Dry powder fire systems

The extinguishing powders used in powder extinguishing systems are highly efficient, quick-acting extinguishants. The sudden extinguishing effect of the powder cloud is caused by the suffocation effect and the anticatalytic effect, a chemical intervention into the combustion process. Extinguishing powders mainly consist of non-poisonous inorganic salts mixed with waterproofing and pouring agents. They are used for fires with solid, liquid or gaseous substances and for metal fires, thus, they are used for fire classification A, B, C and D.

Large powder extinguishing systems

If several rooms and objects are to be protected with powder extinguishing systems, a central powder storage in compression-proof steel vessels, which is sufficient for all protection areas, should be provided.

Small powder extinguishing systems

Small powder extinguishing systems are recommended for objects with a limited scope of protection. To a great extent the design and dimensioning of such powder extinguishing systems is standardized for several similar objects and thus, costs are minimized. They are preferably used in extractor hoods, exhaust air ducts, laboratories and experimenting institutes etc.

Range of application:

e.g. chemical works, petrol dumps, compressor and pump stations, utilities substations for oil and gas, gas burner stations at boiler plants, oil cellars, rolling mills, test stands, hydraulic systems, aircraft hangars, LNG, LPG and chemical tankers, laboratory rooms and equipment, hazardous waste systems

Dry chemical fire systems

Dry Chemical Powder Fire Exinguishing System When introduced directly to a fire, dry chemical powder extinguishes flames almost immediately. Dry chemical powder is intended for use in extinguishing fires involving bulk chemical agents and liquefied gases. The Gielle Dry Chemical System, provides 24-hour fire protection for a wide variety of industrial processes, equipment, machinery and paint spray booth applications. The system has the choice of two dry chemical agents effective on Class A, B and C fires. Total flooding or local application design options. The system includes detectors, a control unit, agent storage cylinders, piping and discharge nozzles.

Benefits

• Easy to design

• Safe and reliable fire protection

• Flexible installation parameters

Our dry systems are developed to meet the increasing demand for large capacity systems for the protection of ships carrying LNG/LPG and certain chemicals or agents in bulk. The Fire Tec Dry Chemical System is your best choice for protection of any industrial process or machinery where hazardous liquids or hazardous materials are involved. The Fire Tec System is available in two basic configurations: as a local application system or a total flood system. A local application system is designed to protect a specific piece of equipment, a total flood system is recommended for protection of enclosed rooms or spaces. In addition to the configurations, the Fire Tec System also offers options for detection and control to create a system that will be ideal for your application. Your Fire Tec Distributor can help you design the right system, and the right approach, for your application.

Wet chemical fire systems

The systems are ideally suited to meet the demands associated with today’s busy catering facilities an important characteristic of grease fires is auto-ignition. Cooking grease at room temperature is not a problem. Its vapours, for example, are not easily ignited. However, when heated to autoignition temperature extinguishing the fire alone and removing the heat source may not prevent re-ignition. Reignition can occur until the liquid is cooled below its auto-ignition temperature.

Wet Chemical - Extinguishing Action The Wet Chemical Extinguishing agent is a potassium carbonate based solution which is discharged as fine droplets into a protected area. The main extinguishing action is by cooling caused by the heat of vapourisation. The fine spray discharge prevents the dangerous splash of hot grease or thermal shock damage to cooking appliances. Re-ignition is prevented by saponification, a process in which the wet chemical agent combines with the grease to form a soapy layer at the surface of grease to seal off the fuel from the oxygen, allowing the grease to cool to below it’s auto-ignition temperature. Installation The Installation of fixed fire fighting equipment in busy catering facilities requires extensive experience in the scheduling and performance of this type of work. Our experience in the installation of restaurant fire fighting systems ensures a minimum of disruption. Pipework for Wet Chemical systems may be black, chrome plated or stainless steel to suit the particular requirements of the application. Application The system operates at a nominal pressure of 12 bar (175p.s.i.) providing a fine spray discharge lasting for a nominal 45 seconds. The unique nature of the Wet Chemical Extinguishing Agent eliminates many of the piping limitations commonly associated with dry chemical systems. Clean-Up Wet Chemical agent unlike Dry Powder may be quickly cleaned up following a discharge resulting in shorter down time of the cooking range. Storage Wet Chemical system utilise storage containers in a range of sizes to suit the individual requirements of the hazard. Controls The Wet Chemical system may be controlled manually or automatically using electrical detection equipment or mechanical fusible link devices.