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Fixed Equipment

Oscillating Monitor

Fixed foam  systems are increasingly being used at high fire risk facilities because they take the guesswork out of fire fighting.

There's no better way of fighting a fire than having a properly designed foam fire fighting system in place before fire breaks out. 

System design – your guarantee of an effective suppression system.

  • EN 13565-2, NFPA 11 & NFPA 409 covers most of the applications found in handling flammable liquids. Hawkes Fire work with these standards day in day out to give you peace of mind

Foam proportioning – the heart of the system

  • If you have a pressurised water supply you can apply foam.
  • Use one of the proven methods – turbine proportioner, bladder tank & proportioner, balanced pressure proportioners or inductors. The choice depends on the application; we are here to advise what’s best for you.

Application – how do you apply the finished foam?

  • Unaspirated – devices that are not designed to entrain air into the solution. The best description of the finished foam is “milky” Even without air aspiration the natural foaming quality of the solution will give a very low expansion. Ideally suited to foam enhanced sprinklers where conventional closed bulb heads are used. It can also be used through open deluge nozzles but both require a good quality film forming foam (AFFF or FFFP) of the type manufactured by Angus Fire.
  • Low expansion – using devices that entrain air just prior to the outlet produces an expansion of around 20:1. This is most frequently used in deluge systems over and around process plant or higher inventories of drum and IBC product storage. Angus K40 & K20 are the market leading low expansion foam water nozzle. Other applications include tank pourers, rimseal pourers and monitors.
  • Medium expansion – most often in the form of bund pourers, the foam is expanded greater than 20:1 but not greater than 200:1. Can be ideal for large surface areas in process buildings and external tank farm bunds. High level of vapour suppressant quality means that low flash spills can be neutralised before they find an ignition source.
  • High expansion – requires generators that incorporate either a water driven fan or stainless steel mesh combined with high expansion foam. Greater than 200:1 expansion and will fill a large area such as an aircraft hangar in minutes. Only suitable for indoor use due to the lightness of the finished foam. Specialist LNG equipment also available for the challenges presented by this very volatile fuel.

 

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