Grundfos S 50 Series, Инструкция по установке и эксплуатации

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English (GB)
33
10. Technical data
10.1 Operating conditions
10.1.1 pH value
All pumps can be used for pumping liquids with a pH value
between 4 and 10.
10.1.2 Liquid temperature
The allowed temperature is 0-40 °C.
10.1.3 Ambient temperature
The allowed ambient temperature is -5 °C to +40 °C.
10.1.4 Density and viscosity of the pumped liquid
Density: 1000 kg/m
3
.
Kinematic viscosity: 1 mm
2
/s (1 cSt).
10.1.5 Flow velocity
Keep a minimum flow velocity to avoid sedimentations in the
piping system.
Recommended velocities:
10.1.6 Installation depth
The maximum submersion depth is 20 m.
10.1.7 Level of pumped liquid
To avoid air being sucked into the pump and to ensure adequate
cooling of the motor during operation, make sure to meet the
following minimum requirements:
•
Installation type S :
Submerge the Ex pump to the top of the motor and the
standard pump to the middle of the motor. See fig.
36 .
• Installation type C:
Submerge the pump to the top of the pump housing or so that
the liquid level is always above the pump housing.
Fig. 36 Liquid level
In special situations, if the motor
is not fully loaded, the
temperature of the pumped liquid
may be higher.
In this case, contact the nearest
Grundfos company or service
workshop.
Explosion-proof pumps must
never pump liquids with a
temperature higher than 40 °C.
In special situations, if the motor
is not fully loaded, the ambient
temperature may be higher than
40 °C.
In this case, contact the nearest
Grundfos company or service
workshop.
For explosion-proof pumps, the
ambient temperature on the
installation site must be in the
range between -5 and +40 °C.
When pumping liquids with a
density and/or a kinematic
viscosity higher than the values
stated above, use motors with
correspondingly higher outputs.
Vertical pipes: 0.7 m/s
Horizontal
pipes:
1.0 m/s
An Ex motor without cooling
jacket, installation types S and
ST, must be fully submerged
during operation.
Install an additional level switch
to ensure that the pump is
stopped in case the stop level
switch is not operating.
Installation type S pumps must
always be fully submerged in the
pumped liquid to be Ex protected.
T
M
02
40
00
03
09
Installation type
S
Installation type
C
Installation type
S