Kitchen Hood Fire Suppression Systems

Kitchen hood fire suppression systems are the contracting service of wet chemical extinguishing installations that automatically control grease fires originating from fryers-grills-cookers in commercial kitchens, inside the hood, smoke duct and cooking equipment. A hot oil fire (Class F) is a special hazard that splashes violently on water contact and climbs into the duct; a standard extinguisher therefore does not suffice — alkaline wet chemical forming a permanent soap layer (saponification) on hot surfaces, plus automatic gas cut-off, becomes mandatory. The system is one integrated suppression set of detector, nozzle line, chemical cylinder, gas valve and manual pull station.

System Components

• Mechanical-electrical release: The fusible link or line-type heat detector inside the hood frees the line at the temperature threshold; the spring-loaded pipe-nozzle chain sprays the chemical over all protected surfaces.
• Gas-energy cut-off: Synchronised with suppression, the gas valve and heater supply are disconnected — the master lock against re-ignition after extinguishing.
• Nozzle plan: Separate nozzle-flow calculations for fryer-grill-cooker-hood-duct transition and exhaust fan; per-device nozzle count and water spay function set by the manufacturer schedule.
• Indoor-outdoor types: Pipe-nozzle in wet pressurised environments, dry compartment in freezing zones; corrosion resistant stainless lines and capped nozzle hygiene.

Installation and Commissioning

Installation covers verifying hood-duct geometry by measurement, routing the chemical pipe away from food contact zones, the gas cut-off valve's process connection and the control panel-remote signal line (into the fire alarm panel). Commissioning records the release scenario simulation (with the fusible link recovery test kit), gas cut-off verification, nozzle spray pattern inspection and manual station operation. Kitchen staff are briefed and trained on the monthly visual check; the equipment location-label-access are fixed.

Periodic Inspection Duty

This is the most maintenance-hungry member of the extinguishing family: user-based monthly visual check and, by an authorised service, a six-monthly detailed maintenance — nozzle blockage-grease contamination, gauge-weighing, fusible link replacement interval, gas valve function and cylinder hydrostatic dates. Grease film can close a nozzle hole and the system stays ready-looking yet useless. Maintenance records are asked in insurance and fire audits; the service sits inside our extinguishing system inspection. Portable extinguisher completion and the duct grease cleaning interval are managed on one calendar.

Legislation and Outcome

The practice runs under Law No. 6331, the Regulation on Protection Against Fire in Buildings (automatic suppression requirement in commercial kitchens and duct rules) and food production-hygiene legislation; technical references are UL 300, NFPA 96/17A practice and manufacturer type approvals. In hotel, catering factory, mall food court and restaurant kitchens this system is the silent guardian of life and food safety. For a nozzle plan, quotation and maintenance agreement per your kitchen layout, see the contact page; this service sits under our Mechanical Installation Contracting heading.