Typical Diagram; V-Belt Transmission; Transmission Of Power From The Second Pto; Start-Up And Operation - Pratissoli MF7M Serie Manual De Uso Y Mantenimiento

9.8

Typical Diagram

For MF7M5B and MF7M7B pumps refer to Fig. 7.
RPM
For MF7M5D and MF7M7D pumps refer to Fig. 7/a.
RPM
9.9

V-belt transmission

As indicated in par. 9.1 in exceptional cases only, the pump
can be controlled by a V-belt system.
For proper layout sizing, consult with our Technical or
Customer Service Departments.
9.10

Transmission of power from the second PTO

Upon request, MF series pumps can be supplied with an
auxiliary PTO on the opposite side to the drive.
Transmission can be carried out:
- By means of the V-belts
- By means of the joint
By means of the V-Belts, withdrawable Max Torque is: 150 Nm
corresponding to 12.5 kW (17HP) at 800 rpm.
By means of the joint, withdrawable Max Torque is: 220 Nm
corresponding to 18.4 kW (25HP) at 800 rpm.
With transmission by means of the joint, pay
particular attention to perfect alignment so that
no transverse forces are generated on the pump
shaft.
For applications differing from those specified
above, contact our Technical or Customer Service
Departments.
10

START-UP AND OPERATION

10.1

Preliminary checks

Before start-up, ensure that:
min. value
max. value
The suction line is connected and pressurized
(see par. 9.4 - 9.5 - 9.6) and the graphs in par. 9.8.
1. The suction line ensures a hermetic seal over time.
2. Any shut-off valves between the supply source and the
pump are fully open. The outlet line is free discharge, to
permit rapid expulsion of the air present in the pump
manifold and therefore facilitate fast priming.
3. All suction and outlet fittings and connections are
properly tightened.
4. The coupling tolerances on the pump/transmission axis
(half-joint misalignment, Cardan joint tilt, belt pulling,
etc.) remain within limits required by the transmission
manufacturer.
Fig. 7
5. Oil in the pump casing is at the required level, verified with
a dipstick (pos. , Fig. 8).
min. value
max. value
Fig. 7/a
In case of prolonged storage or long-term
inactivity, check proper functioning of the
suction and outlet valves.
10.2

Start-up

1. At first start-up, verify that the rotation direction and the
supply pressure are correct.
2. Start-up the pump without any load.
3. Check that the supply pressure is correct.
4. Check that the rotation rpm during operation does not
exceed the nominal rpm of the pump.
5. Let the pump run for a period of no less than 3 minutes,
before putting it under pressure.
6. Before each pump stop, reset pressure by means of the
control valve or with any relieving devices and reduce to a
minimum rpm (activation with combustion motors).
26
1
Fig. 8