Tube-Based Fire Suppression Systems

Most electrical fires don’t start in the open. They start inside a panel, behind a closed door, in a loose connection or an overloaded busbar, and they’re well established before anyone in the building smells smoke. By the time a room-flooding system or a sprinkler reacts, the panel is already gone, and often the fire has spread past it.

A tube-based fire suppression system fixes that by sitting inside the enclosure itself. It detects and puts out the fire at the exact point it starts, in seconds, with no power supply and nobody in the room.

Zap Fire designs, supplies, installs and maintains tube-based suppression for electrical panels, machinery and critical enclosures, including KANEX systems. We’re headquartered in Gurugram and we service clients across India. We’ve done this since 2008, and we cover the whole job, from sizing the agent to the enclosure through to the annual pressure checks that keep it ready. 

How a tube-based system works

How a tube-based system works

At the heart of the system is a heat-sensitive polymer tube, run through the inside of the enclosure and pressurised with the extinguishing agent or with nitrogen. The tube is the detector. When a fire pushes the temperature to around 110 to 180 degrees Celsius, the tube bursts at the single hottest point, which is exactly where the fire is.

That burst either releases the agent straight through the tube onto the fire, or signals the cylinder valve to discharge through fixed nozzles. Either way it happens on its own, with no electrical supply and no human action. The agent is a non-conductive clean gas or CO2, so it puts the fire out without harming the equipment around it.

Because the tube reacts to the heat of the fire itself rather than to smoke drifting up to a ceiling detector, it acts far earlier than a room system ever could. The fire is caught inside the enclosure, often before it trips a breaker, and the equipment around it never feels the effect.

Direct and indirect systems

There are two ways to configure the system, depending on the size of what you’re protecting:

We pick the configuration around the enclosure, then size the cylinder to its volume. A single control panel might need a short run of tube and a small cylinder, while a CNC machine or a switchroom needs nozzles and a larger charge. We size both to the space rather than to a standard kit.

Direct

The tube is both the detector and the nozzle. It bursts and discharges the agent right at the hot spot. Compact, and ideal for small enclosures like a single electrical panel or a control cabinet.

Indirect

The tube detects and triggers the cylinder, which discharges through separate nozzles to flood the whole enclosure. Suited to larger spaces like a big switchroom, a CNC machine or a generator canopy.

Indirect Systems

Most electrical fires start inside a panel, in the dark, with nobody watching. A tube-based system fights it there, the second it starts. Let Zap Fire fit one to your panels

The agents we use

We build the system around the agent that suits the risk and the equipment: Water and dry powder have no place inside live equipment, which is why we stay with clean agents and CO2 for these enclosures.

NOVEC 1230 (FK-5-1-12)

A clean agent that knocks the fire down fast and leaves no residue, safe for live electronics.

FM-200 (HFC-227ea)

A compact halocarbon clean agent for fast suppression inside tight enclosures.

CO2

A cost-effective option for unoccupied enclosures, putting the fire out by removing oxygen.

Services we provide

Tube-based suppression is precise, low-fuss protection, and we cover every stage of it with our own technicians.

A panel without suppression is a fire waiting for a power cut. Zap Fire fits and maintains tube-based systems that don’t need power to do their job

Design and engineering
Enclosure assessment, tube routing and direct or indirect suppression system selection developed as detailed drawings.
Hydraulic and flow calculations
Agent quantity, tube layout and nozzle sizing calculated according to enclosure volume and fire hazard requirements.
Supply and procurement
Supply of cylinders, UL-listed detection tubes, clean agents and valves, including KANEX suppression systems.
Installation and execution
Professional installation of cylinders and tube routing through protected enclosures by trained technicians.
Testing and commissioning
Tube pressurisation, leak testing, pressure gauge checks and system actuation verification before final handover.
Programming and integration
Integration of pressure-switch outputs with fire alarm systems or BMS, including equipment shutdown during discharge.
Retrofitting and modernisation
Installation of suppression protection in existing electrical panels and machinery without complete replacement.
Preventive maintenance
Scheduled pressure checks, tube inspection and gauge verification to ensure continuous system readiness.
Breakdown maintenance
Quick troubleshooting and repair of tube leaks, pressure loss issues and valve-related faults.
Annual maintenance contracts (AMC)
Comprehensive and non-comprehensive AMCs with documented pressure readings and system condition reports.
Refilling and hydrostatic pressure testing
Cylinder recharge after discharge and hydrostatic testing carried out as per the required statutory cycle.
Training and demonstrations
Practical training for your team on system activation, alarm response and safe reset procedures.
Inspection and system health audits
Independent audits covering cylinders, tube condition, pressure levels and protection coverage across panels.
Compliance and Fire NOC support
Complete documentation and demonstration support required for Fire NOC approvals and compliance.

Built to recognised standards

These systems are governed by recognised fire and product standards, and we install to them: 

Designing to these matters for your Fire NOC, and for the insurance cover and equipment warranties that increasingly expect panel protection. For defence, power and export projects, we supply UL-listed and FM-approved components to match the tender. 

Where we install tube-based suppression

We fit and maintain tube-based systems for clients across India, protecting: 

LT, HT, MCC and PCC electrical panels

VFD, PLC and control cabinets

Switchgear and substation rooms

Server racks and data cabinets

UPS and battery banks

CNC machines and machinery enclosures

Generator and DG canopies

Wind turbine nacelles

Why building owners choose Zap Fire

The point of this system is to stop a fire before it ever becomes the building’s problem. That only works if it’s specified and maintained properly. Here’s what you get with us: 

Protection at the source

We put the system where the fire starts, inside the enclosure, not just in the room around it, where it would already be too late.

Works without power.

The tube needs no electricity, so it protects you through the power cut a fault often causes.

 KANEX and clean-agent systems

UL-listed tube and non-conductive agents that don't harm your equipment.

One team from design to AMC

The people who fit it are the people who maintain it.

ERP-tracked service.

Every pressure check and inspection logged and ready.

A partner since 2008

Turnkey fire protection delivered across India.

Frequently asked questions

1
How does a tube-based system detect a fire without sensors?
The polymer tube is the sensor. It runs through the enclosure under pressure, and when heat reaches around 110 to 180 degrees Celsius it bursts at the hottest point, which both detects and pinpoints the fire.
2
Does it need electrical power to work?
No. The system is self-contained and pneumatic, so it works during a power failure, which is often exactly when an electrical fire starts.
3
Direct or indirect, which do I need?
Direct suits a small enclosure like a single panel, where the tube discharges at the hot spot. Indirect suits a larger space, where the cylinder floods the enclosure through nozzles. We pick it around your equipment.
4
Can you fit it to panels we already have?
Yes. Tube-based systems retrofit into existing panels and machines with little disruption, which is one of their main advantages.

Talk to Zap Fire

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Your switchgear runs your building. Protect it at the source, before a fault becomes a fire 

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