Watson-Marlow 323Dz - Manual (Page 42)

Watson-Marlow 323Dz User Manual 42
21 Pumpheads
21.1 Pumpheads: key safety information
Before opening the pumphead track please
ensure that the following safety directions are
followed.
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 to a suitable drain.
Ensure that protective clothing and eye protection are worn if hazardous prod-
ucts are being pumped.
21.2 313D and 314D pumpheads
The 313D pumphead has three rollers and is designed to provide higher flow rates.
The 314D pumphead has four rollers to provide greater pumping precision with less
pulsation in the flow. Both designs are available for 1.6mm and 2.4mm wall tubes.
New tubing can be loaded easily into the flip top design. The top closes with a “clamp
and stretch” action to locate the tube in the correct position and with the correct ten-
sion.
Standard and extension pumpheads are bayonet mounted. This ensures easy clean-
ing and fast set up.
Tube selection
The chemical compatibility list published in the Watson-Marlow web site is only a
guide. If in doubt request a tube sample card for immersion trials.
314D pumpheads should run no faster than 300 rpm
when in continuous use. Speeds up to 400 rpm are per-
missible for intermittent use.