Watson-Marlow 300 User Manual
300 Series pumpheads ATEX Directive (94/9/EC)
1 Introduction
Directive 94/9/EC, commonly known as the ATEX directive, carries obligations to the
person who places equipment on the market, in the EU territory, for use in
potentially explosive environments. A number of pumps manufactured by WatsonÂMarlow are suitable for use in hazardous environments; ATEX compliant pumps
from the 300 series are listed below, in Section 2 "Pump models".
All of Watson-Marlow's ATEX pumps have been rated as Group II, Category 2G 11B
c T4 equipment. The 313 and 314 pumphead range is intended for use in gas based
environments only. The pumpheads are sold individually (for use with customer
specified ATEX drives) and in defined configurations supplied complete with ATEX
drives.
This document provides specific ATEX information and should be used in
conjunction with the original user manual.
2 Pump models
The following 313/314 pumpheads are covered by this manual:
313 and 314 ATEX Pumpheads
313DA* 033.3411.A00 3 roller, tongued drive fitting for 1.6mm wall tubing
313BA* 033.3421.A00 3 roller, bareshaft fitting for 1.6mm wall tubing
313XA* 033.3431.A00 3 roller, extension head for 1.6mm wall tubing
313XBA* 033.3441.A00 3 roller, bareshaft extension head for 1.6mm wall tubing
313D2A* 033.3511.A00 3 roller, tongued drive fitting for 2.4mm wall tubing
313B2A* 033.3521.A00 3 roller, bareshaft fitting for 2.4mm wall tubing
313X2A* 033.3531.A00 3 roller, extension head for 2.4mm wall tubing
313XB2A* 033.3541.A00 3 roller, bareshaft extension head for 2.4mm wall tubing
313B2A* 033.3521.AM0 3 roller, Manesty bareshaft fitting for 2.4mm wall tubing
313XB2A* 033.3541.AM0 3 roller, Manesty bareshaft extension head for 2.4mm
314DA* 033.4411.A00 4 roller, tongued drive fitting for 1.6mm wall tubing
314BA* 033.4421.A00 4 roller, bareshaft fitting for 1.6mm wall tubing
314XA* 033.4431.A00 4 roller, extension head for 1.6mm wall tubing
314XBA*
314D2A*
314B2A* 033.4521.A00 4 roller, bareshaft fitting for 2.4mm wall tubing
314X2A*
314XB2A* 033.4541.A00 4 roller, bareshaft extension head for 2.4mm wall tubing
* 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 313 or 314 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 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
atmospheres 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 endangered 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
equipment.
033.4441.A00
033.4511.A00
033.4531.A00
wall tubing
4 roller, bareshaft extension head for 1.6mm wall tubing
4 roller, tongued drive fitting for 2.4mm wall tubing
4 roller, extension head for 2.4mm wall tubing
4 Operating parameters
The following tube materials can be used with 313 and 314 ATEX pumpheads. Bore
sizes range from 1.6mm to 8.0mm, with an option of 1.6mm or 2.4mm wall thickness:
Tubing: working temperature range
Marprene 5C to 80C
Bioprene 5C to 80C
Pumpsil platinum-cured silicone -20C to 80C
STA-PURE PCS 0C to 80C
STA-PURE PFL 0C to 80C
The following parameters define the boundary of the safe working envelope - these
values must not be exceeded (ATEX compliance will be invalidated):
313 and 314 pumpheads
Ambient temperature range 5C to 40C
Max peak pressure (0.5 to 4.8mm bore) 2 bar
Max peak pressure (6.4 to 8.0mm bore) 1 bar
Max continuous speed, 313 400 rpm
Max continuous speed, 314
Max intermittent speed 600 rpm
Corrosion resistance See 8 Materials
Tube life See 7 Tube life
WARNING! Do not run dry for excessive periods. Roller and tubing temperatures
can exceed normal operating range.
