Watson-Marlow 620R User Manual

Watson-Marlow Bredel E-Manuals

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WATSON-MARLOW BREDEL E-MANUALS

m-620r-gb-01

Watson-Marlow 620R, 620RE and
620RE4 pumpheads

Clickable index

1. Declaration of incorporation

2. One-year warranty

3. Information for returning pumps

4. Safety

5. Recommended operating
procedures

6. 620RE, 620RE4 and 620R Key
safety information

7. 620RE, 620RE4 and 620R Safe­guarding

8. 620RE, 620RE4 and 620R
Pumping conditions

9. 620RE, 620RE4 and 620R Pump
installation

10. 620RE, 620RE4 and 620R
General operation

Double clicking anywhere in the manual will take you back to this index.

Declaration of incorporation

When this pump unit is to be installed into a machine or is to be assembled with other
machines for installations, it must not be put into service until the relevant machinery has
been declared in conformity with the Machinery Directive 2006/42/EC.

11. 620RE and 620RE4 tube element loading

12. 620RE, 620RE4 and 620R Continuous tube
loading

13. 620RE, 620RE4 and 620R Tube element or
continuous tube removal

14. 620RE, 620RE4 and 620R Maintenance

15. 620RE, 620RE4 and 620R CIP and SIP

16. Pumphead spares

17. Technical data: performance envelope and
flow rates

18. 620R product codes

19. 620RE and 620RE4 LoadSure product codes

20. Trademarks and disclaimer

21. Warning not to use pumps in patient­connected applications

22. Publication history

23. Decontamination certificate

Responsible person: Christopher Gadsden, Managing Director, Watson-Marlow Limited,
Falmouth, Cornwall TR11 4RU, England. Telephone [phone] Fax +44 (0)
1326 376009.

One-year warranty

Watson-Marlow Limited warrants, subject to the conditions below, through either Watson­Marlow Limited, its subsidiaries, or its authorised distributors, to repair or replace free of
charge, including labour, any part of this product which fails within one year of delivery of
the product to the end user. Such failure must have occurred because of defect in material
or workmanship and not as a result of operation of the product other than in accordance
with the instructions given in this manual.

Conditions of and specific exceptions to the above warranty are

Consumable items such as tubing and rollers are excluded.
Products must be returned by pre-arrangement carriage paid to Watson-Marlow Limited,
its subsidiaries, or its authorised distributor.
All repairs or modifications must have been made by Watson-Marlow Limited, its
subsidiaries, or its authorised distributors or with the express permission of Watson­Marlow Limited, its subsidiaries, or its authorised distributors.
Products which have been abused, misused, or subjected to malicious or accidental
damage or electrical surge are excluded.

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Watson-Marlow Bredel E-Manuals

Warranties purporting to be on behalf of Watson-Marlow Limited made by any person,
including representatives of Watson-Marlow Limited, its subsidiaries, or its distributors,
which do not accord with the terms of this warranty shall not be binding upon Watson­Marlow Limited unless expressly approved in writing by a Director or Manager of Watson­Marlow Limited.

Information for returning pumps

Equipment which has been contaminated with, or exposed to, body fluids, toxic chemicals
or any other substance hazardous to health must be decontaminated before it is returned
to Watson-Marlow or its distributor. A certificate included at the rear of these operating
instructions, or signed statement, must be attached to the outside of the shipping carton.
This certificate is required even if the pump is unused. If the pump has been used, the
fluids that have been in contact with the pump and the cleaning procedure must be
specified along with a statement that the equipment has been decontaminated.

Safety

In the interests of safety, this pump and the tubing selected should only be used by
competent, suitably trained personnel after they have read and understood this manual,
and considered any hazard involved.

Any person who is involved in the installation or maintenance of this equipment should be
fully competent to carry out the work. In the UK this person should also be familiar with
the Health and Safety at Work Act 1974.

Recommended operating procedures

DO keep delivery and suction lines as short as possible using a minimum number of swept
bends.
DO use suction and delivery pipelines with a bore equal to or larger than the bore of the
tube fitted in the pumphead. When pumping viscous fluids, the losses caused by increased
friction can be overcome by using pipe runs with a cross sectional area several times
greater than the pumping element.
DO fit an extra length of pump tube in the system to enable tube transfer. This will extend
tube life and minimise the downtime of the pumping circuit.
DO keep the track and rollers clean.

The self-priming nature of peristaltic pumps means valves are not required. Any valves
fitted must cause no restriction to flow in the pumping circuit.

