General Pump VF Owner Manual - Manual (Page 11)

GENERAL PUMP
A member of the Interpump Group
VF SERIES
Page 11
The diagram does not take into consideration the
hose and valve resistance, the pressure drop due
to the hose length, the viscosity and the tempera-
ture of the pumped fluid. If necessary, contact our
Customer Service Department.
9.10 V-belt Transmission
The pump may be driven by a v-belt system. For this
pump model, we suggest to use 4 XPB belts (16.5 x 13
cogged); only for long durations, use the XPC profile; both
the characteristics and the power transmission capacity of
each belt can be verified on the diagram in fig. 8, in func-
tion of the number of rotations normally declared by the
Manufacturer. Minimum diameter of the driven pulley (on
the pump shaft): ≥ 250 mm. The radial load on the shaft
must not be greater than 7500 N (value required for the
definition of the lay-out). The transmission is considered
adequate if this load is applied at a maximum distance of
40 mm from the shaft shoulder (PTO) as indicated in fig.
11.
For sizing that differs from that indicated above,
please, contact our Customer Service
Department.
9.11 Transmission Definition
To avoid abnormal radial loads on the shaft and its related
bearing, please comply with the following indications
a) Use pulleys for v-belts with race dimensions
prescribed/ recommended by the belt Manufacturer.
Should no indications be supplied, please see fig.
9 and the table in fig. 10.
fig. 9
Dimensions (in mm)
fig. 10
2) Use high efficiency belts - for example XPB instead of
SPB; this will allow to use a lower number of belts to
transmit the same power, and consequently a minor
distance of the resultant from the shaft shoulder
(PTO) “a” in fig. 11.
fig. 11
Ref 300662 Rev.C
06-12