·Fire class: A0、A30、A60；
·Designed as per the offshore environment, suitable for air conditioning and mechanical ventilation system with fire requirements
·When on fire, when the temp inside duct rises to 70℃, fire damper will auto close quickly to isolate the fire spreading
·It can prevent the moisture and fog penetrating and ensure normal work on offshore environment.
·Especially suitable for ships, offshore platforms and wet environment of underground engineering