Cooper B-Line

Accessories: i-REM Data and Fire Protection

Concentration of Extinguishant - FM200 in Enclosures

50630 Calculations of Volume filled with specified quanitity of FM200 (Fire Extinguishant) at various concentrations and temperatures.

The most critical aspect of the specification for protection of your Cabinet from the damage of Smoke & Fire is to determine the “free volume” of your cabinet and its “leakage”.

Rack-free volume.

This is the reduced cabinet volume after solid metal and airtight enclosures are subtracted.

Leakage is caused by:

  • Unnecessary leakage from leaving gaps, e.g. around cable inlets at the base of the rack.
  • Necessary ventilation to provide enough air flow to cool the electronic equipment, usually computers.

FM200 is heavier than air and drops down the cabinet and will leak out of any unsealed gaps around the lower cable enteries.

Specify the weight of Extinguishant to achieve concentration of 7% minimum in the protected enclosure.

FM200 Base Data*A* NFPA2001
Temp
S.V.V.*1
Kgs per m3 at % concentrations of HFC-277ea
ºC
m3/kg
6%
7%
8%
9%
10%
-5
0.1241
 0.5142 0.6064 0.7005 0.7987 0.8951
0
0.1268
 0.5034 0.5936 0.6858 0.78 0.8763
+5
0.1294
 0.4932 0.5816 0.6719 0.7642 0.8586
+10
0.1321
 0.4834 0.57 0.6585 0.749 0.8414
+15
0.1347
 0.474 0.5589 0.6457 0.7344 0.8251
+20
0.1373
 0.465 0.5483 0.6335 0.7205 0.8094
+25
0.1399
 0.4564 0.5382 0.6217 0.7071 0.7944
             
*1 Specific Vapor Volume
 
 
Cabinet Volumes*B
Cabinet Concentration*C
with 800grms @ 20ºC
with 1000grms @ 20ºC
Height U 39U 42U 47U 39U 42U 47U 39U 42U 47U
Height Mtr. 1.9 2.0 2.2 1.9 2.0 2.2 1.9 2.0 2.2
  Volume m3 of Cabinets % Concentration @ 20ºC % Concentration @ 20ºC
6x6 Rack 0.68 0.72 0.79 16.01% 15.21% 13.83% 20.06% 19.06% 17.32%
6x8 Rack 0.91 0.96 1.06 12.01% 11.41% 10.37% 15.04% 14.29% 12.99%
6x10 Rack 1.14 1.20 1.32 9.61% 9.13% 8.30% 12.04% 11.43% 10.39%
8x6 Rack 0.91 0.96 1.06 9.00% 8.55% 7.78% 11.28% 10.72% 9.74%
8x8 Rack 1.22 1.28 1.41 7.20% 6.84% 6.22% 9.03% 8.68% 7.80%
8x10 Rack 1.52 1.60 1.76 7.20% 6.84% 6.22% 9.03% 8.68% 7.80%
8x12 Rack 1.82 1.92 2.11 6.00% 5.70% 5.18% 7.52% 7.15% 6.50%
 
 
Canister
with 800grms of FM200
with 1000grms of FM200
Temp
M3 filled at % concentration
M3 filled at % concentration
ºC
7%
8%
9%
10%
7%
8%
9%
10%
-5 1.32 1.14

1.00

 0.89 1.65 1.43 1.25 1.12
0 1.35 1.17 1.03 0.91 1.68 1.48 1.28 1.14
+5 1.38 1.19 1.05 0.93 1.72 1.49 1.31 1.16
+10 1.40 1.21 1.07 0.96 1.75 1.52 1.34 1.19
+15 1.43 1.24 1.09 0.97 1.79 1.55 1.36 1.21
+20 1.46 1.26 1.11 0.99 1.82 1.58 1.39 1.24
+25 1.49 1.29 1.13 1.01 1.86 1.61 1.41 1.26
 
 
Extinguishants

FM200, FE227, (HFC-227ea). Worlds most widely used safe-inkind replacement for Halon 1301. Boils at -16ºC. Has zero ozone depleting potential. It is safe clean and electrically non-conducting so virtually eliminating collateral damage to computing and other delicate electronic equipment.

*A Data from NFPA 2001 Standard on Clean Agent Fire Extinguising Systems
*B No consideration for installed Equipment
*C Concentration of Extinguishment in enclosure will increase with rise in temperature