Comparison Rudes RS 25/4-180 4 m vs Rudes UPS 25/4-180 4.2 m

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	Rudes RS 25/4-180 4 m	Rudes UPS 25/4-180 4.2 m
	Outdated Product	Outdated Product
all specs only differences
TOP sellers	Find prices on Amazon.uk Find prices on eBay.uk	Find prices on Amazon.uk Find prices on eBay.uk
Main function	central heating	central heating
Design	single head	single head
Pump type	centrifugal	centrifugal
Rotor type	wet	wet
Specs
Max. flow	2700 L/h	2700 L/h
Max. head	4 m	4.2 m
Max. operating pressure	10 bar	10 bar
Minimum fluid temperature	-10 °С	-10 °С
Max. fluid temperature	110 °С	110 °С
Features	3 speeds	3 speeds
Motor
Max. power consumption	70 W /50/35 Вт/	70 W /50/35 Вт/
Mains voltage	230 V	230 V
Motor type	asynchronous	asynchronous
Shaft arrangement	horizontal	horizontal
Shaft material	cermet	cermet
Connection
Connection type	thread	thread
Inlet/outlet arrangement	coaxially	coaxially
Inlet	1 1/2"	1 1/2"
Outlet	1 1/2"	1 1/2"
More specs
Pump housing material	cast iron	cast iron
Impeller material	plastic	plastic
Country of brand origin	Ukraine	Ukraine
Port-to-port length	180 mm	180 mm
Dimensions (HxWxD)	125x180x137 mm	125x180x137 mm
Weight	2.2 kg	2.2 kg
Added to E-Catalog	june 2017	june 2017

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.