TapFlo PTL Series, Manual

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3. MAINTENANCE
IOM manual Tapflo PTL Hose pumps
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3.11. Rollers adjustment
During pump operation as the hose starts to wear, back flow inside the hose can occur. In order
to avoid this, roller adjustment can be performed in order to increase the compression of the hose.
This is an important procedure, as back flow reduces the hose lifetime and affect the pump flow.
The adjustments vary based on pump rotation speed, discharge pressure and liquid viscosity. This
operation can be done without complete pump disassembly.
NOTE! Proceed with this procedure only after familiarizing oneself with the instructions at the
beginning of chapter 3. “ Maintenance ” and all safety instruction in chapter 1.8. “ Health and safety ” .
Fig. 3.9.1
Run the pump and position the rotor so that only one
roller is pressing against the hose.
Fig. 3.9.2
Disconnect power supply from the motor. Unscrew
the front cover mounting bolts [141] and remove
them with their washers [142].
Fig. 3.9.3
Remove the front cover [12].
Fig. 3.9.4a PTL9 – PTL25
On the side where the roller is pressing the hose,
loosen the roller bracket mounting screws [941].
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