9
Danger of explosion due to explosive atmosphere inside the
pumps!
- Pumps with simple mechanical seals or magnetic couplings are
never
approved for an inside explosive gas atmosphere!!
Danger of explosion due to zone entrainment!
- The formation of a potentially explosive mixture within a pump
which is not suitable for use and is not marked accordingly (no
"X" on the rating plate and no unambiguous information in the
order-related documents) is not permitted.
- The operating company is responsible for a clear zone
assignment according to Directive 99/92/EC with indication of the
gas or dust group according to DIN EN ISO 80079-36.
The following subdivision of the hazard zones must be distinguished:
Zone 1
Zone 21
Areas in which a hazardous explosive atmosphere consisting of
gas, vapor, mist and mixtures thereof with air and/or dust and
mixtures thereof with air is likely to occur occasionally.
Zone 2
Zone 22
Areas in which it is to be expected that a hazardous explosive
atmosphere consisting of gas, vapor, mist and mixtures thereof
with air and/or dust and mixtures thereof will occur infrequently
and for short periods.
3.1.1 Ambient conditions at the place of installation
The ambient temperature must be within the range of -20 °C to +40 °C at the
installation site of the
Fristam
pump or unit.
The maximum permissible relative humidity and the maximum installation altitude
can be found in the manufacturer's documentation for the drive.
Danger of explosion due to dust deposits!
- Dust deposits on the outer surfaces of the pump unit as well as dust
settling behind the enclosures in lantern compartments and on
connecting components must be strictly prevented.
- Accumulated dust layers may not exceed the limit value of the
maximum layer thickness of 5 mm.
- Dedusting work must be included in the cleaning and maintenance
cycle.
3.1.2 Pumping medium
In addition to the intended use described in the "Original operator's manual",
flammable liquids or liquids with flammable components can also be pumped in the
ATEX area.
