Brochure

Applications
UP Series
23
Pumped liquids
Depending on type, Grundfos circulator pumps are
designed for the following liquids:
• Potable water
• Non-potable water
• Water/glycol mixtures
• Chilled water
• Domestic-hot water
• Softened water.
If the circulator pump is used for a glycol mixture with a
higher viscosity than that of water, the hydraulic
performance of the pump will be reduced.
Example: 50 % glycol at 68 °F (20 °C) means a
viscosity of approx. 10 cSt and a reduction of pump
performance by approx. 15 %.
When selecting a pump, the viscosity of the pumped
liquid must be taken into consideration.
Ambient and liquid temperatures
The maximum allowable water temperature is
determined by the ambient or surrounding air
temperature as shown in the table below.
Note: This table refers to all standard product without
timer/control options or other special features.
• If the UP pump is equipped with a timer, the
maximum liquid temperature is 150 °F (66 °C).
• Temperature requirements for pumps with timer/
control or other special features may be found
on their technical data page.
The ambient temperature for standard pumps with a
permissible liquid temperature from 36 °F (2 °C) to
230 °F (110 °C) should always be lower than the liquid
temperature, as otherwise condensation may form in
the stator housing.
Maximum system pressure
145 psi (10 bar).
Minimum inlet pressure
The amount of pressure required at the inlet of a pump
is a function of the temperature of the water as shown
in the table below.
Performance
Flow range 0 - 120 gpm, head range 0 - 46 feet
In a pressure system, the required inlet pressure is the
allowable system pressure.
In a system open to the atmosphere, the required inlet
pressure is the minimum distance the pump must be
located below the lowest possible water level of the
water source (tank, pool, etc.).
Maximum water temperature
Ambient (°F)
104
(40)
120
(49)
140
(60)
160
(71)
175
(79)
Water, all cast iron (°F)
230
(110)
220
(104)
210
(99)
190
(88)
175
(79)
Water, all bronze and stainl. steel
220
(104)
210
(99)
190
(88)
175
(79)
*exceptions below
UP/UPS 15 FC and UP 43 FC (°F)
200
(93)
190
(88)
180
(82)
170
(77)
UP 15BUC5 and UP 15BUC7 (°F)
200
(93)
190
(88)
180
(82)
170
(77)
UPS 15-35 (°F)
165
(74)
140
(60)
---
UP 15-100F (°F)
205
(96)
195
(91)
185
(85)
175
(79)
-
UP 26-120U (°F)
205
(96)
195
(91)
185
(85)
175
(79)
-
UP 26-116 (°F)
150
(66)
140
(60)
---
Liquid temperature
UP(S) model
140 °F
(60 °C)
165 °F
(74 °C)
190 °F
(88 °C)
230 °F
(110 °C)
[psi] [bar] [psi] [bar] [psi] [bar] [psi] [bar]
UP(S) 15
1.3 0.1
1.9 0.1 4.0 0.3 15.6 1.1UP(S) 26
UP(S) 43
UPS 26-150 1.3 0.09 2.6 0.18 7.8 0.54
UPS 43-100 2.1 0.15 5.6 0.40 11.3 0.80
UPS 50-60 0.5 0.04 1.0 0.07 1.3 0.09 7.0 0.49