Our fire dampers have received ABS, BV, DNV, GL, LR, NK, KR, RS & RINA Type Approval and we have obtained EC Type examination certificate. Types of our fire dampers are: circular multi –blades with dia 300mm to 1800mm, circular single-blade with dia 100mm to 500mm, rectangular multi-blade with size 300x400mm to 1600x2000mm, rectangular single-blade with size 100x100mm to 500x700mm. All the fire dampers can be controlled manually, electrically, or pneumatically. They can also be controlled by electronic operated pneumatic methods. The fire dampers could be shut off automatically at once to prevent the fire spreading along air duct when it fired and the temperature in air duct got to more than 70 ⷪ C. Our air dampers are especially designed for sea environment, and widely used for navy vessels, off-shore platform and underground projects etc. The fire dampers could effectively hinder hydrosphere and fog in duct, and work well in this environment.