Watson-Marlow 114 - Manual (Page 9)

Watson-Marlow Alitea 114 pumpheads: operating instructions 9
7 Tube holder positioning
The pumphead can be adjusted to accommodate 1.6mm wall tubing in sizes from
0.5mm bore to 4.8mm bore.
Inner position, for small tubing Outer position, for large tubing
With the smaller bore tubes of 0.5mm, 0.8mm and 1.6mm the inner position must
be used to prevent the risk of tube slipping through the clamps and wandering
across the rollers causing premature tube rupture.
With the larger bore tubes of 4.0mm and 4.8mm the outer position must be used to
prevent the flow rate being excessively reduced.
For tubing bores of 2.4mm and 3.2mm either setting may be used, as appropriate
for the application. The inner setting will clamp the tube harder, reducing tube slip
but has the potential to marginally reduce flow rate. The outer setting will optimise
flow rate but the risk of tube slip is increased.
114DV, 114DVP
Tube holder position
Tube bore size 0.5mm 0.8mm 1.6mm 2.4mm 3.2mm 4.0mm 4.8mm
Inner
Outer