Extinguishing devices
Automatic extinguishing devices are used for fast, reliable extinguishing of sparks detected in mechanical and pneumatic conveyor systems. There are various versions of the automatic extinguisher, differing in the number of extinguishing valves and nozzles used. The followingextinguishing devices are available, depending on the diameter of the suction pipe or shaft:
SP1D-R
SP2D-R
SP2D-R + SP1D-R
SP2D-R + SP2D-R
Pressure booster system WDS
A pressure booster system WDS is required in all cases where a flow pressure of extinguishing water of Pmin =7 bar to the extinguishing system cannot be guaranteed. The WDS system consists principally of multi-stage vertical centrifugal pump and a membrane pressure vessel (admission pressure 7 bar). Extinguishing water used is automatically replaced after each extinguishing procedure. The VB supply container is only required if a supply of at least 240 litres/minute cannot be guaranteed for the centrifugal pump. The supply container also serves to provide a biological separation between town water supply and extinguishing water.
Flow switch DFW
In conjunction with the standard fitted extinguishing water control at the spark alarm unit, the flow switch monitors the extinguishing devices and their operation. By installing the flow switch, the following conditions are reported from the spark alarm unit:
Light bar:
1 = Water supply fault
2 = Alarm on, no water
3 = Water on, no alarm
4 = Water on, no production
Water tank VB1/VB2
Water tanks are used, if a water flow of 180 l/min at 2 bar cannot be ensured by the available water supply. Additionally by the pressure-free inlet a biological separation between city water and extinguishing water is achieved, i.e. it cannot flow back possibly contaminated water into the potable water supply system.
Waterpipe heating
Self-regulating heating band HB1
If extinguishing pipes are laid in areas prone to frost, they must be protected against freezing. By means of the self-regulating heating band, the extinguishing system is warmed up electrically.
Connection set AG1
The conection set (shrink-on sleeve), together with the relavant conection box, is used for conecting the self-regulating heating band to the normal installation cable.
Outdoor thermostat TH1
The outdoor thermostat is used to switch the individual sections of the heating band on and off if the outside temperature falls too far (t = < 5° C).
Heating band monitor HBW3
The heating band monitor controls and monitors the separate heated extinguishing water circuits.
