Pump Installation; Installation; Rotation Direction; Version Change - Pratissoli VF Série Manuel D'utilisation Et D'entretien

9

PUMP INSTALLATION

9.1

Installation

The pump must be fixed horizontally using the M16x1.5
threaded support feet. Tighten the screws with a torque of 210
Nm.
The base must be perfectly flat and rigid enough as not to
allow bending or misalignment on the pump coupling axis /
transmission due to torque transmitted during operation.
The unit cannot be fixed rigidly to the floor but must
interposed with vibration dampers.
For special applications contact the Technical or Customer
Service Departments.
A lifting bracket is mounted on the pump for easy installation,
as per the figure below.
Should it be necessary to disassemble it, to avoid the entrance
of dirt in the front part of the casing, close the threaded hole
with the cap provided.
Replace the oil filling hole closing service plug
(red) positioned on the rear casing cover. Check
the correct quantity with the oil dipstick.
The oil dipstick must always be reachable, even
when the unit is assembled.
The pump shaft (PTO) should not be rigidly
connected to the propulsion unit.
The following types of transmission are
recommended:
- Hydraulics by flange, for proper application
consult with our Technical or Customer Service
Departments.
- Belts.
- Cardan-shaft (comply with manufacturer's Max.
recommended working angles).
- Flexible joint.
9.2

Rotation direction

The rotation direction is indicated by an arrow located on the
casing near the drive shaft.
From a position facing the pump head, the rotation direction
will be as in Fig. 6.
LH SIDE
clockwise
9.3

Version change

The pump version is defined as right when:
Observing the pump facing the head side, the pump shaft
must have a PTO shank on the right side.
The pump version is defined as left when:
Observing the pump facing the head side, the pump shaft
must have a PTO shank on the left side.
Note. The version shown in Fig. 6 is right.
The version can only be modified by trained and
authorised personnel and carefully following the
instructions below:
1. Separate the hydraulic part from the mechanical
part as indicated in chapter 2 par. 2.2.1 of the
Repair manual.
2. Turn the mechanical part 180° and reposition
the rear casing cover in such a way that the
oil dipstick is turned upward. Reposition the
lifting bracket and relative hole closing plugs
in the upper part of the casing. Finally, properly
reposition the specification label in its housing
on the casing.
Make sure that the lower casing draining
holes in correspondence with the pistons
are open and not closed by the plastic plugs
provided.
3. Unite the hydraulic part to the mechanical part
as indicated in chapter 2 par. 2.2.2 of the Repair
manual.
9.4

Hydraulic connections

In order to isolate the system from vibrations produced by the
pump, it is advisable to make the first section of the duct adja-
cent to the pump (both suction and outlet) with flexible piping.
The consistency of the suction section must be such as to pre-
vent deformations caused by vacuums produced by the pump.
9.5

Pump supply

VF pumps require a positive suction head (NPSHr) of between
5 and 7 bar measured at the head inlet.
The booster supply pump must have the following features: at
least twice the flow rate of the plunger pump's rated flow rate
with a minimum pressure of 5 bar
These supply conditions must be observed at all operating
speeds. The operation of the booster pump must be
independent from that of the plunger pump.
The booster pump must always be started up
before the plunger pump.
It is advisable to install a pressure switch on the
supply line downstream of the filters protecting
the pump.
25
RH SIDE
anticlockwise
Fig. 6