Watson-Marlow 505LA - Manual (Page 2)

ATEX Directive: Watson-Marlow 505LA, 505LXA and 505LGA pumpheads User Manual 2
2 Pumphead types
The following 500 series pumpheads are covered by this manual:
505LA ATEX pumpheads
505LA*
053.4001.A00 505LA ATEX pumphead
505LXA* 053.4011.A00 505LXA ATEX pumphead
505LGA* 053.4010.A0G 505LGA ATEX pumphead
* 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 500 series pumpheads not listed above 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 within
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”
(see page 1) “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 endangered by
firedamp and/or combustible dust.
NB: where two or more items of ATEX equipment are combined, the complete
assembly shall carry the rating of the lowest ranking individual piece of equipment.
The following 500 series pumps are also ATEX-compliant but are dealt with in a
separate document (m-atex501rla-gb-05: PB0346).
501RLA ATEX pumpheads
501RLA*
053.0001.A00 Twin roller for 1.6mm wall thickness tubing
501RL2A* 053.0001.A20 Twin roller for 2.4mm wall thickness tubing
501RLGA* 053.0011.A0G Twin roller for 1.6mm wall Sta-Pure tubing
501RL2GA* 053.0011.A2G Twin roller for 2.4mm wall Sta-Pure tubing
501RLCA 053.0002.A00 Close-coupled for 1.6mm wall tubing
501RL2CA 053.0002.A20 Close-coupled for 2.4mm wall tubing
501RLCGA 053.0022.A0G Close-coupled for 1.6mm wall Sta-Pure
501RL2CGA 053.0022.A2G Close-coupled for 2.4mm wall Sta-Pure