Grundfos S Series User Manual

10. Technical data
10.1 Operating conditions
pH value
All pumps can be used for pumping liquids with a pH
value between 4 and 10.
Liquid temperature
The allowed temperature is 0-40 °C.
In special situations, if the motor is not fully
loaded, the temperature of the pumped liq-
uid 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.
Ambient temperature
The allowed ambient temperature is -5 °C to +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.
Density and viscosity of the pumped liquid
Density: 1000 kg/m
3
.
Kinematic viscosity: 1 mm
2
/s (1 cSt).
When pumping liquids with a density
and/or a kinematic viscosity higher than
the values stated above, use motors with
higher outputs.
Flow velocity
Keep a minimum flow velocity to avoid
sedimentations in the piping system.
Recommended velocities:
Vertical pipes:
0.7 m/s
Horizontal pipes: 1.0 m/s
Installation depth
The maximum submersion depth is 20 m.
Level of the pumped liquid
An Ex motor without a cooling jacket, in-
stallation types S and ST, must be com-
pletely submerged during operation.
Install an additional level switch to ensure
the pump is stopped if the stop level switch
is not operating.
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 the figure below.
Installation type S pumps must always be
completely submerged in the pumped liq-
uid to be Ex protected.
• Installation type C: Submerge the pump to the
top of the pump housing, so the liquid level is
always above the pump housing.
1
2
3
TM079253
Liquid level
Pos. Description
1 Installation type S (Ex pumps)
2 Installation type S (standard pumps)
3 Installation type C (standard and Ex pumps)
40
English (GB)

Grundfos S Series Specifications

General

Brand	Grundfos
Model	S Series
Category	Water Pump
Language	English