the worldwide use of high global warming agents.
SEVO Systems introduced the first UL Listed prod-
uct line designed with FK-5-1-12 at 25 bar
(360 psig). Since 2001, SEVO Systems has strived
to develop a "True Retrofit" system, that is, a
"One for One" cylinder replacement using existing
installed halon 1301 distribution piping. This is a
solution that meets four primary principles:
1 Replace agent supply with a 1 for 1 footprint,
2 Minimal distribution pipe modifications,
3 Replacement only of distribution nozzles,
4 A resultant system that meets the fire suppression
performance requirements by achieving the
required discharge time, minimum distribution
nozzle pressure and agent distribution per
current approvals, listings, and standards.
In each of the examples described above the
SEVO 1230 delivery system provided for the retrofit
of each manufacturer's halon 1301 equipment by
replacing the agent`s cylinder and nozzle only with
a minor revision of the initial pipe elevation. By
increasing the pressure of the storage cylinder from
25 bar to 34.5 bar (360 psig to 500 psig) the agent
flow rate is increased while maintaining the mini-
mum required average nozzle pressure in accord
with the system approval. The discharge time of 10
seconds is achieved using the existing halon 1301
distribution pipe network. More recently, major
halon installations have been designed for retrofit
with the SEVO 1230 "True Retrofit" System. The
same results have been achieved as described
above and only minimum piping distribution
adjustments have been necessary.
The low vapor pressure of the FK-5-1-12 fluid
can be utilized as a differentiating feature from
that of any other halon replacement, by super
pressurizing the agent storage cylinder with
nitrogen to 34.5 bar (500 psig); a "True Retrofit"
of a halon 1301 system with one using Novec
1230 fluid can be achieved.
The key innovation is the use of the standard
welded 500 D.O.T/T.C low pressure cylinder. SEVO
is utilizing the low vapor pressure of the Novec
1230 fluid, which allows for safe use in welded
cylinders at elevated pressure to achieve the "True
Retrofit".
Summary
The retrofit of existing halon 1301 total flooding
system is now possible while using the existing
halon pipe network. Delivering the agent quantity,
achieving the design concentrations at the
approved/listed nozzle pressure within the allowed
discharge time of 10 seconds for FK-5-1-12 is now
possible. This innovative development offers the
first "One for One" halon 1301 "True Retrofit"
solution. The SEVO 1230 "One for One" system
allows for employing existing halon 1301 pipe
networks while using the preferred second
generation fluid reducing the overall cost and
downtime of retrofit.
SEVO is a trademark of SEVO Systems, Inc. 3M and Novec are
trademarks of 3M. Other trademarks or names may be the
property of their owners.
IFP
40 INTERNATIONAL FIRE PROTECTION
SEVO 1230 "TRUE RETROFIT", "ONE FOR ONE" SYSTEM
NOVECTM 1230

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