Donaldson Torit Unimaster Series Installation, Operation And Maintenance Manual page 7

Installation, Operation and Maintenance Manual
Unimaster Dust Collectors – Series UMA 40-750
GENERAL SAFETY REQUIREMENTS
Where the equipment supplied is suitable for working within a potentially
explosive atmosphere (as defined by Directive 94/9/EC) it will be according
to the categories and conditions marked on the collector serial nameplate.
You should ensure the equipment supplied by others is also suitable. If
no marking is given on the serial nameplate then the supplied equipment
is not suitable for use in potentially explosive atmospheres.
Care should be taken to ensure that any potentially explosive atmosphere
is not present when performing operations that increase the risk of ignition
(opening of controller for adjustment or electrical repair for example).
Ensure the installation is always returned to its original state.
To reduce the risk of ignition when handling explosive or flammable
materials, it is important that the accumulation of flammable deposits are
prevented/removed, e.g. from within ducting etc.
If the collector is handling a potentially explosive dust or is placed in a
potentially explosive atmosphere, then all motors should be connected
to thermal protection devices to prevent them exceeding their maximum
surface temperature. All electrical equipment should comply with a
category according to EN 60079-0.
Where the dust being processed can ignite due to exothermic reaction,
including self ignition, the collector MUST be fitted with a suitable
explosion protection method (venting for example). The risk of ignition
can be minimised by avoiding the accumulation of dust layers with regular
cleaning.
The dust collector may be fitted with explosion protection in the form of a
vent panel. Precautions, as set out in the Scope of Delivery, are used to
minimise the risk of ignition of any dust clouds contained within the dust
collector. The possibility of other ignition sources being introduced into the
collector during periods where any dust cloud may be present should be
minimised. Particular care should be taken to avoid introducing glowing
particles via the collector inlet ducting.
The explosion relief assembly, where fitted, has been designed to provide
adequate safety from an explosion initiated from within the collector, for
the given dust explosion characteristics and collector arrangement as
set out in the Scope of Delivery. You should ensure that explosions are
not allowed to propagate into the dust collector (using suitable isolation
devices) since pressures may be generated leading to unsafe equipment
rupture.
Where applicable, equipment connected to the dust collector (for example,
a cyclone) should be protected, using suitable isolation devices, against
the transfer of flame and pressure if, in the event of an explosion initiating
inside the dust collector, the connected equipment is not capable of safely
withstanding these effects.
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