Installation, Operation and Maintenance manual
4
DFPRE 4 Dust Collectors
IMPORTANT
Please read this manual carefully before installation.
This manual should be read in conjunction with the respective controller manual
supplied with the dust collector.
Product reliability, warranty and safe operation may be compromised by not following
the guidance given in these documents.
Applications having a risk of sparks and fires
1. Use
The DFPRE 4 dust collector is designed for indoor/outdoor use, laser cut
applications and for handling non-explosive dusts.
2. EU Directive 99/92/EC
A reinforced and/or vented dust collector must be used when handling dusts
that have the potential to form an explosive atmosphere. If a non-reinforced and/
or non vented dust collected is used on these applications then the end user
must ensure an equivalent, secure, and fool proof basis of safety, which must
be clearly documented in the end users Explosion Protection Document in line
with Article 8 of EU Directive 99/92/EC.
3. Self Heating Materials
Please note that some materials have the potential to self generate heat and
hence to become an ignition source, that could result in a fire and / or an explosion
(exothermic reactions). For this reason, ferrous and non-ferrous materials should
not be extracted in to the same dust collector, as when combined they can create
a violent thermite reaction that would ignite a fire and/or explosion.
4. Applications having a risk of sparks and fires
Where sparks are generated by the process, this must be considered as a potential
ignition source which increases the risk of a fire or explosion. The filter can be
supplied with an optional spark trap to help reduce the frequency of spark ignition
and should be regarded as part of a risk reducing strategy.
The spark trap is not an extinguishment system and should never be relied upon
to achieve spark eradication in processes where suppression requirements are
absolute. The spark trap does not guarantee complete elimination of sparks
and does not preclude the possibility of fire or explosion. Therefore, system
redundancy and complementary measures should be taken in conjunction with
the spark trap to further reduce the risk of fire and explosion from sparks in
applications where there is potential for catastrophic combustion. Flame retardant
media is recommended for these type of applications.
On these types of applications the enduser should carry out regular good
housekeeping, such as:
• Periodically check for dust fall out in ducting and remove.
• Pulse down off line regularly to minimise retention of dust cake on filter
cartridges.
• Empty dust bins frequently.
Other risk reducing strategies could include:
• Inject with an inert material.
• Consider additional spark detection and fire suppression equipment.
