Watson-Marlow 120U/D1 - Manual (Page 30)

Watson-Marlow 400D1, 400DM2 and 400DM3 pumpheads: operating instructions 2
3.1 Pumphead
specifications
The 400D1 pumphead is designed to accept 1.6mm
wall thickness tubing in four different bore sizes.
The 400DM2 and 400DM3 pumpheads are designed
to accept three-bridge manifold tubing only.
3.2 400D1, 400DM2
and 400DM3 key
safety information
There are moving parts inside the pumphead.
Before opening the tool-unlockable pumphead
track, ensure that the following safety directions
are followed.
Ensure that the pump is isolated from the
mains power.
Ensure that there is no pressure in the pipeline.
If a tube failure has occurred, ensure that any
fluid in the pumphead has been allowed to
drain to a suitable vessel, container or drain.
Protective clothing and eye protection must be
worn if hazardous fluids are pumped.
3.3 400D1, 400DM2
and 400DM3
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 pipework and fittings
are suitably rated to handle the predicted
pipeline pressure.
If rigid pipework comes in close proximity to
the pumphead, a drop-out section of pipework
will simplify tube replacement.