WARNING! Do not run pumphead against a dead-end condition (closed discharge).
This can lead to excessive roller and tubing temperatures and pressures in excess
of the limits in the table above.
When two or more items of ATEX equipment are combined, the permissible
operating envelope will be determined by the narrowest range after considering all
values for a given parameter.
5 Potential pump hazards
As part of the requirements of 94/9/EC all potential hazards, including expected
malfunctions, have been identified and subjected to a risk assessment. In order to
prevent these ignition sources becoming effective a number of changes have been
implemented. In addition to engineering modifications, the changes include additional
operating instructions in order to specifiy correct usage in hazardous locations.
Recognised ignition sources
Surface temperatures of rollers and spindles
Tube burst and subsequent spilling of pumped fluid
Mechanical failure of rotor hub
Exothermic chemical reaction
Electrostatic discharge
Bearing failure
6 Installation guidelines
Please refer to the standard 313/314 pumphead manual (PB0210) for general
installation instructions.
The 313/314 pumpheads achieve ATEX II 2G IIB c T4 equipment compliance for
electrostatic discharge from non-conductive parts without modification. This is
because the 313/314 pumphead projected surface area in any direction is less than
100cm2. EN13463-1:2009 par 7.7.4 for Gas Group IIB equipment states that there is a
danger of electrostatic charge under normal conditions of use for equipment with
greater projective area than 100cm2.
The bare shaft models need to be installed with the bareshaft connected to earth,
this is usually achieved via the use of a suitable ATEX drive, it is the customers
responsibility to ensure safe operation.
The effect of this is that a MAXIMUM OF TWO 313/314 PUMPHEADS can be used in
a ganged, multi-channel, Group IIB equipment configuration.
If the tubing, external to the pumphead, comes into dynamic contact with another
surface or is in proximity to an electrical/magnetic field, the tubing could become
electrostatically charged. Tubing should be positioned to prevent this from occurring.
The torque requirement for 313/314 ATEX pumpheads is 2.2Nm under worst-case
conditions. A drive unit should be selected that can safely generate this torque
below any overload condition. All Watson-Marlow close-coupled drives have been
configured in this way with thermistors for thermal overload protection.
7 Tube life
A number of factors contribute to the life of the tubing:
Factors influencing tube life
Normal tube fatigue - dependant on tube size and material.
Incorrect tube loading - see 313/314 pumphead manual (PB0210) for guidance.
Excess working pressure - see Section 4 "Operating parameters" .
Chemical incompatibility - a table of tubing compatibility can be found on
http://www.watson-marlow.co.uk/pdfs-global/wd-chemcompat-05.pdf
Immersion kits are available from Watson-Marlow for testing.
For each application it is strongly recommended that tube life should be determined
by trials, prior to installation in a hazardous environment. If this is not possible, or if
there is any doubt in terms of tube life then the following hazards should be
recognised before installing a pump in a potentially explosive atmosphere:
Chemical reaction between pumped fluid and pump materials - the materials of
construction are LISTED IN SECTION 8.
Pumped fluid can be ignited by surface temperature of rollers - all Watson Marlow's
ATEX equipment has been rated as T4 (meaning that even under worst-case
operating conditions the maximum surface temperature will not exceed 135C).
300 rpm
8 Materials of construction 313/314 pumpheads
Description Part No. Material Finish
Body - rear DE1601M PPA IXEF 1022
Body - front DE1602M PPA IXEF 1022
Track DE1604M PPA IXEF 1022
Lever DE1605M PPA IXEF 1022
Locking lever DE1606M Nylon 66 (30% glass fill)
Clamp - tube DE1607M PPA IXEF 1022
Rotor RM1610M Nylon 66 (30% glass fill)
Roller DE1612T Nylatron GS
Adjuster - tube clamp DE1608M Nylon 6
Knob - tube clamp adj DE1609M Nylon 6
Clamp - tube 313/314 DE1620M PPA IXEF 1022
Plate - adaptor DE1615M PPA IXEF 1022
Spindle DE1614T BS970.230MO7PB (EN1A) Nickel plate
Shaft DE1613T Stainless steel 303S31F9
Ball bearing BB0014 Steel (1% carbon, 1.5% chromium)
Bearing BB0049 Sintered bronze
Spring SG0011 Stainless steel
Pin - Groverlok FN2500 Mild steel
Screws Stainless steel
Nuts Stainless steel
Screw - Plastite 45 FN0299 Mild steel Zinc plate
The above materials have been carefully selected and have a well proven track record.
