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Manual BVS 21 ATEX E 070
4.3
Earthing and potential equalization
The earthing or external potential equalization
shall be ensured by the installation of the safety
valve.
5.
Maintenance
The provisions of IEC 60079-17 'Inspection
and maintenance of electrical installations in
hazardous areas' relating to inspection, ser-
vicing and maintenance must be complied
with. In the course of inspections and main-
tenance work, those components on which
the type of explosion protection is dependent
must be inspected particularly carefully.
Only genuine spare parts from the Manufac-
turer may be installed
Defective safety valves or defective seals shall
be replaced immediately in order to maintain the
IP degree of protection. Only original spare parts
supplied by the manufacturer shall be used.
5.1
Qualifications
The inspection, servicing and maintenance of
installations shall only be carried out by experi-
enced personnel who have been taught about
the various types of protection and installation
methods, relevant rules and regulations and the
general principles of the classification of areas
during training. Appropriate further training or
training sessions shall be carried out by person-
nel on a regular basis.
5.2
Maintenance intervals
The necessary maintenance intervals depend
upon the specific applications and shall be stip-
ulated by the operator according to the specific
operational conditions.
5.3
Ambient temperatures
The safety valve may be used in ambient tem-
peratures ranging from –50 °C to 80°C.
Edition August 2022
Copyright
thuba Ltd., CH-4002 Basel
Switzerland
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