Operation; Atex Directive Implications; Flammable/Pyrophoric Materials - Edwards RV3 Instruction Manual

5. Operation

WARNING:
Do not expose any part of the human body to vacuum as it can cause injury.

5.1 ATEX directive implications

This equipment is designed to meet the requirements of Group II Category 3 equipment
in accordance with Directive 2014/34/EU of the European Parliament and the Council of
26th February 2014 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 whilst within their explosive limits.

5.1.1 Flammable/pyrophoric materials

WARNING:
Obey the instructions and take note of the precautions given below to ensure that
pumped gases do not enter their flammable ranges
When flammable or pyrophoric materials are present within the equipment:
▪ Do not allow air to enter the equipment.
▪ Ensure that the system is leak tight.
▪ Use an inert gas purge (for example, a nitrogen purge) to dilute any flammable
gases or vapours entering the pump inlet, and/or use an inert gas purge to reduce
the concentration of flammable gases or vapours in the pump and in the exhaust
pipeline to less than one quarter of the gases' published Lower Explosive Limits
(LEL).
▪ Use an inert gas purge into the pump gas ballast connection to prevent the
condensation of flammable vapours within the pump mechanism and exhaust
pipeline.
A65201880_AA
A65201880_AA - Operation
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