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Clean Agent Nozzle spacing

Clean Agent Nozzle spacing

Clean Agent Nozzle spacing

(OP)
What is usual spacing of clean agent nozzle with a standard orifice diameter?

RE: Clean Agent Nozzle spacing

not a clean agent expert but 1. have to hit concentration 2. install per manufacture

if you are thinking spacing criteria like for sprinkler heads, have never seen that.  

RE: Clean Agent Nozzle spacing

Spacing shall be in accordance with its listing.

RE: Clean Agent Nozzle spacing

Nozzle spacing is based on calculations performed by the manufacturer's software.  There is not a standard (like 13) that can be used for clean agent.  You must meet concentration and discharge distances when designing.

There is not any "standard" oriface diameters that I am aware of.

RE: Clean Agent Nozzle spacing

(OP)
Thanks for suggestions guys, does anyone has a flow calculation software that can be shared to me?

RE: Clean Agent Nozzle spacing

Which agent?

RE: Clean Agent Nozzle spacing

(OP)
IG55 and Inergen

RE: Clean Agent Nozzle spacing

Check NFPA 2001 and the nozzle listing data. Your lack of design information limits our ability to help you.

RE: Clean Agent Nozzle spacing

There is no standard orifice for clean agent nozzles.  They are sized according to the calculation program specific to that agent.  The basic nozzle size matches the pipe size as determined by the program and the orifice sizes are custom drilled to meet the calculation results.

As mentioned previously the number of nozzles is determined by the listed coverage per nozzle.  What you have to watch though is areas with suspended ceilings.  If the coverage is ok with one nozzle you may very easily "overpressurize" the area in the vicinity of the nozzle and blow out tiles.  To retain ceiling tile in place, and thus retain the agent, you generally have to spread out the discharge to more nozzles.  I don't think the manufacturer design manuals tell you this.

RE: Clean Agent Nozzle spacing

KCfpe is correct except I might add that a room has to pass 'room integrity testing'. Ceiling tiles coming out is not an option and they must be pinned in place. A system isn't designed to compensate for tiles blowing out.

Regards
Dave

RE: Clean Agent Nozzle spacing

(OP)
I appreciated all the tips and suggestions. I will ask my friends ,If they can lend NFPA 2001 book.

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