Watson-Marlow 620R - Manual (Page 3)

Watson-Marlow Bredel E-Manuals
http://www.watson-marlow.co.uk/pdfs-global/m-620r-gb-01.htm[02/02/2012 14:33:33]
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.