However, if there are any aggressive chemicals present then it is imperative that a risk
assessment is conducted. This must not be limited to just the pumped fluid but should
also include any other aggressive fluids in the intended operating environment.
9 Tube materials in ATEX applications
The following Watson-Marlow tube materials are suitable for use in ATEX
applications: l Pumpsil (platinum-cured silicone) l Marprene l Bioprene
l STA-PURE PCS l STA-PURE PFL .
Please note from the table below that there are limitations of length that can be
used for certain tube materials. Pumpsil cannot be used in any ATEX application
above the specified lengths listed. When using Bioprene and Marprene there is a
reduction in class suitability when they are in contact with Polymides.
Permissible length of tubing (cm) for IIB rating:
Series Bore(mm) Wall (mm) OD(mm) Pumpsil (cm)
313DA, 501RLA, 505LA 9.6 2.4 14.4 69
313DA, 501RLA, 505LA 8.0 2.4 12.8 78
313DA, 501RLA, 505LA 6.4 2.4 11.2 89
313DA, 501RLA, 505LA 4.8 2.4 9.6 10
313DA, 501RLA, 505LA 3.2 2.4 8.0 125
313DA, 501RLA, 505LA 1.6 2.4 6.4 156
313DA, 501RLA 8.0 1.6 11.2 89
313DA, 501RLA 6.4 1.6 9.6 104
313DA, 501RLA 4.8 1.6 8.0 125
313DA, 501RLA 3.2 1.6 6.4 156
313DA, 501RLA 2.4 1.6 5.6 179
313DA, 501RLA 1.6 1.6 4.8 208
* If length limit exceeded for STA-PURE PCS and STA-PURE PFL, ATEX rating
reduced to IIA
Permissible length of tubing (cm) for IIB rating:
Series STA-PURE PCS* (cm) STA-PURE PFL* (cm) Marprene Bioprene
313DA, 501RLA, 505LA 69 69 unlimited unlimited
313DA, 501RLA, 505LA 78 78 unlimited unlimited
313DA, 501RLA, 505LA 89 89 unlimited unlimited
313DA, 501RLA, 505LA 104 104 unlimited unlimited
313DA, 501RLA, 505LA 125 125 unlimited unlimited
313DA, 501RLA, 505LA 156 156 unlimited unlimited
313DA, 501RLA 89 89 unlimited unlimited
313DA, 501RLA 104 104 unlimited unlimited
313DA, 501RL 125 125 unlimited unlimited
313DA, 501RLA 156 156 unlimited unlimited
313DA, 501RLA 179 179 unlimited unlimited
313DA, 501RLA 208 208 unlimited unlimited
* If length limit exceeded for STA-PURE PCS and STA-PURE PFL, ATEX rating
reduced to IIA
10 Servicing and cleaning requirements
If aggressive liquids are spilled onto the pumphead, the head should be removed
and cleaned with a mild detergent. Remove any tubing from the pumphead.
The same cleaning procedure should be used to limit the build-up of dust (which
can become electrostatically charged and/or heated by friction).
The moving parts of the rotor should be checked from time to time for freedom of
movement. Pivot points and rollers should be lubricated occasionally with Teflon
lubricating oil.
The rotor shaft runs on sealed bearings which do not require lubrication.
