Pu
mped liquids
TPE E-circulators
6
10
6. Pumped liquids
Pumped liquids
TP, TPE pumps are suitable for pumping thin, clean,
non-aggressive and non-explosive liquids, not
containing solid particles or fibers that may
mechanically or chemically attack the pump; please
see "List of pumped liquids" below.
Examples of liquids:
• Central heating system water (we recommend that
the water meets the requirements of accepted stan-
dards on water quality in heating systems).
• cooling liquids.
• domestic hot water.
• industrial liquids.
• softened water.
If glycol or another antifreeze agent is added to the
pumped liquid, the pump must have a shaft seal of the
type RUUE.
The pumping of liquids with densities or kinematic
viscosities higher than those of water can cause
• a considerable pressure drop
• a drop in the hydraulic performance
• a rise in the power consumption.
In these situations, equip the pump with an oversize
motor. If in doubt, contact Grundfos.
If the water contains mineral oils or chemicals, or if
other liquids than water are pumped, choose the
O-rings accordingly.
Liquid temperature
Liquid temperature:
–13 °F (–25 °C) to +284 °F (+140 °C).
Please note that shaft seals operating close to their
maximum temperature will require regular
maintenance, i.e. replacement.
List of pumped liquids
Grundfos TP pumps are designed for circulation
systems with constant flow; TPE pumps are for sys-
tems with variable flow.
Thanks to their design, these pumps can be used in a
wider liquid temperature range than pumps of the
canned rotor type.
A number of typical liquids are listed page 11.
Other pump versions may be used, but we consider
the ones stated in the list to be the best choices.
The list is intended as a general guide only, and it
cannot replace actual testing of the pumped liquids
and pump materials under specific working conditions.
If in doubt, contact Grundfos.
However, use the list with some caution as these or
other factors may affect the chemical resistance of a
specific pump version:
• concentration of the pumped liquid
• liquid temperature or
• pressure.
Legend for notes in the list
Pump type
Shaft seal
Temperature
TP, TPE
BUBE
32°F to
+
284 °F
(0 °C to 140 °C)
AUUE
32°F to
+
194 °F
(0 °C to 90 °C)
RUUE
–13 °F to
+
194 °F
(–25 °C to 90 °C)
A
May contain additives or impurities that may cause shaft
seal problems.
B
The density and/or viscosity differ from those of water.
Consider this when calculating motor and pump perfor-
mance.
C
The liquid must be oxygen-free (anaerobic).
D
Risk of christallization/precipitation in shaft seal.
E
Insoluble in water.
F
The shaft seal rubber parts must be replaced with
FKM rubber.
G
Bronze housing/impeller required.
H
Risk of formation of ice on the standby pump.
E-circulator.book Page 10 Friday, October 7, 2011 4:01 PM
