4.4.1
4.4.2
9
4 5 6 7 8
1 2 3
4.4.3
4.4.4
Page 35
of
68
INDUSTRIAL PUMPS
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Chapter 4 - Transport and Positioning
Translation of original instructions - S
CUBIC -
S
BOXER
rev
. 2021
ONLY
Air Filter
NO
OIL
ONLY
for glycol
Min 2 bar
Max 8 bar
4.4 PNEUMATIC CONNECTION
Connection operations to the pneumatic system are reserved for qualified Installation Technicians and
,
equipped with suitable Personal Protection Equipment, who know and comply with the contents of this
Manual. After completing the installation operations, the pump can be connected to the pneumatic supply
circuit as follows:
Pneumatic system requirements
•
Supply with non-lubricated, dried air, with suitable pressure (Min 2 bar - Max 8 bar);
• Use of pneumatic components with air flow rates suitable for the pneumatic circuit of the pump;
•
Glycol adder for installations with strong delivery heads and/or back-pressures;
•
Installation of a shut-off valve, 3-way valve and check valve on the air supply;
•
Installation of air discharge pipe (with collection) outside of harsh and potentially explosive atmos-
pheres and for pumping flammable or toxic fluids.
4.4.1
Remove the adhesive from the pump air connections.
CAUTION
: danger of pump blocking.
The pneumatic supply of the S
CUBIC and
S
BOXER
pumps must be carried out with UNLUBRICATED, FIL-
TERED, AND DRY compressed air with a pressure of not less than 2 bar and not more than 8 bar.
4.4.2
Screw two fittings of suitable diameter onto the pneumatic circuit connections of the pump, for the supply
connection to the piloting valve.
POS.
COMPONENT
1
Air pump
2
2/3-way valve or Oscillator
3
Pressure gauge
4
3-way valve - air discharge (START - STOP)
5
Check valve
6
Soft start valve
7
Filter/Regulator (20µ - micron)
8
3-way valve - interlockable (EMERGENCY)
9
Pressure Relief Valve
4.4.3
Set up a pneumatic oscillator, or a 2/3-way pneumatic valve (for remote control from PLC) and a valve
(START - STOP with air exhaust)
, according to the diagram in the figure.
To check the actual pressure of the supply air, a pressure gauge must be installed on the compressed air
line near the pump itself and the value checked when the pump is running.
CAUTION:
danger of fluid entering the compressed air circuit and being discharged into the environment.
It is forbidden to install the pump without a 3-way valve
(START - STOP)
and/or a non-return valve to prevent
the pumped fluid from entering the pneumatic circuit in the event of a rupture of the diaphragms.
Even in battery installations, the check valve must always be installed on each pump.
4.4.4
Install a 3-way valve for the emergency stop control (disconnecting switch with interlock) in a protected and
easily accessible position, upstream of the pneumatic circuit supplying the pump.
4.4.5
Installations where operation with many Start / Stop cycles is expected (with high delivery heads and / or
with strong back-pressures) require the installation of a pneumatic soft start valve to protect the product
diaphragms.
NOTE
The installation of the soft start pneumatic valve, in addition to allowing a more uniform and fluid pump
-
ing of the product during the start-up phase, allows the protection of the diaphragms and preserves the
operating life of the pump.