PLL-72X66 Smoke-Fire Damper accepts 6"-16" collar (collar byh3. Standard Features * 16 gauge galvanized channel frame * Parallel blades are cee stiffened 16 gauge galvanized for strength and stability * Blades pivot on non metallic celcon bushings * 1 2" square zinc plated steel pivot pins * 1 2" square zinc plated steel adjustable operating shaft extending up to 4" beyond the air control frame * Single blades on dampers with a height of 12" or less * Mill finish h3. Options * 3000 PLL Low Leak Air Control
