en – Original instructions
e-IXPSA – Additional Installation, Operation and Maintenance Manual
7
DANGER: Potentially explosive atmosphere hazard
All the electric material used for the connection must:
•
Be suitable for use
•
Comply with local explosion protection regulations.
1.4.1 Explosion protection marking
The EX marking on the pump refers to the pump only. For the motor refer to its data plate and
to the Declaration of Conformity in the manual included in the supply.
Example of such marking on the pump is: II 2G h IIC Tx Gb
The marking shows the theoretically applicable range of temperature classes. Refer to
paragraph 1.4.1 for the different temperatures permitted, depending on the design of the
pump.
Also check the EX certification of the purchased motor and match it with the classification of the
pump.
1.4.1
Temperature limits
During normal operating conditions, the temperature of the pump body surface is the same as
that of the liquid. Expect extremely high temperatures:
•
On the pump casing surface
•
On the shaft sealing
•
On the bearings area
During the quotation stage, handled either by sales, the technical department, appointed
representatives or the supplier of the mechanical seal, check the heating of the liquid at the
shaft.
NOTE:
If the pump surface temperature exceeds that of the liquid, check that the temperature class of
the pump on the ATEX label is respected.
Check and comply with the prescribed temperature classes, for example if the pump is heated
with heating jacket.
In the area of the bearing brackets, leave a free space between the surface and the surroundings.
During pump operation, avoid excessive sedimentation of dust by ensuring regular cleaning, to
prevent the pump surface from overheating.
Respect the stated operating temperature. The maximum allowed temperature of the pumped
liquid at the suction depends on the temperature class.
The table shows the temperature classes and the maximum permissible pump temperatures
according to EN ISO 80079-36, the maximum operating temperatures of the pumped liquid,
and any special limitations.
