4.4.7
4.4.5
4.4.8
4.4.6
of
INDUSTRIAL PUMPS
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rev
For pump installations with high delivery heads and/or with strong back-pressures, the pneumatic circuit dis-
charges may freeze.
CAUTION: danger of loss of efciency and/or pump stop.
With strong heads and/or high viscosity, provide for the installation of a glycol doser on the air supply line,
upstream of the pump.
The air of the pump’s pneumatic circuit must always be discharged in a free, non-dusty atmosphere and free of
saturated vapours that can damage the internal circuit. In the event of total rupture of the diaphragms, the
uid can enter the pneumatic circuit, damage it and exit from the drain.
CAUTION: danger of damage to the internal pneumatic circuit.
For installations with the pump immersed or for operation in environments with a heavy atmosphere
(dusts, vapours or saturated vapours), it is necessary to install a pipe and ttings (of suitable materials)
to bring the air discharge point outside the environment/process liquid.
CAUTION: risk of uid leaking in case of breakage of the diaphragms.
In installations for pumping ammable (allowed by the marking), corrosive, toxic or dangerous uids, the
air discharge must be conveyed in suitable piping to a safe collection area.
Connect the compressed air supply pipe to the pump circuit.
CAUTION: risk of pneumatic pressure drop.
Use pipes, accessories and control and regulation elements with ow and pressure characteristics suitable
for the characteristics of the pump in order not to cause pressure drops. Pay attention to snap-on
ttings: most of them cause pressure drops.
Adjust the network pressure of the compressed air to guarantee a pressure of not less than 2 bars and not more
than 8 bars when the pump is running. For BOXER pumps equipped with rubber balls, do not exceed
5 bars.
CAUTION: risk of stalling 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 functional problems or pump breakage, product spills and dam-
ages to persons and/or objects.
FOR INSTALLATIONS IN ZONE 1 - ZONE 21 - ZONE M2 (only for M2 marked pumps)
Should the user think that there is a risk of exceeding the temperature limits set forth in the marking afxed
to the pump for use in a potentially explosive classied ZONE, a protective device must be installed on
the system to prevent the global temperature (uid + ambient) from being reached as indicated in Section
“2.7 TECHNICAL FEATURES”.
MIN 2 bar
MAX 8 bar
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