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The pump and its associated parts (motor, baseplate, pipes, etc.) must be equipotential and properly grounded.
1.3.2.3. Equipment with ATEX marking
The centrifugal pumps of the ESN-EX and ESH-EX series can be supplied with ATEX marked equipment from other
manufacturers (motor, flexible coupling, mechanical seal). The installed electrical and/or mechanical equipment, with a
given ATEX marking by third party manufacturers, must be checked and maintained according to the instructions given
by the manufacturers of such equipment and with the frequency indicated in their corresponding manuals.
Inspections and maintenance of ATEX electrical equipment that may affect its ignition protection (according to its ATEX
marking) must always be carried out in accordance with the EN 60079-17 standard.
The user must ensure that, after maintenance work, the installed electrical equipment has been connected in accordance
with the instructions of the equipment manufacturer and in conformity with EN 60079-14.
1.3.2.4. Equipotentiality and Grounding
All metal parts of the assembly are equipotential. The equipotentiality is guaranteed by means of metal braids joining
the different parts of the equipment or by means of the metal-metal joint. The equipotential connections must be
checked periodically.
Special attention should be paid to the equipotential connection of the metal parts of the assembly, especially after
maintenance work involving the disassembly of parts of the assembly. After such maintenance, the metal braids of the
equipotential connection must be reconnected and it must be checked that there are no isolated metal parts.
The whole assembly must be properly grounded.
The user must ensure proper grounding of the installations. This grounding must be periodically checked as established
in the Low Voltage Electrotechnical Regulations or equivalent national legislation.
1.3.2.5. Chemical compatibility
The user must ensure that the chemicals (gaseous or solid) that are or may be present in his premises are compatible
with the construction materials of the pneumatic conveying system. These substances must not cause corrosion,
exothermic reactions or physic-chemical alterations to the parts and components of the assembly (metal or non-metal
parts, internal or external).
1.3.2.6. Lubricants
The lubricants used in the conveyor system must be chemically compatible and not generate exothermic reactions with
the products that are or may be present inside the conveyor system or at its location.
These lubricants must have an ignition temperature of at least 185°C (for T4 pumps) or 250°C (for T3 pumps), which is
50K higher than the maximum surface temperature marked for the equipment.
1.3.2.7. Maintenance
The correct tightness of the pump parts and bolted elements must be checked periodically.
Special attention should be paid to the moving parts of such equipment: air gaps, seal bearings, shaft alignment, etc.
Periodic checks should be made of:
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Condition of the bearings in order to detect possible wear or premature failure and to replace them if necessary.
Special attention should be paid to signs such as abnormal noise, difficult rotation, loss of lubricant,
discoloration, etc.
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Condition of seals, seals, etc., checking that they maintain protection against the entry of solid or liquid elements
into the shafts.
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Correct alignment of shafts, verifying the absence of signs of friction between metallic elements.
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