Flow path data sheet (drinking water)

Based on the Bernoulli equation, the flow path data sheet in the drinking water section provides brief information on the pressure components in the flow path and, if applicable, on comfort and hygiene criteria at the associated tapping point.

The flow path data sheet differs from the medium of the current flow path:

The Bernoulli equation applies to all flow paths.

The flow path data sheet is made up of various components.

Table 1. Components in the flow path data sheet for several media:

Component in the flow path data sheet	Explanation of the components	Physical unit
	The input field shows the number of the selected flow path. The flow path number can be entered manually or set using the arrow keys. Tip: You can set the zoom behaviour in the drawing using the drop-down menu in the Building Services window under View. Alternatively, you can select the desired flow path in the drawing and display its details.	-
	The medium abbreviation of the selected flow path is displayed next to the flow path number. The background colour reflects the layer colour in the drawing.	-
Designation	Displays the article designation of the component in the flow path.
pmin,V	Indicates the minimum supply pressure or the minimum pressure downstream of the pressure booster or pressure reducer.	hPa
ΔpHAL	Indicates the pressure loss in the house connection pipe.	hPa
ΔpWZ	Indicates the pressure loss in the domestic water meter.	hPa
pmin,WZ	Indicates the minimum pressure downstream of the Water meter (see minimum supply pressure). This value results from: pmin,WZ=pmin,V-ΔpHAL- ΔpWZ	hPa
Δpgeo	Specifies the pressure loss due to geodetic height difference.	hPa
ΣΔpApp	Specifies the Apparatus pressure loss. Click on the button ... button takes you to detailed information on the devices in the flow path.	hPa
pmin,Fl	Indicates the minimum flow pressure at the tapping fitting.	hPa
ΔpV	Specifies the available pressure loss. This value results from: ΔpV=pmin,WZ-Δpgeo -ΣΔpApp-pmin,Fl	hPa
lges	Specifies the total length of the flow path.	m
Rm	Indicates the mean available pressure drop. This value results from: Rm=ΔpV/lges	hPa/m
Σ(l*R)	Indicates the pressure loss due to pipe friction.	hPa
ΣZ	Specifies the sum of the pressure losses from the individual resistances.	hPa
ΔpSt-Te	Specifies the pressure loss through flow splitter.	hPa
ΔpRück	Specifies the pressure loss through non-return valves and KFR valves.	hPa
ΣΔp	Specifies the pressure loss in the flow path. This value results from: ΣΔp=Σ(l*R)+ΣZ+ ΔpSt-Te+ΔpRück	hPa
pFl	Specifies the flow pressure at the tapping point .	hPa

Further information can be found on our YouTube channel.

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