Each cylinder head discharge valve assembly must be fitted with a bursting disc designed to rupture at a pressure of between 177 and 193 bar. The arrangements should permit the free escape of gas from a cylinder when the bursting disc is ruptured but not allowed to depress the oxygen level
in the CO2 room. Bursting discs which do not release gas into the discharge manifold should be piped to open air and not allowed to vent into the room.
Non-return valves should be provided at the discharge manifold to allow any cylinder or flexible discharge pipe to be disconnected without affecting the use of other cylinders in the system and to reduce the risk of a discharge to the CO2 cylinder storage room when the system is put into operation to smother a fire.
Cylinder head discharge valves, if arranged for remote release should preferably be capable of being opened manually in the event of malfunction of the remote release system
in the CO2 room. Bursting discs which do not release gas into the discharge manifold should be piped to open air and not allowed to vent into the room.
Non-return valves should be provided at the discharge manifold to allow any cylinder or flexible discharge pipe to be disconnected without affecting the use of other cylinders in the system and to reduce the risk of a discharge to the CO2 cylinder storage room when the system is put into operation to smother a fire.
Cylinder head discharge valves, if arranged for remote release should preferably be capable of being opened manually in the event of malfunction of the remote release system
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