Considerations Regarding Delivery And Suction Lines; Line Accessories - Piusi E300 Instalación Uso Y Mantenimiento

ENGLISH (Translated from Italian)
L3

CONSIDERATIONS REGARDING DELIVERY AND SUCTION LINES

DELIVERY The choice of pump model to use should be made keeping in mind the viscosity of the
oil to be pumped and the characteristics of the system attached to the delivery of the
pump. The combination of the oil viscosity and the characteristics of the system could,
in fact,create back pressure greater than the anticipated maximums (equal to Pmax),
so as to cause the (partial) opening of the pump by-pass with a consequent noticeable
reduction of the flow rate supplied.
In such a case, in order to permit the correct functioning of the pump equal to the vis-
cosity of the oil being pumped, it will be necessary to reduce resistance in the system
by employing shorter hoses and/or of larger diameter. On the other hand, if the system
cannot be modified it will be necessary to select a pump model with a higher Pmax.
SUCTION
High suction pressure values lead to cavitation phenomena with high operation noise
that over time can cause pump damage, as well as lower pump performance.
In any case, for as much as was said above, it is important to guarantee low suction
pressures (short hoses and possibly of larger diameter than the suction inlet of the
pump, fewer bends, wide section filters and kept clean).
ATTENTION
L4

LINE ACCESSORIES

ATTENTION
This manual is the property of PIUSI S.p.A. Any reproduction, even partial, is forbidden.
It is a good system practice to immediately install vacuum and air pressure
gauges at the inlets and outlets of the pump which allow verification that
operating conditions are within anticipated limits. To avoid emptying the
suction hose when the pump is turned off, the installation of a foot valve is
recommended.
It is the installer's responsibility to provide the line accessories necessary
for the safe and proper functioning of the pump.The use of accessories un-
suitable for use with diesel fuel can damage the pump, injurepersons and
cause pollution.
Pumps are supplied without electrical safety devices such as fuses, motor
protectors, and systems to prevent accidental restarting after periods of
power failure or any other kind. It is the installer's responsibility to carry
out the electrical connection with respect to the applicable regulations
IT IS THE INSTALLER'S RESPONSIBILITY TO CARRY OUT THE ELECTRI-
CAL CONNECTIONS IN COMPLIANCE WITH THE RELEVANT STAND-
ARDS.
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