Pumped Liquids; Diameter Of Pump/Motor - EBARA BHE Serie Manual De Empleo E Instalación

Pump identification code
BHE L 77
. . . .
Maximum performance flow rate in m³/h
2.2 APPLICATIONS
These submersible pumps are designed for a wide
range of applications, such as the supply of water
to private homes, water systems and industries.
These pumps are necessary in case of lowering of
the groundwater level, as well as for pressure
increase.
Submerge the pump completely under the water
level both if it is installed horizontally and vertically.
See paragraph 3.1 Positioning Limits.

2.3 PUMPED LIQUIDS

Pumped liquids must be clean, compatible with
pump components and materials, without solid
particles or fibres.
The maximum sand content in the water must not
exceed 50 g/m³. A greater sand content in the
water reduces the service life of the pump and
increases the risk of blocking.
When pumping liquids with a density higher than
that of water, motors with correspondingly higher
outputs must be used.
3. INSTALLATION / PREPARATION
3.1 POSITIONING LIMITS
If the pump has to be installed in a posi-
tion where it is accessible to people, any
possibility of contact with the coupling
must be avoided. The pump might for
instance be equipped with a protective
shield.
The pump is suitable for both vertical and horizon-
tal installation, however, the pump should never
be installed inclined downwards - see fig. 2.
Note: During operation, the suction support must
always be completely submerged.
In special conditions, it may be necessary to sub-
merge the pump even deeper, depending on the
operation conditions of the pump, as well as on
temperature and NPSH values.
12
7
-
Number of impellers
Symbol for version in Aisi316
Nominal size of the motor
Minimum size of the well
BHE L
. . . .
Series

3.2 DIAMETER OF PUMP/MOTOR

The maximum diameter of the pump and of the
pump with the motor is shown in the following table
(the external diameter of the motor used for the
calculation is quoted in the third column):
Pump 6"
Pump 6"
with motor 4"
Pump 6"
with motor 6"
Pump 8"
Pump 8"
with motor 6"
Pump 8"
with motor 8"
Verify the borehole with an inside calliper to
ensure unobstructed passage.
3.3 CHECK VALVE ON THE DELIVERY PIPING
The pump is equipped with an embedded check
valve in the delivery opening. However, it is recom-
mended, especially if the pump directly feeds a
distribution network subject to pressure, to install
another check valve on the delivery piping at no
more than 10 meters from the minimum well level.
(If this latter is not known, use the delivery opening
77 7
-
Anzahl von Laufrädern
Fördermenge Höchstleistung in m³/h
Symbol für Version aus Aisi316
Nenngroße des Motors
Mindestgroße des Schachtes
Fig. 2
Diameter Diameter
with 1 with 2
cable cover cable cover
141 145
141 /
144 146.5
186.5 192
185.5 192
195 197.5
B
. . . .
Serie
External
Motor
Diameter
/
95.25
136.5
/
136.5
187.5