Pneumatic Air Tubes

[CJ]

I am trying to find out some guidance on what should happen to the air tube within a building upon a fire alarm. i have been told that once all the samples have been delivered that it should automatically shut down about two minutes from when the fire alarm is activated.

Does anyone have any info or ideas on this?

[Colin Newman]

In a current PFI project the operation and fire precautions associated with the pneumatic transfer system were a source of great debate.  The outcome was that since the tube being used was self extinguishing pvc, each compartment boundary war provided with intumescent crush collars.  Each driver/blower unit is fitted with a high sensitivity smoke detector which shuts down the system when smoke is detected within the pneumatic transfer system.  There is no mechanism to ensuring that samples are delivered, it was considered that dealing with the fire incident was more important and the samples could be retrieved later.

Hope this helps.