Indirect Low Pressure Fire Suppression System for Server Racks

By Fire Engineering Technology

Indirect Low Pressure Fire Suppression System for Server Racks

The Indirect Low Pressure (ILP) Fire Suppression System for Server Racks provides fast, automatic, and damage-free fire protection for high-value IT and data center infrastructure. This system uses clean agent fire suppression technology combined with advanced heat detection, ensuring early fire suppression directly at the source.

In an ILP fire suppression system, the extinguishing agent such as Novec 1230, FM-200, or CO2 is stored in a low-pressure cylinder and released indirectly through discharge nozzles upon activation. Fire detection is achieved using Linear Heat Sensing (LHS) cable, smoke detectors, or heat detectors installed inside the server rack. When abnormal temperature rise or smoke is detected, the system triggers immediate agent discharge inside the rack enclosure.

The server rack ILP fire suppression system effectively suppresses Class A, B, and C fires without water, residue, or harm to sensitive electronics. Designed as per NFPA-2001, BIS, and ISO standards, it is ideal for data centers, server rooms, network racks, UPS cabinets, telecom racks, and control rooms, ensuring minimal downtime, high reliability, and continuous business operation.

What Is an Indirect Low Pressure Fire Suppression System?

Unlike the direct system where the tube itself bursts and releases the agent, the Indirect Low Pressure (ILP) system uses the heat-sensing tube only for fire detection, not for agent discharge.

How It Works:

• The tube detects the fire by bursting at the hottest point.

• Instead of releasing the agent through the tube, the rupture activates a separate nozzle network.

• The agent is discharged through pre-engineered nozzles, ensuring uniform suppression across the entire rack.

This makes the ILP system ideal when you require broader coverage, multi-rack protection, or precise agent flow control.

How ILP System Works Inside a Server Rack

1. Detection via Polymer Tube
   A heat-sensing tube runs throughout the rack. When fire temperature reaches ~150–180°C, the tube bursts.

2. System Activation
   The burst causes a pressure drop inside the system, triggering the valve mechanism of the agent cylinder.

3. Agent Release Through Nozzles
   The extinguisher agent flows through dedicated stainless-steel nozzles positioned inside the server rack.

4. Total Flooding Inside the Rack
   The entire internal space of the rack is filled with clean agent, extinguishing the fire in seconds.

This method ensures complete enclosure protection, making ILP suitable for larger or complex rack layouts.

Compatible Suppression Agents

Fire Engineering Technology offers multiple safe and effective agents:

• FK-5-1-12 (Novec Equivalent) – Ideal for IT hardware, leaves no residue

• HFC-227ea – Widely used clean agent for critical electronics

• CO2 – For non-occupied, enclosed electrical spaces

• Inert Gases (Optional) – For special applications

All are non-conductive, equipment-safe, and environment-friendly.

Key Features of ILP Fire Suppression System for Server Racks

• Advanced indirect discharge technology

• Instant detection through heat-sensing tube

• Clean agent total flooding inside the rack

• Does not release agent from the tube (safer and controlled)

• No power or electronics required for activation

• No false alarms or maintenance-heavy sensors

• Fully automatic & self-contained

• Uniform agent distribution across the rack

• Highly reliable for high-value IT infrastructure

Applications

• Data center server cabinets

• Network & telecom racks

• Edge computing enclosures

• Cloud storage racks

• UPS & battery backup racks

• Modular IT racks

• Sensitive electronics & switching racks

Benefits of ILP System in Data Center Server Racks

• Broader suppression coverage than direct systems

• Protects high-density racks and multi-rack clusters

• Keeps IT equipment safe from fire and smoke

• Reduces downtime and operational losses

• No residue or cleanup required

• Long-term reliable protection with minimal maintenance

• Compatible with small, medium, and large server enclosures

Why Choose Fire Engineering Technology?

Fire Engineering Technology is a leader in automatic tubing-based fire suppression systems, offering both DLP and ILP solutions.
Our systems are engineered with UL-approved tubing, precision nozzles, high-quality cylinders, and reliable clean agents—ensuring unmatched performance in critical IT environments.

We provide:

• Custom design for every rack

• Quick installation with no downtime

• 24×7 service and AMC support

• Industry-best quality and durability