Fixed Suppression Systems

Automatic fire suppression systems are usually installed in high risk environments or to protect areas of significant importance such as computer rooms.

Typically, these systems comprise a “Fire Detection” element and an automatic extinguishant element. Fire detection is installed throughout the protected area and the Detection Control Panel is interfaced with the extinguishant system to trigger an automatic discharge of extinguishant gas under the appropriate conditions.

Systems are usually configured to operate on the “double knock” principle which requires the activation of at least two fire detectors before the extinguishant is released.

There are three common extinguishants as follows:

1. FM200

FM200 is widely used in computer rooms and is a very effective extinguishant which vaporises following discharge causing minimal damage to systems/equipment it comes in contact with. FM-200 is the world’s most widely selected clean agent for use in new applications and as a Halon 1301 replacement. It is suitable for use in a wide range of fire extinguishing applications, including total flooding, streaming, and inerting applications. FM-200 is a safe, clean, and electrically nonconductive agent that protects people, high value assets and the continuity of business operations.

2. Novec

Based on a proprietary chemistry from 3M, Novec 1230 fluid addresses industry needs for clean agent fire protection that is safe and effective, while offering an environmental profile that other halocarbon agents like HFCs can’t begin to match:

– Zero ozone depletion potential
– 5-day atmospheric lifetime
– Global warming potential of 1

Because of this, Novec 1230 fluid – unlike HFCs – is not targeted for phase-down or regulatory restrictions anywhere in the world. And it is approved for use in total flooding fire suppression systems by the U.S. EPA and most major regulatory bodies around the world. All of this makes Novec 1230 fluid today’s sustainable choice for clean agent fire protection.

3. CO2

CO2 is usually used in plant areas and is a lower cost alternative. CO2 cannot be used to protect sophisticated electrical equipment as it can cause thermal shock.

Room Integrity Testing

It is imperative that the protected area is airtight prior to discharge of the extinguishant. Any openings must automatically seal prior to discharge of the gas. The protected enclosure should be subjected to a room integrity test which involves pressurisation using a computer controlled fan system which detects leakage in the room.

Fixfire offers Room Integrity Testing at commissioning stage and on an on-going basis following installation.