11 Summary of modifications
ATEX features of 313/314 pumpheads
ATEX label: This is a requirement of the Directive and includes the ATEX rating for
the pumphead (Group II Category 2G IIB c T4).
ATEX manual: This is an addendum to the existing manual and includes ATEX
specific information.
300 Series pumpheads
ATEX Directive (94/9/EC)
PB0353/11
12 Replacements
Spares and replacements should be ordered through Watson-Marlow pumps or
through an offical representative. Only Watson-Marlow spares and replacements
should be used in order to guarantee continued compliance with the ATEX directive.
Watson-Marlow's policy is to provide spare parts for all products for a minimum of 7
years from discontinuation. The ability to implement this policy is not entirely within
Watson-Marlow's control and cannot be guaranteed, but every effort will be made to
honour this policy.
13 ATEX marking
313 and 314 ATEX (A) pumpheads have
been marked with these:
14 EC Declaration of Conformity
Description: 300 series ATEX compliant peristaltic pumpheads
Products:
033.3411.A00 313DA 3 roller, tongued drive fitting for 1.6mm wall tubing
033.3421.A00 313BA 3 roller, bareshaft fitting for 1.6mm wall tubing
033.3431.A00 313XA 3 roller, extension head for 1.6mm wall tubing
033.3441.000 313XBA 3 roller, bareshaft extension head for 1.6mm wall tubing
033.3511.A00 313D2A 3 roller, tongued drive fitting for 2.4mm wall tubing
033.3511.A0K 313D2AK 3 roller, tongued drive fitting for 2.4mm wall tubing
033.3521.A00 313B2A 3 roller, bareshaft fitting for 2.4mm wall tubing
033.3521.AM0 313B2A 3 roller, Manesty bareshaft fitting for 2.4mm wall tubing
033.3531.A00
313X2A
033.3541.A00 313XB2A 3 roller, bareshaft extension head for 2.4mm wall tubing
033.3541.AM0
313XB2A
033.4411.A00 314DA 4 roller, tongued drive fitting for 1.6mm wall tubing
033.4421.A00 314BA 4 roller, bareshaft fitting for 1.6mm wall tubing
033.4431.A00 314XA 4 roller, extension head for 1.6mm wall tubing
033.4441.A00 314XBA 4 roller, bareshaft extension head for 1.6mm wall tubing
033.4511.A00 314D2A 4 roller, tongued drive fitting for 2.4mm wall tubing
033.4521.A00 314B2A 4 roller, bareshaft fitting for 2.4mm wall tubing
033.4531.A00
314X2A
033.4541.A00 314XB2A 4 roller, bareshaft extension head for 2.4mm wall tubing.
Conformity: This document certifies that the above equipment complies with the
requirements of Directive 94/9/EC (the "ATEX" directive).
Rating: The pumps are rated as Group II, Category 2G equipment, with a T4
temperature classification, for use in IIB gas based environments.
II 2G IIB c T4
Standards: EN1127-1:2011 EN13463-1:2009 EN13463-5:2003 CLC/TR 50404:2003
Manufacturer: Watson-Marlow Limited, TR11 4RU, United Kingdom.
Notified body: Full details of the conformity assessment procedure can be found in
the technical reference file, "ATEX-WM". In accordance with the requirements of
Directive 94/9/EC a copy of this file has been archived with the following notified
body:
Baseefa (CE 1180), SK17 9RZ, England.
Date: 22nd December 2011
Signature
David Cole, Managing Director, Watson-Marlow Limited
3 roller, extension head for 2.4mm wall tubing
3 roller, Manesty bareshaft extension head for 2.4mm
wall tubing
4 roller, extension head for 2.4mm wall tubing
Watson-Marlow Pumps Group
Telephone +44 (0) 1326 370370
Fax +44 (0) 1326 376009 E-mail: info@wmpg.co.uk
www.wmpg.com
A Spirax Sarco Engineering Company
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