en – Original instructions
e-IXPS - Installation, Operation and Maintenance Instructions
17
4.3
Hydraulic connection
4.3.1
Precautions
WARNING:
The piping system must be sized to ensure safety at the maximum operating pressure and
temperature.
WARNING: Danger of hot and/or toxic liquid escaping from non-sealed piping system
connections
Support the piping system independently to prevent them from weighing on the unit. Secure
the piping system to the unit ports making sure to comply with the permitted forces and
torques. Install appropriate gaskets between the unit and the piping system.
WARNING: Hot surface hazard
If the temperature exceeds 60°C (140°F), isolate the unit before touching it.
NOTE:
When carrying out welding activities never use the unit for grounding: risk of pitting damage
to the bearings.
CAUTION: Residues from welding work or other impurities in the pipes lead to pump damage
The type and the duration of the cleaning activity during the flush and pickling operations must
be in accordance with the used casing and sealing materials.
Use a filter with 0.5 mm mesh and 0.25 mm wire diameter made of corrosion-resistant material.
Insert a filter with a section three times that of the pipeline.
4.3.2
Guidelines for the hydraulic system
1.
Support the piping system independently to prevent them from weighing on the unit.
2.
Remove any welding residues, deposits and impurities from the piping system in order to
avoid damage to the unit: the method and duration of the cleaning operation must be
adapted to the materials of the unit and the gaskets.
3.
To reduce the transmission of vibrations between the unit and the system and vice versa,
install:
•
Anti-vibration joints on the suction and discharge sides of the unit
•
Dampers between the unit and the surface on which it is installed.
4.
In order to reduce flow resistance, the pipe on the suction side must be:
•
As short and as straight as possible
•
For the section connected to the unit, straight and without bottlenecks, covering a
length equal to at least six times the diameter of the suction port
•
Wider than the suction port; if necessary, install an eccentric reducer that is horizontal on
top
•
Without bends; if this cannot be avoided, bends of a radius as wide as possible
•
Without traps and 'goosenecks'
•
With valves with a low specific flow resistance.
5.
Install a check valve on the discharge side to prevent the liquid from flowing back into the
pump unit when this is at standstill.
6.
Install a pressure gauge (or a vacuum pressure gauge, in case of suction lift installation) on
the suction side, and a pressure gauge on the discharge side, for checking the actual
operating pressure of the pump unit.
