Rotation Direction; Version Change; Hydraulic Connections; Pump Supply - Pratissoli KS Serie Manual De Uso Y Mantenimiento

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) must not be rigidly
connected to the drive unit.
The following types of transmission are
recommended:
- Flexible coupling.
- Universal joint (comply with the maximum
working angles recommended by the
manufacturer).
- V-belts, permissible only for versions with no
reduction unit.
- Hydraulics by flange, for proper application
consult with our Technical or Customer Service
Departments.
9.2

Rotation direction

The pump's direction of rotation is indicated by an arrow on
the casing.
From a position facing the pump head, the drive rotation
direction must be:
- as in Fig. 5 for versions with a reduction unit;
- as in Fig. 5/a for versions with no reduction unit.
LH SIDE
clockwise
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 RH 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 versions shown in Fig. 5 and Fig. 5/a are RH.
The version can only be modified by trained and
authorized personnel and carefully following the
instructions below:
In addition it is possible to position the reduction unit in
4 different positions as per Fig. 6.
9.4
RH SIDE
In order to isolate the system from vibrations produced by
anticlockwise
the pump, it is advisable to make the first section of the duct
Fig. 5 adjacent to the pump (both suction and outlet) with flexible
piping. The suction hose must be sufficiently rigid to prevent
deformation due to the negative pressure exerted by the
action of the pump.
9.5
KS pumps require a minimum positive suction head (NPSHr),
measured on the head suction flange, indicated in the
following table (obtainable with the booster pump):
RH SIDE
The booster supply pump must have the following features:
anticlockwise
Flow rate at least twice the rated flow rate of the plunger
pump with a sufficient minimum pressure for the required
NPSHr and max 6 bar.
Fig. 5/a
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.
38
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 from the plastic plugs
provided for the previous version.
3. Unite the hydraulic part to the mechanical
part as indicated in chapter 2 par. 2.2.2 of the
Repair manual.
The position of the reduction unit can only be
changed by authorized specialized personnel
meticulously following the instructions in the
repair manual.

Hydraulic connections

Pump supply

KS 28 KS 32
NPSH (m)
2.0 2.5
r
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.
Fig. 6
KS 36 KS 40
3.0 4.0