(Source: Nantong Maritime Micro Party Construction)
Ship ventilation systems (including air conditioning) while improving the ventilation conditions of the relevant premises. There is also a potential fire safety hazard as the conduit passes through fire-resistant compartments to other compartments. In the event of a fire, ventilation ducts leading to different compartments may become channels for conducting heat, smoke and even direct flame transmission.
Convention on ventilation system is put forward clear fire prevention requirements, in addition to the layout of ventilation system, catheter materials are required, and when the ventilation system of catheter (or casing) through the refractory when space, at the same time in the guarantee the segmentation of the integrity of the refractory, the larger area and special arrangement of the ventilation duct (or casing) set fire damper.
Definition and type of "fire brake"
Fire damper - an air valve that is placed in the ventilation duct to feel the temperature of the high temperature gas from the fire zone and automatically closes or can also be manually closed.
Fire damper has the following types: single leaf round fire damper, single leaf rectangular fire damper, multi-leaf round fire damper, multi-leaf rectangular fire damper.
Actuator mode: manual, electric, pneumatic, etc. The closing type of fire brake is set according to the different layout requirements of ventilation duct, and there are other special related marking provisions in different layout parts.
The role of a fire brake
When a fire occurs, close the fire damper installed on the ventilation duct (or casing) to isolate the combustion space from the outside world, cut off the access of air flow, prevent the spread of the fire, and prevent the influence of the smoke from the combustion on the outside world.
