72 HEALTH & SAFETY
the range of the WTO monitors is between 75 metres and 90 metres plus. These capacities and throw lengths are extended in the manually-operated SKUM FJM-MAN monitors, where the maximum capacity is 20 000l/min and the maximum throw is over 120 metres.
Adjustable nozzle
The FJM-FJF monitor has a manually adjustable nozzle for flows from 5000l/ min to 20 000l/min; a performance that is mirrored by the FJM-SLN, which has an automatic nozzle. The two remotely-controlled monitors
Fig. 2. The new RAFT Rapid Response Foam Trailer that is designed to be highly mobile.
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Monitors need to be robust, unerringly reliable and deliver their promised performance at a moment’s notice. The jet reaction force of a monitor can be considerable, so monitors need to be securely restrained so they remain ‘on target’ when in operation.
Trailer-mounted monitor
A trailer-mounted monitor depends on the stability of the trailer unit, which may incorporate stabilising outriggers. Some have integral water tanks that increase the trailer’s weight and provide additional stability.
Other considerations when selecting a monitor include compactness of the monitor, a balanced design for improved performance and – particularly for portable and manually-operated monitors – light weight and the incorporation of low-friction bearings for easy manoeuvrability. The current SKUM FJM range embraces portable, oscillating, manually-operated, and remote hydraulically-operated and electrically-operated fog/jet, water/foam monitors. Most are FM (Factory Mutual) approved and certified by DNV (Det Norske Veritas), Rina (Registro Italanio Navale), and BV (Bureau Veritas). The FJM-P portable monitors deliver up to 3000l/min (litres a minute) and are available with the option of dual connection, automatic oscillation and a built-in foam inducting nozzle.
The manually-operated, self-oscillating FJM-WTO monitors are available with capacities of 3700l/min, 6000l/min and 11700l/min.
The WTO S models incorporate built-in foam induction, and depending on the model and capacity,
are the hydraulic SKUM FJM-H and the electric FJM-EL (Fig. 1). Both include a manual override option. The FJM-H has capacities of 6000l/min and 11700l/min, with a maximum throw in excess of 90 metres. However, it is the remotely-controllable FJM-EL fog/jet monitor range that is proving to be the
most popular.
The FJM-100 EL has a built-in inductor option and delivers up to 6000l/min to a maximum jet throw of 80 metres, while the FJM-150 EL increases this to 11 700l/min to a distance just over 90 metres. The top performing FJM-200 EL further increases the reach to 120 metres and the flow to 20 000l/min.
Optional components
Optional components include a control and operating panel, which can be either the standard FJM model or be custom-built, suction hose and valve, and explosion protected EEx (e) and flameproof EEx (de) electrical equipment.
One of the latest monitor offerings on the market is the new RAFT Rapid Response Foam Trailer that is designed to be highly mobile, versatile and cost- effective (Fig. 2). It can be fitted with either the FJM-80S or the FJM-100S manual fire monitors and is available as a single-axle 1000litre tank capacity unit, and as twin-axle 1800litre and 2300litre capacity trailers.
Both of these monitors are constructed with built-in foam concentrate inductors to ensure reliable, accurate and adjustable proportioning between 1 per cent and 6 per cent for all types of foam concentrate, eliminating the need for a separate proportioning system. o
Enter 72 or ✔ at
www.engineerlive.com/iog
Peter Kristenson is Senior Manager Product Management Team for SKUM foam hardware, Tyco Fire Suppression & Building Products, Manchester, UK.
www.tyco-fsbp.com.
www.engineerlive.com
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