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Figure 7.
A C50 Peristaltic pump installed in the FlowCAM
Occlusion Tubing
There are three sizes of occlusion tubes used with the peristaltic pumps. Each tube has a specific length
and tube diameter that determines the appropriate flow rate (and an associated part number for
reordering). Part number C55 is for the small pump tubing, C56 is for the medium size tubing, and C57
is for the large tubing. Note inner tube lengths are 4 inches for C55 with 3.5 inches for the C56 & C57.
The tubes are also identified by markings found on the ends of each tube. The C55 tubing has a green
line on its spacer, C56 has a red line on its spacer, and the C57 has no color line on its spacer. There is
an adaptor for the C57 spacer when 800 and 1000 µm flow cells are used. This adaptor connects from
the input side of the pump to the output side of the flow cell.
Changing the occlusion tubing is relatively simple. The colored (blue) case on the front of the pump
head can be removed by pulling up on the plastic area between the inlet and outlet as seen in Figure 8.
Next remove the occlusion tube and roller assembly as indicated. To install the new tubing set, wrap the
tube around the roller assembly and slide it back into the pump head making sure the tube is seated
between the rollers and the edge of the pump head enclosure (and not sitting on top of the rollers).
While holding the ends of the tubes by the spacers, snap the blue enclosure back onto the pump head.
Note: the tubing should not be left in the pump head with the pump turned off for long periods of
time-such as overnight or weekends.
Figure 8.
Removing the case and roller assembly
