Page 260 - water-controls-for-public-and-commercial-places

/ Sanitary technical data

GENERAL RULES FOR SANITARY INSTALLATIONS

Sanitary installations must comply with local and national water Every country has its own rules based on the same principals.
supply regulations (Water Supply Regulations, Scottish Bylaws, Please refer to local and national regulations.
NF P 41 205).
These are, however, often incomplete for installations fitted with time
flow controls. They require a particular assessment.

Pipework diameters are often chosen depending on the flow rate they
provide to the different points-of-use, their development,
the distribution height and the minimum static pressure available.

CALCULATION CRITERIA FOR WATER SUPPLY PIPES

Total pressure Simultaneous coefficient
Static pressure at the water meter. (Y) coefficient to apply to gross flow rate, relative to the number
of installed valves (x) to simulate the number of valves operating
Static pressure simultaneously.
Pressure with no flow at a single point in the installation. This coefficient will vary according to the type of product, run time
and frequency of use of the sanitary facilities.
Dynamic pressure For example: the probability of having multiple showers operating
Pressure under flow at a single point in the installation. at the same time is a lot higher than it is for WC flushes: a DELABIE
Maximum pressure for time flow valves to operate: 10 bar. shower runs for approximately 30 seconds at a time (over the length
Recommended pressure range: 1 to 5 bar. of the shower) while WC direct flush system (without cistern) only
Recommended pressure on each floor: 3 bar. lasts a few seconds.

• Point-of-use: urinal, shower or basin.
Use the following formula:
(x) = number of time flow or electronic valves
per installation branch. 0,8
Y =
(x-1)
Base flow rate (Q mini L/sec.)
Minimum flow rate per fitting, serving as model for calculation. • Direct flush valve (WC system without cistern)
The base flow rates of time flow and electronic valves Flush valves, which only operate for a few seconds, aren't
are mentioned in the catalogue and table 2 (see page 260). counted the same way as other fittings in the calculation.
Base flow rates are always presented in relation to dynamic pressure. These flush valve equivalents are as follows:
- for 3 installed valves: 1 valve operating,
Gross flow rate (Q)
- for 4 to 12 installed valves: 2 valves operating,
Sum of base flow rate of the different valves on the same branch.
- for 13 to 24 installed valves: 3 valves operating,
Design flow rate - for 25 to 50 installed valves: 4 valves operating,
Gross flow rate (Q) x simultaneous coefficient (Y). - for more than 50 installed valves : 5 valves operating.

Please note minimum dynamic pressure required for the correct functioning of fittings is as follows:

Product family Ranges Required dynamic pressure

TEMPOSTOP, TEMPOGENOU, MIX MONOFOOT, TEMPOMATIC, BINOPTIC 0.5 bar min.
Basins
TEMPOSOFT, TEMPOMIX 1 bar min.
TEMPOSTOP, TEMPOMATIC, mechanical 0.5 bar min.
Showers
SPORTING 2, TEMPOSOFT, TEMPOMIX, OUTDOOR 1 bar min.
TEMPOSTOP, TEMPOMATIC 0.5 bar min.
Urinals
TEMPOSOFT, TEMPOFLUX 1 bar min.
WCs TEMPOFLUX, TEMPOCHASSE, TEMPOMATIC 1 bar min.

258 Sanitary technical data