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Comparison Grundfos UPS 50-185 F 17.5 m
DN 50
280 mm
vs Grundfos UPS 40-180 F 12.5 m

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Grundfos UPS 50-185 F 17.5 m DN 50 280 mm
Grundfos UPS 40-180 F 12.5 m
Grundfos UPS 50-185 F 17.5 m
DN 50
280 mm
Grundfos UPS 40-180 F 12.5 m
from $801.81 up to $1,026.76
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from $617.67 up to $771.56
Outdated Product
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Main functioncentral heatingcentral heating
Designsingle headsingle head
Pump typecentrifugalcentrifugal
Rotor typewetwet
Specs
Max. flow31000 L/h21000 L/h
Max. head17.5 m12.5 m
Max. operating pressure10 bar10 bar
Minimum fluid temperature-10 °С-10 °С
Max. fluid temperature120 °С120 °С
Features
3 speeds
3 speeds
Motor
Max. power consumption
1265 W /965/870 W/
770 W /570/490 W/
Mains voltage230 V230 V
Shaft arrangementhorizontalhorizontal
Shaft materialstainless steelstainless steel
Connection
Connection typeflangeflange
Inlet/outlet arrangementcoaxiallycoaxially
InletDN 50DN 40
OutletDN 50DN 40
More specs
Pump housing materialcast ironcast iron
Impeller materialstainless steelstainless steel
Country of brand originDenmarkDenmark
Noise level41 dB41 dB
Protection classIP44IP44
Insulation classHH
Port-to-port length280 mm250 mm
Weight27.9 kg22.6 kg
Added to E-Catalogoctober 2015october 2015

Max. flow

The maximum flow of a pump is the amount of liquid it can pump in a certain amount of time.

Features of choosing the optimal performance option depend primarily on the purpose of the pump (see above). For example, for DHW recirculation models, the pump performance should not exceed the performance of the water heater. If the water heater is capable of delivering 10 litres per minute to the DHW circuit, then the maximum pump performance will be 10*60=600 L/h. The basic formula for calculating the performance of a heating system takes into account the power of the heater and the temperature difference at the inlet and outlet, and for the cold water system — the number of points of water intake. More detailed information about the calculations for each application can be found in special sources, and it is better to entrust the calculations themselves to professionals.

Max. head

The head can be described as the maximum height to which a pump can lift liquid through a vertical pipe without bending or branching. This parameter is directly related to the pressure that the pump produces: 10 m of head approximately corresponds to a pressure of 1 bar (do not confuse this parameter with operating pressure — see more about it below).

The head is one of the key specs for most circulation pumps. Traditionally, it is calculated based on the difference in height between the location of the pump and the highest point of the system; however, this principle is relevant only for units that boost the pressure of cold water(see "Suitable for"). Circulation pumps for heating and DHW work with closed circuits, and the optimal pressure depends on the total hydraulic resistance of the system. Detailed calculation formulas for the first and second cases can be found in special sources.

Max. power consumption

The electrical power consumed by the pump during normal operation and maximum performance.

This indicator directly depends on performance — after all, for pumping large volumes of water, an appropriate amount of energy is needed. And the power depends on two main parameters — electricity consumption and the load on the power grid, which determines the connection rules. For example, pumps with a power of more than 5 kW cannot be connected to ordinary household sockets; more detailed rules can be found in special sources.

Inlet

The size of the inlet provided in the design of the pump. For plumbing threads (see Connection), the size is traditionally indicated in inches and fractions of an inch (for example, 1" or 3/4"), for flanges, the nominal diameter (DN) of the bore in millimetres is used — for example, DN65.

This parameter must match the dimensions of the mount on the pipe to which the pump is planned to be connected — otherwise, you will have to use adapters, which is not very convenient, and sometimes not recommended at all.

Outlet

The size of the outlet provided in the design of the pump. The value of this parameter is completely similar to the size of the inlet (see above).

Port-to-port length

The installation length is the distance between the inlet and outlet of the pump, in other words, the length of the segment occupied by the pump in the circuit. This parameter allows you to estimate the amount of space required for the unit, and determine the length of the pipe section that needs to be cut.