Watson-Marlow 620R - Manual (Page 2)

Watson-Marlow Bredel E-Manuals
http://www.watson-marlow.co.uk/pdfs-global/m-620r-gb-01.htm[02/02/2012 14:33:33]
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 Watson-
Marlow Limited unless expressly approved in writing by a Director or Manager of Watson-
Marlow 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.