When using Marprene tubing, after the first 30 minutes of running, re-tension the tube in
the pumphead. Open the guard, hold the tubing at one port whilst pulling the tube tight
through the second port. This is to counteract the normal stretching that occurs with
Marprene which can go unnoticed and result in poor tube life.

Tube selection The chemical compatibility list published in the Watson-Marlow catalogue
is only a guide. If in doubt about the compatibility of a tube material and the duty fluid,
request a tube sample card for immersion trials.

620RE, 620RE4 and 620R Key safety information

Before opening the pumphead guard please ensure that the
following safety directions are followed.

For close-coupled drives, ensure that the pump is isolated from mains voltage.
Ensure that there is no pressure in the pipeline.
If a tube failure has occurred, ensure that any product in the pumphead has been
allowed to drain through the controlled waste to a suitable drain.
Ensure that protective clothing and eye protection are worn if hazardous products
are being pumped.

620RE, 620RE4 and 620R Safe-guarding

Primary safety on 620 series pumps is provided by the tool-lockable pumphead
guard. On electrically-powered cased 600 series pumps, secondary (backup)
protection is provided in the form of an electrical interlock which stops the pump if
the pumphead guard is opened (and only for so long as the guard is opened). The
electrical interlock on cased pumps should never be used as primary protection.

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Watson-Marlow Bredel E-Manuals

Always disconnect the mains power supply to the pump before opening the

pumphead guard.
Only primary protection through the tool-lockable guard is provided on pneumatically
powered 620 series cased pumps. Only primary protection through the tool lockable
pumphead guard is provided on 620 series pumps fitted with industrial AC motors,
but an interface kit to allow mains power to be switched by the pumphead guard
interlock is available as an extra-cost option.

620RE, 620RE4 and 620R Pumping conditions

Pressure and viscosity

All pressure values in this operating instruction, from which performance and life
figures have been calculated relate to peak pipeline pressures.
Although rated to 4 bar working pressure, this pump will generate in excess of 4 bar
working pressure if pipeline restrictions are in place. In instances where it is critical
that a working pressure of 4 bar is not exceeded, pressure relief valves should be
installed in the pipeline.
For pumping duties of 2-4 bar pressure, only close coupled pumps should be used,
fitted with 73 Shore hardness Marprene/Bioprene or standard STA-PURE tube
elements. "M" in the tube element’s product order code denotes suitability for high
pressure use.
When pumping duties of 0-2 bar pressure, use close coupled or cased pumps fitted
with 64 Shore hardness elements or the standard range of continuous peristaltic
pump tubing.
Viscosity handling is maximised by using 73 Shore hardness Marprene/Bioprene or
STA-PURE tube elements in the pumphead.
Ensure that there is always a minimum of one metre of smooth bore flexible tubing
connected to the discharge port of the pumphead. This will help minimise any
impulse losses and pulsation in the pipeline. This is especially important with viscous
fluids and rigid pipework.

620RE, 620RE4 and 620R Pump installation

A correctly engineered installation will promote the best possible tube life, so please ensure
that the following guidelines are followed:

Avoid tight pipeline bends, pipe reducers and excessive lengths of smaller bore
tubing than that in the pumphead, particularly in pipelines on the suction side.
Ensure that connecting pipe work and fittings are suitably rated to handle the
predicted pipeline pressure.
If rigid pipe work comes in close proximity to the pumphead, a drop out section of
pipe work will simplify tube replacement.
Ensure that the controlled waste blanking plug is in position if the controlled waste
port is not in use. See below.

It is advisable to use controlled waste pipe work if pumping hazardous, aggressive
or abrasive fluids or products which will harden in contact with air.
When connecting waste pipe work to the controlled waste port using the coupling
adaptor supplied, ensure that there is adequate clearance underneath the
pumphead. Waste pipe work should run to a suitable container or drain.
The leak detector installation procedure is included in the leak detector kit.
If unsure of an installation please contact your local Watson-Marlow Technical
Support Office for further assistance.

620RE, 620RE4 and 620R General operation

Opening the pumphead guard

Unlock the guard with a 5mm Allen key or a screw driver.

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Watson-Marlow Bredel E-Manuals

Open the guard to its full extent. This creates the maximum clearance between the

tube ports and guard to remove the tubing.

Engaging/disengaging the rollers

The extent of travel of the roller release levers is indicated below. Do not try and
force the levers beyond their normal extent of travel as this will damage the rotor.
To engage the rollers snap the roller release levers counter clockwise making sure
that the rollers locked out against the tubing. To disengage the rollers, snap the
release levers clockwise to their disengaged position. For high pressure tubing
elements or four roller pumpheads, the 5mm Allen key can be used to aid leverage
when engaging/disengaging the rollers with the release levers.

