Select the peristaltic tubing diameter that gives the desired
flow rate after referring to Flow Rate Selection and Adjustment
on page 33. These graphs represent the values obtained in
laboratory tests, where the liquid was allowed to flow freely from the
tubing against atmospheric pressure only. There was no additional
backpressure (e.g., a chromatographic column).
The selection of peristaltic tubing is a compromise between
minimizing the pulsations and maximizing the lifetime of the tubing.
When making this choice, the following points should be considered:
• the smaller the diameter, the smaller the pulsations and the faster
the head has to rotate, leading to a reduction of peristaltic tubing
lifetime
• the bigger the diameter, the bigger the pulsations, and the
slower the head has to rotate, leading to increased peristaltic
tubing lifetime. That is, the pulsations increase when the flow
rate decreases, and when the internal diameter of the tubing
increases.
Fitting the Tubing
Before fitting the tubing, remove the safety cover. Install the safety
cover before operating the pump.
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MINIPULS® 3 PERISTALTIC PUMP | USER'S GUIDE
TUBING - SELECTION AND FITTING