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Dampers AC

Dampers AC

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:

  1. 430 Stainless steel blades, galvanized steel casing - only suitable for installation in dry filtered systems.
  2. 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.

Air control and shut-off dampers

Air control and shut-off dampers control the airflow or shut off airflow in ductwork where tightness, thermal insulation and reliability are important. The dampers meet international standards for both rectangular and circular ducts and the leakage class is accordance with the EN1751 standards.

Frame: AISI 316 stainless steel / galvanized steel.
Thickness: 1.5 mm.
Blades: AISI 316 stainless steel.
Sizes: 100x100 ~ 1200x1200 mm at 50 mm intervals.
Operation system: electrical, pneumatic or manual.

The dampers can be used where the maximum duct pressure is up to 1000 Pa and duct velocities are limited to 10m/s.


The dampers can be controlled electrically, pneumatically or manually. In case of fire, the fire and gas dampers will close automatically. The electrically and pneumatically controlled dampers are driven by an actuator.

  • Belimo actuator: standard actuator
  • Schischek actuator: actuator used in explosion-proof areas or if the actuator must open/close within 3 sec./90°C.

More information about Dampers AC

Don’t hesitate to contact us for more information about our Dampers AC. Our skilled engineers are eager to explain the possibilities for your vessel or structure.

Download the Dampers AC brochure for detailed information and technical specifications.

Our working method

Each project is a unique combination of improvisation and routine. There is only one thing that all the projects have in common: the main processing, all the way from initial inquiry to after-sales care:

Working method


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