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Library› Safety & LSA› Fixed Fire Suppression› Clean Agent System
Fixed Fire Suppression

Clean Agent System

Clean agent systems flood machinery or electrical spaces with FM-200 or Novec 1230, a gas that suppresses fire by absorbing heat and disrupting combustion, then evaporates without leaving the residue a foam wet-down or the cold shock a CO2 discharge would leave on switchgear.

5models 4manufacturers
Models

Models in this type.

The 5 models with the most complete data of 5 in Clean Agent System. Every row links to full specifications, documents and service notes.

KiddeFM-200 Marine variable KiddeFM-200 Clean Agent System 3MNovec 1230 Marine System variable FikeClean Agent Marine variable ChemoursNovec 1230 Clean Agent System
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Manufacturers.

All 4 manufacturers with models of Clean Agent System. Every name opens a search across the full library.

Related types

Also in Fixed Fire Suppression.

The other equipment types in this category.

CO2 Fire SuppressionCO2 Fixed Fire SystemDeluge/Sprinkler SystemDry Chemical SystemFM-200/Novec SystemFixed Gas Extinguishing SystemFoam Fire SuppressionFoam Fire SystemWater Mist SystemWater Mist System (Hi-Fog)
Knowledge

What to check on a Clean Agent System.

Clean agent systems protect spaces where the crew cannot tolerate a foam wet-down or a CO2 discharge's asphyxiation risk and cold shock to running equipment — server rooms, switchboard rooms, emergency generator enclosures, and increasingly battery rooms on hybrid tonnage. FM-200 (HFC-227ea) and Novec 1230 (a fluoroketone) both work by absorbing heat from the flame faster than combustion can regenerate it, rather than by displacing oxygen the way CO2 does. Design concentrations sit around 6-9% by volume for FM-200 and 4-6% for Novec 1230, both below the level that causes…

What sets clean agent apart from CO2 and foam

Clean agent systems protect spaces where the crew cannot tolerate a foam wet-down or a CO2 discharge's asphyxiation risk and cold shock to running equipment — server rooms, switchboard rooms, emergency generator enclosures, and increasingly battery rooms on hybrid tonnage. FM-200 (HFC-227ea) and Novec 1230 (a fluoroketone) both work by absorbing heat from the flame faster than combustion can regenerate it, rather than by displacing oxygen the way CO2 does. Design concentrations sit around 6-9% by volume for FM-200 and 4-6% for Novec 1230, both below the level that causes physiological harm to a person still in the space, which is the reason for choosing them over CO2 in occupied or semi-occupied compartments.

Clean agent fire suppression system
Flow schematic of a clean agent system from the cylinder bank and manifold, released by the detection and control panel, through distribution pipework to discharge nozzles flooding a protected machinery space.

Main components

Agent cylinders

Agent is stored as a liquefied gas under nitrogen superpressurisation, typically around 25 bar for FM-200, in cylinders sized to the protected volume. Cylinder banks are weighed or level-checked at survey, since a partially discharged cylinder looks externally identical to a full one.

Discharge nozzles and piping

Fixed piping distributes agent from the cylinder bank to nozzles sized and positioned to reach design concentration within about 10 seconds across the whole protected volume — a slower fill lets the fire regenerate faster than the agent can suppress it.

Detection and control panel

Cross-zoned smoke or flame detection triggers the release, usually with a manual abort station and a pre-discharge alarm giving personnel time to leave before the automatic release fires.

Room integrity

The protected space itself is part of the system — door closers, damper interlocks that shut ventilation on alarm, and cable/pipe penetration seals all have to hold the agent concentration for the hold time specified in the design, usually around 10 minutes.

Selection and sizing

Sizing is a room-volume calculation against the agent's design concentration, corrected for temperature. The factors a buyer checks:

  • Net protected volume including any fixed obstructions that reduce free volume
  • Room integrity test result (door fan test) confirming the space holds concentration for the hold time
  • Agent choice — Novec 1230 has a near-zero global warming potential against FM-200's higher GWP, increasingly relevant for newbuild specification
  • Cylinder location and temperature range, since agent pressure is temperature-dependent

Regulations and class

Fixed gas fire-extinguishing systems fall under SOLAS Ch. II-2 Reg. 10 and the FSS Code, which sets the technical requirements for equivalent alternatives to CO2 systems, including clean agent. Class surveys check cylinder weight or pressure at intervals set by the classification society, generally annually as part of the fire safety survey, plus a full system function test within the survey cycle. Because clean agent systems are approved as CO2 equivalents rather than a mandated system in their own right, the flag state's acceptance letter for the specific agent and design should be kept with the ship's fire control plan.

Typical faults

  • Cylinder pressure or weight loss from a slow valve seal leak — caught late, the room has no protection and nobody knows until survey or a real fire
  • Door or damper interlock defeated or left in manual override — agent discharges into a room that cannot hold concentration and leaks out before suppression completes
  • Detector heads fouled with dust in an engine room environment — false alarms lead crews to disable a zone rather than clean it, leaving the space unprotected
  • Penetration seals broken during cable work and never reinstated — same failure mode as the door interlock, harder to spot on a walk-through

What to look for in a supplier

  • FSS Code type approval for the specific agent and cylinder pressure, not a generic clean agent certificate
  • Ability to supply a room integrity (door fan) test report at handover, not just the hardware
  • Spare cylinder and valve availability matched to the ship's trading pattern — agent cylinders are not a shelf item in every port
  • Clear documentation of design concentration and hold time calculations for the surveyor's file

A clean agent cylinder that reads full on the gauge but has lost superpressurising nitrogen through a slow leak will still discharge — just not fast enough to reach design concentration, so pressure alone is not proof the bottle will do its job.

Search by manufacturer AFRISOWISKASwagelokAlfa Laval S.p.A.MAN Energy SolutionsSEIMIWärtsiläEndress+HauserABB MarineAlfa LavalMacGregorNovenco MarineCarrier MarineSiemens MarineHeinen & Hopman
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Frequently asked

Three things people ask first.

Is Clean Agent System data free?

Yes. Every model page, every guide and every datasheet for this type is readable without an account. An account adds saved searches and requests, nothing is taken away.

My model is missing — what now?

Send us the nameplate. We identify it by hand, add it to the library, and if you need a part or a service, the request is already on our desk.

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