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8.4.
Adjusting the roller pressure
- The peristaltic pump is equipped with shims, in order to adjust the precise dis-
tance from the axis of rotation to the roller for correct hose compression (also
dependent on speed and operating pressure).
- In order to achieve optimal life of the pump hose, the compression force of the
pump hose can be adjusted by placing a number of shims under the pressing
roller. The shims (2) are fitted between the rotor (1) and the pressing roller (3). The
number of shims will vary for each counter pressure situation.
Shims placement
Squeezing the hose
1.
Hose in normal shape.
2.
Insufficient squeezing (back flowing media in the cavity will destroy the hose
within a short period of time).
3.
Perfect squeezing.
4.
Excessive squeezing (increased wear and tear to pump and hose).
The shims are fitted in the factory. The number of shims can be adapted to the actual
operating conditions according to the following tables. Slight variations in colour of polyu-
rethane rollers is normal.
15
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