V-Belt Transmission; Start-Up And Operation; Preliminary Checks; Start-Up - Pratissoli MK2 Serie Manual De Uso Y Mantenimiento

9.10

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.
10

START-UP AND OPERATION

10.1

Preliminary checks

Before start-up, ensure that:
The suction line is connected and pressurized
(see chapter 9): the pump must never run dry.
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.
5. Oil in the pump casing is at the required level, verified with
the dipsticks (pos. ,Fig. 8).
1
In case of prolonged storage or long-term
inactivity, you need to restore the proper
functioning of the suction valves by opening the
three valve-lift devices (see pos.  Fig. 9). Make
sure you have closed the valves before starting
the pump.
For the "work" and "rest" positions, see Fig. 10.
VALVE CLOSED
- WORK POSITION -
1
10.2
1. At first start-up, verify that the rotation direction is correct.
2. Check that the pump is fed correctly.
3. Start-up the pump without any load.
4. Check that the rotation rpm during operation does not
exceed the nominal rpm of the pump.
5. Allow the pump run for no less than 3 minutes before
pressurizing it.
6. Before each pump stop, reset pressure by means of the
control valve or with any pressure relief devices.
Fig. 8
45
SAFETY DEVICE
RELEASE

Start-up

Should there be any priming trouble due to
insufficient supply, it is possible to remove the
three plugs in front of the head (except for the
MK240 version) as shown in pos.  Fig. 11.
2
Fig. 9
VALVE OPEN
- REST POSITION -
Fig. 10
3
Fig. 11