Watson-Marlow 900 Series - Manual (Page 13)

Page 13
Shoe adjustment
Normally when a pump is set up for an application there will be no need to re-
adjust the shim setting.
The occlusion of the tube is
adjusted by varying the number of
shims that are between the shoe
and the rotor.
To add or remove shims loosen
the hexagon screw (13mm A/F)
several turns.
Check that the number of shims fitted under the sliding shoe is suitable for the
operating conditions of the pump.
25mm and 19mm 10-15 bar 5-10 bar 2-5 bar 0-2 bar
0-25 rpm 5 4 3 1
25-50 rpm 4 3 2 1
50-75 rpm 4 3 2 1
75-100 rpm 3 3 1 0
40mm and 45mm 10-15 bar 5-10 bar 2-5 bar 0-2 bar
0-25 rpm 4 3 2 1
25-50 rpm 4 3 2 1
50-75 rpm 3 2 1 1
75-100 rpm 3 2 1 1
Increasing the number of shims under the sliding shoes will increase
tube occlusion for higher pressure operation.
This will reduce the overall tube life when compared to using fewer
shims for lower pressure operation. For temperatures above 60C - use
one shim less.