Watson-Marlow 620RA - Manual (Page 2)

ATEX: Watson-Marlow 620RA, 620REA and 620RE4A pumpheads User Manual 2
2 Pumphead types
The following 600 series pumpheads are covered by this manual:
620RA ATEX Pump heads
620RA*
064.0211.A00 Two rollers for max 2 bar.
Continuous tubing only
620REA* 064.0231.A00 Two rollers for max 4 bar.
LoadSure tubing elements only
620RE4A* 064.0431.A00 Four rollers for max 4 bar.
LoadSure tubing elements only
* NB: these pumpheads are compatible with a number of Watson-Marlow cased
drives. However, the Watson-Marlow cased drives are not ATEX compliant and must
not be used in hazardous locations.
Any 600 series pumpheads not listed here are NOT suitable for use in
hazardous environments (at date of issue).
3 Hazardous environments
All of Watson- Marlow’s ATEX pumps are classified as Group II, Category 2G IIB c T4
equipment under the definitions of 94/9/EC:
“Group II, Category 2 products should be designed to be capable of remaining with-
in their operational parameters, as stated in the instruction manual, and based on
a high level of protection for their intended use, in areas in which explosive atmos-
pheres caused by mixtures of air and gases, vapours, mists or air/dust mixtures are
likely to occur.”
Furthermore, “The explosion protection relating to this category must function in
such a way as to provide a sufficient level of safety even in the event of equipment
with operating faults or in dangerous operating conditions which normally have to
be taken into account”.
Watson- Marlow pumps must not be used in the underground parts of mines,
and in surface installations of such mines, likely to become endan gered by
firedamp and/or combustible dust.
NB: where two or more items of ATEX equipment are combined, the complete
assembly shall carry the same rating as the lowest ranking individual piece of equip-
ment.