If you need to protect your critical and valuable assets Clean Agent Suppression systems should be preffered. Clean Agent Suppression Systems are used in places where you will have high cost in case of fire. Room integrity is an important criteria for clean agent suppression systems and must be provided. Equipment in protected enclosure would never harmed in case of fire and you can continue to use equipment after discharge. Design standards are NFPA2001, EN15004 and ISO14520. System certification (not only equipment) acredited by international associations like UL, FM, LPCB, VdS is very important when using clean agent suppression systems.
Agents used for clean agent suppression systems are classified into two groups
A) Chemical Agents are chemical materials invented in laboratories. Most known types are HFC-227ea (FM-200), HFC-125 (Ecaro-25) and FK-5-1-12 (Novec1230).
B) Inert Gases are natural gases which are already in nature like Argon, Nitrogen and Carbondioxide. They can also be used as blends. There are four main types (IG-01, IG-55, IG-541, IG-100).
HFC-227ea is the most known and used type of clean agent suppression systems and belongs to hydrofloro carbon family. It is invented by DuPont and named as FM-200®. HFC-227ea is stored as liquid and pressurized with nitrogen within cylinder. Discharge time is 6 to 10 seconds. Agent transforms to gas form at nozzle and must be hold at room minimum 10 minutes.
Halon1301 agent was the most used agent for fire suppression systems till mid 90’s. However Halon1301 is banned at 1994 and alternatively HFC-125 is invented by DuPont. Advantage of HFC-125 is using same infrastructure with Halon1301, so no need to make any change with piping. HFC-125 is stored as liquid and pressurized with nitrogen within cylinder. Discharge time is 6 to 10 seconds. Agent transforms to gas form at nozzle and must be hold at room minimum 10 minutes.
FK-5-1-12 or known trademark name as Novec1230® belongs to fluorinated ketone chemical family. FK-5-1-12 has very low GDP value. FK-5-1-12 is stored as liquid and pressurized with nitrogen within cylinder. Discharge time is 6 to 10 seconds. Agent transforms to gas form at nozzle and must be hold at room minimum 10 minutes.
Inert gases are naturally occur in athmosphere and used for fire suppression systems. Argon, Nitrogen and Carbondioxide are used for fire suppression. Inert gases are incondensible and stored as gas within high pressure cylinders. Cylinders have 200bars or 300bars storage pressure; however this pressure is regulated within valve and decreased to lower value like 42bars. So pressure within pipes or within protected enclosure is never larger than this value. System discharge time for inert systems are 120 seconds. As pressure is high, long piping distances can be used; so cylinders can be stored in a separate room far from protected area. Also more than one enclosure can be protected with one inert system with using selector valves. Inert fire suppression systems are much more cost effective when protected room quantity increases.
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