Atex Directive Implications - Edwards A373-30-940 Instruction Manual

A373-10-880 Issue R
1.2

ATEX directive implications

This equipment is designed to meet the requirements of Group II Category 3 equipment in accordance with
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Directive 94/9/EC of the European Parliament and the Council of 23rd March 1994 on the approximation of
the laws of the Member States concerning equipment and protective systems intended for use in potentially
explosive atmospheres. (The ATEX Directive).
The ATEX Category 3 applies in respect of potential ignition sources internal to the equipment. An
ATEX Category has not been assigned in respect of potential ignition sources on the outside of the equipment
as the equipment has not been designed for use where there is an external potentially explosive atmosphere.
There is no potential source of ignition within the pump during normal operation but there may be potential
sources of ignition under conditions of predictable and rare malfunction as defined in the Directive.
Accordingly, although the pump is designed to pump flammable materials and mixtures, operating
procedures should ensure that under all normal and reasonably predictable conditions, these materials and
mixtures are not within explosive limits. Category 3 is considered appropriate for the avoidance of ignition in
the case of a rare malfunction which allows flammable materials or mixtures to pass through the pump while
within their explosive limits.
When flammable or pyrophoric materials are present within the equipment you must:

Not allow air to enter the equipment.
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Ensure that the system is leak tight.
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For further information, please contact Edwards: refer to the Addresses page at the end of this manual for

details of your nearest Edwards company.
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