Make sure that fingers are clear of the front face of the rotor hub
when using the roller release levers.

Pre-load checks

Before loading tubing, ensure that all rollers rotate freely, that the tube ports and
location grooves are clean and that if in use, the controlled waste pipe work is free
of any obstructions.

Closing the pumphead guard and start-up

Ensure that the guard seal is clean, replacing it if necessary.
Ensure that the rollers are engaged and locked out against the tubing
Close the guard and push it against the track until the latch engages.
Connect suitable pipe work to the pumphead using the appropriate connectors for
the tube element.

Continuous tubing clamp location in 620R pumpheads

Select the appropriate tube clamp set for the tubing size to be used.
Locate the two "U"-shaped track clamp halves into the pumphead ports (The "U"­shape ensures correct loading)
Locate the corresponding guard clamp halves which have raised "T" locating
sections, into the slots on the inner guard face above and below the guard hinge.
Push and slide into their locked position.
Closing the guard will align the two halves of the clamp around the tubing.

620RE and 620RE4 tube element loading

620RE element pumpheads are factory set to accept Watson-Marlow LoadSure tube
elements. Pumping performance will be adversely affected if LoadSure elements are
not used.
Disengage rollers
Locate one of the "D"-shaped flanges into the lower port. (The "D" flange ensures
that the element can only be loaded correctly).
Wrap the tube element around the disengaged rollers of the rotor.
Locate the second "D"-shaped flange into the upper port.
Ensure the flat face of each "D" flange sits flush to the flange sealing face of the
track.
Engage rollers
Close the guard and push it against the track until the latch engages.

Tube element loading

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Watson-Marlow Bredel E-Manuals

620RE, 620RE4 and 620R Continuous tube loading

620R continuous tubing pumpheads are factory set to accept Watson-Marlow 600
series 3.2mm wall tubing. Pumping performance will be adversely affected if
Watson-Marlow tubing is not used.
Select the tube clamp set which is correct for the tubing size to be used.
Disengage rollers
Locate one end of the tubing into the lower port "U" clamp and hold firmly in
position.
Wrap the tubing tightly around the retracted rollers, making sure that there is no
twisting through its length.
Locate the other end of the tubing into the upper port "U" clamp.
Hold both ends of the tubing in one hand maintaining tension around the retracted
rollers.
Engage rollers
Close the guard and push it against the track until the latch engages
Ensure that continuous tubing is not loosely clamped at the pumphead ports.
Ensure that when the pump is re-started all of the rollers have re-engaged. A roller
which has not re-engaged will "click" continuously. No damage will occur if this
happens but the roller should be re-engaged manually using the 5mm Allen key.
Please refer to the Troubleshooting section.

Continuous tube loading

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Watson-Marlow Bredel E-Manuals

620RE, 620RE4 and 620R Tube element or continuous tube removal

Unlock the guard and disengage the rollers.
Disconnect the tubing from the external pipeline.
Remove the tubing from the pumphead.

620RE, 620RE4 and 620R Maintenance

Scheduled maintenance

The stainless steel pumping rollers run on sealed bearings and do not require
lubrication.
Remove the rotor and lubricate the follower rollers and roller engaging mechanisms
with a lithium-based grease. This should be carried out every six months for
intermittent duties and every three months for 24 hour duties.
If fluid is spilled inside the pumphead, flush the pumphead out with water and mild
detergent as soon as possible. If specific cleaning agents are required to clean the
spillage, please consult Watson-Marlow Technical Support Office before proceeding,
in order to confirm chemical compatibility.
If the rotor needs to be removed, refer to the guidelines below.

Roller adjustment

620 pumpheads have provision for adjustment to reset the roller/track gap to compensate
for wear after extended service in arduous applications.

Roller/track gaps can only be accurately judged without tubing in the pumphead. The gap
should be 4.6mm for 3.2mm wall tubing and 5.5mm for LoadSure elements.

If the gap is more than 0.2mm greater than these dimensions, the following may be
carried out:

Note the number on the roller arm to which the engraved line on the hexagon­headed main roller pin corresponds.
Remove the circlip (snap-ring) and roller pin.
Relocate the main roller pin, resetting the engraved line to one number lower. For
example, if the engraved line was at "-1", reset it to "-2" to reduce the roller track
gap.

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