Territory Fire can offer both "Wet" and "Dry" sprinkler systems. The type of sprinkler system is determined by the Ship's owner, the class/regulatory requirement of the ship and its shipping route.
Marine regulatory requirements are governed by Lloyds Register of Shipping, the Marine Safety Agency and IMO Solas.
Wet Valve System
Marine Wet valve sprinkler systems comprise a lightweight control valve conventional pendent spray and upright spray sprinklers and a dedicated water supplies system. They are permanently charged with a primary water supply fed from a "fresh water" supply tank. The water supplies system can also draw unlimited amounts of "sea water" should the primary "fresh water" become exhausted.
In the event of a fire, the sprinkler located closest to the seat of the fire will operate when the temperature reaches a pre-determined level to discharge water and extinguish the fire. The steady flow of water through the open sprinkler will actuate operate electric, and/or hydraulic fire alarms to alert the crew to the situation.
Dry Valve System
Marine Dry valve sprinkler systems are usually installed at the request of the Ship's owner, or to meet the requirements of Lloyds Register of Shipping, the Marine Safety Agency and IMO Solas. These systems are permanently charged with air in readiness for a fire emergency.
When the system is set is charged with air, the minimum air pressure includes a safety factor to prevent potential water pressure fluctuations from the water storage tank forcing the Dry valve clack open to allow water into the system pipeworkAn accidental loss of air pressure will initiate a low air pressure alarm to alert the ship's crew to the situation. A rapid loss of air pressure through an operated automatic sprinkler in response to heat from a fire will allow the water pressure within the Dry valve to overcome the differential holding the clapper assembly closed. This allows the clapper assembly to open and allow water to be discharged into the pipework system and be discharged through any open sprinklers.
When there is a steady flow of water into the system that is equivalent to the discharge rate of one or more sprinklers, electric, and/or hydraulic alarms will be initiated.
Territory Fire Service & Training is a wholly-owned Australian company providing a comprehensive range of fire products and services with offices in Darwin.