Low Pressure Watermist System
Special Fire Extinguishing Systems

Etea Sicurezza

Low Pressure Watermist System

FIRE EXTINGUISHING SYSTEMS BASED ON LOW PRESSURE WATER MIST PRINCIPLE

Dispensing water in small droplets (few micron diameter) allows to fight the fire effectively by means of three distinct principles , which consist of:

  • accelerating the cooling down of fuel , by a more rapid process of water evaporation;
  • suppressing the fire, thanks to a partial replacement of oxygen with the water in the area surrounding the fire;
  • containing the radiant heat of flames, by saturating the environment where fire develops.

ETEASICUREZZA MIST LP

Systems generate water mist using low operating pressure (3.5 ÷ 6.0 bar), thus resulting among the most efficient firefighting water based systems present on the market.

ADVANTAGES OF ETEA MIST LP SYSTEMS OVER TRADITIONAL SPRINKLER SYSTEMS

  • Remarkable reduction (up to 1/3) of the amount of water, resulting in less damages caused by water.
  • The small diameters of pipes reduce installation costs and the overall volume of the system.
  • Fast installation with press-fit joints.
  • Smaller pumping stations, with reduction of electrical consumption and allocation space.
  • Smaller water tanks, with lower costs and smaller allocation areas.

ADVANTAGES OF ETEA MIST LP SYSTEMS OVER HIGH PRESSURE SYSTEMS

  • Remarkable reduction of material and installation costs.
  • Use of pipes made of polyethylene or carbon steel, upstream the filters, and galvanized or stainless steel AISI 304, downstream the filters.
  • Use of water from existing systems (sprinkler systems or hydrants) without implementing additional pumping stations.
  • Direct water supply from Fire Brigades emergency water net connection.
  • Reduction of electrical consumption
  • Efficiency of the system also for HHS fire hazard, with intensive storage up to 8 meter height.

RISKS AND APPLICATIONS

ETEA MIST LP systems provide a wide range of applications depending on the different activities exposed to fire risk: museums, libraries, archives, technical spaces, garages, warehouses, production plants and hazardous locations.

  • Activities with LH classifi ed risks (nozzles with and without bulb; hmax: 3.5m);
  • Activities with OH1 classifi ed risks (nozzles with and without bulb; hmax: 3.5m);
  • Activities with OH2 classifi ed risks (nozzles with and without bulb; hmax: 8m);
  • Activities with OH3 classifi ed risks (nozzles with and without bulb; hmax: 8m);
  • Activities with OH4 classifi ed risks (nozzles with and without bulb; hmax: 8m);
  • Activities with HHS classifi ed risks (nozzles with and without bulb; hmax: 8m);

For each activity falling under the risk levels listed above ETEA has all the necessary fire tests (Test Reports issued by Notifi ed Bodies in accordance with CEN / TS 14972) in order to help the design engineers to apply / design Water Mist Systems and then get the validation by the competent Authorities (Fire Brigades or any other AHJ).

DESIGN OF ETEA MIST LP SYSTEMS:

The international technical standards for designing low pressure water mist systems are the following:

  • CEN/TS 14972 Fixed Firefi ghting Systems - Watermist Systems - Design And Installation
  • EN 12845 Fixed Firefi ghting Systems - Automatic Sprinkler Systems - Design, Installation And Maintenance
  • NFPA 750 Water Mist Fire Protection Systems.

CERTIFICATIONS AND APPROVALS

in compliance with CEN/TS 14972.

ETEA MIST LP DELUGE SYSTEM

  • Aspiration Smoke Detection system;
  • Linear Heat Detection system;
  • Control Unit for extinguishing system activation (EN 12094-1);
  • Pump group ETEA PUMP (CEN/TS 14972);
  • Deluge valve D-Valve (CEN/TS 14972);
  • Open nozzle ET1, with K factor of 2,7 lt/min/√bar (CEN/TS 14972);
  • Open nozzle ET2, with K factor of 4,8 lt/min/√bar (CEN/TS 14972).

ETEA MIST LP WET/DRY SYSTEM

  • Pump group ETEA PUMP (CEN/TS 14972);
  • Wet valve ETEA W-Valve (CEN/TS 14972);
  • Nozzle ET3 IDF, with thermal bulb, K factor of 22 lt/min/√bar (CEN/TS 14972);
  • Nozzle ET3, with thermal bulb, K factor of 14 lt/min/√bar (CEN/TS 14972);
  • Nozzle ET4, with thermal bulb, K factor of 14 lt/min/√bar (CEN/TS 14972).

WETTING AGENT

  • Suitable for Class A and B fires;
  • Fully biodegradable, does not leave harmful residues behind;
  • Very fast extinguishing, 6 times faster than water;
  • It prevents re-ignition of fire (reduced water consumption);
  • Nontoxic for people, animals and the environment;
  • Highly efficient (only 3%-6% mix);
  • Has strong cooling down effect;
  • No costly cleaning-up operation because what is left will work as a fertilizer;
  • Can be used with salt or fresh water and fits on all equipment;
  • Compliant with EN 1568 Parts 3 and 4 Fire extinguishing media. Foam concentrates. Specification for low expansion foam concentrates for surface application to water-immiscible liquids.

CONTACTS

ETEA SICUREZZA GROUP LTD
Tower 42, 25 Old Broad Street
London, EC2N 1HN, UK

Tel. +44 020 787 740 82
info@eteasicurezzagroup.com

Tel. +4402078774082+4402078774082 info@eteasicurezzagroup.com

SERVICES

EXPLOSION RISK ASSESSMENT

DESC allows to simulate evolution of dust explosion in complex geometries ...

FUNCTIONAL SAFETY

Functional safety is defined as the part of the overall safety of the equipment or process ...

FIRE RISK ASSESSMENT

Risk prevention is one of the primary objectives of the assessment of the risks ...

NEWS ARCHIVE

Civil Defence Exhibition & Conference 2015

Etea Sicurezza Group is glad to announce its participation to the Civil Defence Exhibition & Conference in Doha