Watson-Marlow 501RLA, User Manual

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2 Introduction
Directive 2014/34/EU, commonly known as the ATEX directive, carries obligations to the person who
places equipment on the market, in the EU territory, for use in potentially explosive environments.
All of Watson-Marlow’s ATEX pumps have been rated as II 2G Ex h IIB T4 Gb X under the definitions of
2014/34/EU:
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Equipment group II
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Equipment category 2
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Environment G
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Mechanical protection concepts EX h
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Gas group IIB
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Temperature class T4
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Equipment protection level Gb
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Special operating restrictions X (see section 12 "Special conditions of use for safe operation - Tube
materials suitable for use with this equipment" on page 22)
"Equipment category 2 comprises equipment designed to be capable of functioning in conformity with
the operational parameters established by the manufacturer and of ensuring a high level of protection.
Equipment in this category is intended for use in areas in which explosive atmospheres caused by gases,
vapours, mists or air/dust mixtures are likely to occur occasionally. The means of protection relating to
equipment in this category ensure the requisite level of protection, even in the event of frequently
occurring disturbances or equipment faults which normally have to be taken into account."
Watson-Marlow pumps must not be used in the underground parts of mines, and in surface
installations of such mines, likely to become endangered by firedamp and/ or combustible
dust.
As stated in the Directive, where two or more items of ATEX equipment are combined, the complete
assembly shall carry the same rating as the lowest ranking individual piece of equipment.
All Watson-Marlow ATEX pumps covered by this manual are intended for use in gas based environments
only.
If you are unsure about the meaning of this ATEX rating see section 19 "ATEX marking" on page 36 or
contact your Watson-Marlow representative for advice. Watson-Marlow representatives can advise which
rating and approvals products carry, but cannot evaluate nor recommend which product may be
suitable for use in an end users hazardous installation. Only the end user or their qualified representative
can confirm the ATEX rating of the equipment meets the requirements of their installation.
DANGER! - EXPLOSION HAZARD
Incorrectly selected ATEX equipment can cause fire or explosion.
PB0346:m-501atex-en-03 4
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