Fire pneumatic valve structure and function is what

what fire pneumatic valve structure and function is
on the air conditioning system of air duct, installation of fire when the fire is the purpose of the pneumatic valve can quickly cut off the airflow conveying, to prevent the fire spreading. Fire a diagram of pneumatic valve, when there is a fire, air duct are influenced by ambient temperature and elevated temperature, when the fire had reached a certain temperature in the air duct, fusible piece fuse, the original the pneumatic valve plate connected by the fusible piece immediately with fusible release and closed to prevent air flow. In order to stop continue to supply air to the system, fire prevention pneumatic valve installed on the electrical signal and interlocks, pneumatic valve plate can make the signal when closing, the fan to stop running.
fire pneumatic valve installation position:
( ） Air conditioning equipment ( Fresh air units, air conditioning units, etc. ) Outlet air distribution on the main duct.
　　（ ） Air duct through the fire partition.
　　（ ） Air duct through the structure of telescopic settlement joint.
　　（ ） Air duct in unavoidable circumstances, through the combustible workshop or the room.
fire pneumatic valve can be divided into weight of leaf type, fire control pneumatic valve type, can be manually reset, the fusible piece of the action of temperature for ℃.