Aalborg TPV - Manual (Page 6)

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1.2.2 TPV Models
The TPV models, which have a pump head with 3 rollers, are
variable speed pumps, powered by a brushless 24 V DC motor,
can be user-set from 0 to 300 rpm. Pumping direction is
reversible.
Figure 2: One Model TPV Pump: the TPVAD
1.2.3 TP1 & TP2 Pump Head Models
The TP1 and TP2 models are stand alone pump heads with a
safety cover. They are not equipped with control panel, motor
or rigid case. The TP1 model has 4 rollers, while the TP2 model
has 10 rollers.