Installation - FLYGT PX SERIE Instrucciones De Instalacion Y Uso

5. Installation

DANGER
Positioning
WARNING
DANGER
RISK OF
ELECTRIC SHOCK
Anchoring
The pump must be firmly secured by means of appropriate bolts to a concrete base or equivalent metal
structure (bracket or platform).
If you are installing a large pump near a residential area, you are advised to insulate it from the reinforced
concrete structure by means of vibration-damping supports or sections of anti-vibration piping on the
pump's suction and delivery ports.
The dimensions of the pump base and anchoring holes are shown in fig. 1.
DIMENSIONS
PUMP
TYPE
L1 L2
PX2 100 180
PX4 100 180
PX8 130 215
PX16 130 215
Suction and delivery pipes
Use pipes suitable for the maximum pump working pressure.
The suction pipe must be perfectly sealed and of suitable size for the suction conditions.
When the liquid level is lower than the pump, a foot valve must be fitted at the end of the suction pipe
(see diagrams 2A and 2B for correct hydraulic connection).
WARNING
Correct installation
A = Eccentric reductions
B = Positive gradient
C =Good immersion
D =Large bends
E =Suction pipe diameter
F =Difference in lift level referred to pump
G =The pipes should not weigh on the
(*) The difference in lift level must be deter-
mined according to liquid temperature,
NPSH and load loss.
For pump lifting and moving sling it safely.
Do not use the eyebolts on the motor, as they are not designed to bear the
weight of the unit.
If you purchase only the pump and then couple it to a motor different from the
ones indicated in our catalogue, the safe operation of the unit will have to be
guaranteed by the person that performs the coupling.
– The pump should not be exposed to the weather or freezing temperatures.
– Make sure that there are no obstacles preventing normal flow of the cooling
air moved by the motor fan.
– The pump must be connected to an efficient grounding system in compli-
ance with local electrical regulations
– Ensure that the pump is disconnected from the mains before carrying out
any installation or maintenance operations.
L3 L4 Ø A
150 210 13
150 210 13
190 245 13
190 245 13
For in-line open circuit pumps with delivery pipe discharging below the pumps, a
min. elevation of 200 mm and an air valve must be provided to prevent the pump
from disengaging after each stop (fig. 3, page 110).
The pipes must be secured independently of the pump to avoid stressing the
flanges.
FIG.2A
>
meter
and installation (*). In optimum condi-
tions the difference in level should not
exceed 5 – 6 m.
pump but on independent supports.
Incorrect installation
1 = Sharp bend: high head loss
2 = Insufficient immersion: sucks air
3 = Negative gradient: air pockets
4 = Pipe diameter
meter: high head loss
pump port dia-
FIG.1
<
pump port dia-
en
No. 4 HOLES
FIG.2B
19