Pratissoli VFH Serie Manuel D'utilisation Et D'entretien page 28

9.10 V-belt transmission
The pump can be controlled by a V-belt system.
For this pump model, we recommend use of 4 XPB belts
(16.5x13 serrated). Use an XPC profile only for long durations.
Both the characteristics and transmissible power of each
belt can be verified in the diagram in Fig. 8, in relation to the
number of rpm normally declared by the manufacturer.
Minimum duct pulley diameter (on pump shaft): ≥ 250 mm.
The radial load on the shaft must not exceed 7500 N
(value necessary for Layout definition). The transmission is
considered adequate if the load is applied to a maximum
distance a=40 mm from the shaft shoulder (P.T.O) as shown in
Fig. 11.
For dimensions differing from those specified
above, contact our Technical or Customer Service
Departments.
9.11 Transmission definition
To prevent irregular radial loads on the shaft and the relative
bearing, follow these directions:
a) Use pulleys with V-belts with the size of the groove
required/recommended by the manufacturer of belt used.
In the absence of directions, follow Fig. 9 and the table in
Fig. 10.
Break
corners
Single groove Multiple groove
Fig. 9
28
Fig. 8