Marine fire and smoke dampers
Fire and smoke dampers are used in air conditioning and ventilation systems to prevent the spread of fire and smoke between fire zones, where people must have the maximum amount of time to react to possible fire. The dampers have been tested and approved for fitting to class A-60 divisions (bulkheads and decks), when suitably insulated (refer to insulation details).
Frame: AISI 316 stainless steel / galvanized steel.
Thickness: 1.2, 2 or 3 mm.
Blades: AISI 316 and AISI 430 options.
Sizes: 100x100 ~ 1000x1000 mm.
Circular connection pieces: 100 ~ 1000 mm.
The dampers can be used where the maximum system pressure is up to 1500 Pa and duct velocities are limited to 15m/s. The dampers are suitable for vertical and horizontal applications, with airflow in either direction. The dampers are normally open and failsafe to the closed position.
The dampers have two casings and blade options:
430 Stainless steel blades, galvanized steel casing - only suitable for installation in dry filtered systems.
316 Stainless steel blades, casing and drive - more suited for corrosive conditions, but even this will rapidly corrode and fail if not properly maintained, when used in air intake systems at sea. The addition of a mist eliminator is highly recommended and access must be provided for maintenance.