Page 97 - Industrial Plants

towers. a pole or a platform with variable heights, usually
between 6 and 25 meters, or they can even be placed
Monitors can be operated and moved thanks to: on tower of ships.
• the valve for feeding the monitor, that opens/ At the base of the pole (or platform) a control panel can
closes be installed, often in EXd execution, connected to a
• horizontal rotation movement (normally between console placed in a safe area on which all signals and
340° and 360°) controls of other monitors of the same type (RCM) are
• vertical rotation movement (usually -75° + 80°) collected and the valves used for controlling the water/
• setting of stream control (in case of water nozzle foam line.
the flow can be adjusted jet/fog, in case of foam This kind of monitor is particularly suitable for fire risks
barrel with the possibility to change the shape of such as docks and jetties.
the jet) In case of jetty protection, the fire appliance is not
limited to RCM but it also includes:
Moreover, water network valves can be opened/closed - escape ways for personnel (with relevant spray
in order to activate the external cooling system for nozzle net)
cooling poles and/or the safety escape ways (as above - hydrants, suitable to deliver water (for cooling,
mentioned). sometimes the hydrant can be foam type and it
comes with relevant devices to product it)
Remote-controlled monitors come in three main types: - fire cabinets for hydrants (stainless steel or GRP
A) electrically operated (the most employed) made) complete with all accessories (hoses,
B) electro-hydraulically operated (more utilized) nozzles, etc.)
C) hydraulically operated (not used anymore due to - large size hose reels (1 ½” x 30 or 40 mt not
the complicated and difficult maintenance that is kinkable hoses) able to spray water or foam thanks
required) to a built-in foam concentrate tank (usually of 200 lt
capacity)
The above monitors can be supplied in several versions:
- for safe area
- for hazardous zone, explosion proof according to EXe
or EXd or ATEX (for electrical equipment and for
associated devices mounted with the monitor).

Moreover, the body can be made in stainless steel or
marine bronze and, in some cases, they can be made
of a special alloy suitable for very low temperatures
(-35°C or even -40°C)
Monitors for fixed installation can be located on the top

In relation with electrically operated RCM the water
feeding is made through a water pumping station,
activated by the control panels and all the operations
are controlled by the same main control panel.
This kind of system is really reliable, it quickly provides
action thanks to electrical remote controlled devices. It
does not need any particular maintenance.
The console can be installed also 250-300 meters
away from the monitor, thus allowing the operator to
interface by a local control panel or even by a master
control panel and sometimes the monitors can be
wireless controlled.
On the same pole both a foam monitor and a dry
Remote controlled fire monitor to be fixed on top of chemical monitor can be mounted, because they can
pole be employed in a independent way on flammable

IndustrIal Plants - May 2017
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