srinivasarao manikyala

Dear All,
Thank you very much for restarting the discssion.
Requesting other members to come forward with some more inputs.
@ Dipil,
You presentation has detailed information thank you very much.
@ Raghu and Kanathan,
Based on the discussion with one of my coleague, working in this HVAC systems, many buildings not provided with sensors inside the ducts, even they have Fire alam system. If sensors not provided in the ducts,. The fire dampers will be provided with lead at the springs, this is purely mechanical system. IThis lead will melt at high temperatures and then the fire dampers will close. Normally in most of the fire cases smoke is the problem and many times fire will not reach upto the dampers then these dampers will not close.
please comment on my inputs.

From India, Hyderabad

Dear Raghu, Nathan & SRM
Thanks for your detailed explanation on HVAC system and the safety arrangements one suppose to ensure in these ducts...
I have discussed this case with our Technical people who were dealing with HVAC system... We do have Package AC System and VRS System... In both the system we are having dampers which are operating manually... Auto sensing dampers are not compulsory and not been installed in our system...
Can anyone come up with the requirement of auto cut off dampers in AC Ducts in any rules/act? If so based on that I can put up the proposal to my management for modifying our existing system...
If anyone come with some kind of drawing of a safe HVAC ducting system it will be of great help... Hope to get more technical inputs on this front...
Thanks in advance...

From India
raghuvaran chakkaravarthy

Dear Bhaskar,
Thanks for your inputs. Keep on encouraging us.
Dear Srinivasa Rao,
You add a valid point from your side regarding our discussion. Thanks for your input.
See the attached NFPA and other international codes for INSPECTION CODES of FIRE AND SMOKE DAMPER for your use.

From United States, Fpo

Attached Files (Download Requires Membership)
File Type: pdf FIRE AND SMOKE DAMPER INSPECTION CODES.pdf (49.6 KB, 312 views)

Dear Dipil kumar,
Fire / Smoke dampers will not be installed in small units like package, VRS, Split systems, These systems will be installed for huge centerilised system, but there is possibilities for installation for small systems, but due to cost restraint no one will recommend. Nowadays it is a practice for all LEED certified green projects.
Click the link below so u can get some informations
Fire Control Dampers, Volume Control Dampers, Fire Dampers, High Torque Rotary Actuators, Linear Actuators, Multiturn Actuators, Pneumatic Rotary Actuators, Electrohydraulic Actuatrors, Actuated Valves, Mumbai, India

From China, Shanghai
Plz find the attached presentation, may be easy to understand about fire / smoke dampers.
From China, Shanghai

Attached Files (Download Requires Membership)
File Type: ppt Basic_FS_Training_Presentation.ppt (1.97 MB, 325 views)

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