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ProInert2 Inert Gas Fire Suppression

ProInert2 is an inert gas, total flooding fire suppression system from Fike, engineered and supported by Suppression Systems, Inc. (SSI) for high value, mission critical rooms where water damage and cleanup are not acceptable.

Who this is for: facility managers, engineers, EHS, IT and data center leaders, and decision makers who need reliable suppression for critical rooms, and want a non halocarbon option that aligns with long term environmental strategy.

Talk to an SSI specialist: call 1-800-360-0687 or (610) 709-5000, or use our contact form.

If you want a fast budgetary estimate, send room dimensions, ceiling height, any raised floor or drop ceiling details, and whether the space is normally occupied.

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Quick Facts At a Glance

  • Agent type: inert gas blends, IG-55 and IG-541 (argon and nitrogen, IG-541 also includes a small amount of carbon dioxide).
  • Primary use: total flooding protection for enclosed critical rooms where water damage, residue, and downtime are unacceptable.
  • Key differentiator: patented constant flow valve designed to keep discharge flow steady, rather than a high initial pressure spike.
  • Environmental profile: zero ozone depletion potential, effectively zero global warming potential, and no atmospheric lifetime concerns for the agent itself.
  • Components and compliance: UL listed and FM approved components when designed and installed per manufacturer guidance and applicable standards.
  • SSI scope: engineered design, installation, integration, inspection, testing, maintenance, and post discharge support.
ProInert2 IG-55 inert gas cylinder bank protecting a critical room

ProInert2 cylinder bank, designed to protect high value electronics with inert gas instead of water.

What ProInert2 Is

ProInert2 is a total flooding inert gas fire suppression system that uses naturally occurring gases, not synthetic chemical clean agents, to suppress fire in enclosed hazards. The agent discharges as a gas, leaves no residue, and is commonly selected for normally occupied critical rooms when engineered to current safety and design guidance.

IG-55 and IG-541 gas blends

  • IG-55: 50 percent argon, 50 percent nitrogen.
  • IG-541: blend of nitrogen, argon, and about 8 percent carbon dioxide, often referenced in literature as an Inergen equivalent blend.

SSI helps you choose the right agent blend based on hazard class, room volume, nozzle layout constraints, occupancy considerations, and AHJ expectations, then completes the engineered design and installation.

ProInert2 is part of SSI’s clean agent suppression portfolio, and is often evaluated side by side with SF-1230 / FK-5-1-12, ECARO-25, and FM-200, depending on footprint, discharge time needs, and long term regulatory strategy.

How It Works

Inert gas suppression works by reducing oxygen concentration and absorbing heat in the flame zone. The goal is to stop combustion while maintaining residual oxygen levels and exposure limits consistent with accepted guidance for normally occupied spaces, with prompt evacuation after discharge.

  • The agent reaches under raised floors, above ceilings, and within equipment voids because it distributes as a gas.
  • No residue is left behind, cleanup is minimized compared to water or powders.
  • System performance depends on engineered distribution, enclosure integrity, and correct integration with detection and control.

The constant flow advantage

Traditional inert gas systems can create a sharp room pressure peak due to high initial discharge pressure. ProInert2 uses a patented constant flow valve to shape the discharge profile and hold outlet pressure steady during discharge.

  • Smoother pressure rise, which can simplify pressure relief venting design and reduce building impacts.
  • In many layouts, controlled flow supports more flexible cylinder placement and longer pipe runs when engineered to manufacturer calculations.
  • High pressure storage (up to 300 bar) can reduce cylinder count and footprint compared to legacy lower pressure inert gas systems, depending on the hazard.
ProInert2 constant flow valve illustration showing steady pressure during discharge

ProInert2 constant flow concept illustration. If your browser blocks this image, open it directly: view image.

Data center acoustics and hard drive considerations

Discharge noise can matter in dense data environments, especially where hard disk drives are present. SSI designs inert gas systems with discharge profile, nozzle placement, and room layout in mind, and we can review available industry resources during design.

Requirements and Code Notes

Inert gas suppression succeeds or fails on engineering details, enclosure integrity, and correct sequencing with detection, alarms, and building systems. SSI designs systems to applicable standards and coordinates requirements with the AHJ, insurer, and your internal stakeholders.

Common standards and authoritative references