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Valve for return layering with actuator DN 25 Technical description
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138119084-V01.07.2020
3.1.2 Dimensions of the valve for return
layering
Illust. 3: Dimensions
of the valve for return layering
3.2 Functional description
The return temperature from the fresh water station
to the storage cylinder can vary considerably de-
pending on the operating status. When drawing off
hot potable water, very low return temperatures may
be reached. Whereas considerably higher return tem-
peratures can be expected during circulation opera-
tion without hot potable water consumption.
The temperature of the water in the upper section
of the storage cylinder section is higher than in the
lower section. This temperature layering is necessary
for efficient operation of the storage cylinder.
The aim of return temperature layering is to disturb
the temperature layering in the storage cylinder as lit-
tle as possible. The returning water should ideally be
layered in the section of the storage cylinder where
the stored water has the same temperature.
The valve for return temperature layering with ac-
tuator DN 25 ensures the temperature-controlled
layering of the returning water in the lower or central
storage cylinder section. Temperature sensors in the
storage cylinder and in the fresh water station pro-
vide the controller of the fresh water station with the
necessary data for calculating the appropriate valve
position.
The controller of the fresh water station takes over
the control of the actuator according to the required
layering position.