4.4.8 4.4.8
4.4.7
4.4.6
4.4.9
Page 36
of
68
INDUSTRIAL PUMPS
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.debem.com
Chapter 4 - Transport and Positioning
Translation of original instructions -
S
CUBIC-
S
BOXER
rev.
2021
MIN 2 bar
MAX 8 bar
4.4.6
For pump installations with high delivery heads and/or with strong back-pressures, the pneumatic circuit
discharges may freeze.
CAUTION:
danger of loss of efficiency and/or pump shutdown.
With high heads and/or high viscosity, a glycol dispenser should be installed on the air supply line
upstream of the pump.
4.4.7
Air discharges from the pneumatic circuit must always take place in a free atmosphere, free of dust
and saturated vapours which could damage the internal circuit. In the event of a total rupture of the dia-
phragms, fluid can enter the pneumatic circuit, damage it and escape through the drains.
CAUTION:
danger of damage to the internal pneumatic circuit.
For installations with the pump submerged, or for operation in environments with a harsh atmosphere
(dust, vapours or saturated vapours), provision must be made for the installation of fittings and pipes
(made of suitable materials) and for venting the air to the atmosphere outside the working environment.
CAUTION:
risk of fluid leaking in case of breakage of the diaphragms.
In installations for pumping flammable (permitted by marking), corrosive, toxic or dangerous fluids, com
-
pressed air must be discharged into suitable pipes in a safe area for collection.
4.4.8
Connect the compressed air supply pipes to the two pump connections and to the upstream piloting valve (pneu-
matic oscillator, or 2/3-way valve for remote control from PLC).
CAUTION
: risk of pneumatic pressure drop.
Use pipes, accessories and control and regulation elements with flow and pressure characteristics suitable
for the characteristics of the pump in order not to cause pressure drops.
Pay attention to snap-on
fittings: most of them cause pressure drops.
4.4.9
Adjust the compressed air mains pressure so that when the pump is running the pressure is not less than
2 bar and not more than 8 bar.
For S
CUBIC and
S
BOXER
pumps with rubber balls, do not exceed the
MAX pressure of 5 bar.
CAUTION
: risk of standstill and/or diaphragm breakage.
To feed more than one pump with the same air control device, please contact the DEBEM Technicians.
Lower or higher pressures may cause malfunctions or breakage of the pump, resulting in product spillage
and damage to persons and/or property.
4.4.10
FOR INSTALLATIONS IN ZONE 1 - ZONE 21 - ZONE M2 (
only
for M2 marked pumps)
If the user foresees the possible risk of exceeding the temperature limits specified in the marking on the
pump for use in an area classified as potentially explosive, a protective device must be installed on the
system to prevent the overall temperature (fluid and environment) from being reached as indicated in
Section "2.6 TECHNICAL CHARACTERISTICS"
.