Thermostatic mixing valves ECOSAN are indispensables for saving water and energy.
Their use is provided by the law on energy savings which limits to 48°C the temperature of distribution of sanitary water. In many Countries the use of thermo-
static mixing valve is considered indispensable also for the prevention of “Legionella pneumophila”. In plants with the accumulation of hot sanitary water to avoid
the risk of developing this dangerous microorganism, the temperature of the water in the tank should not drop below 60°C-65°C. The water at this temperature
can not be used directly and so it is indispensable the installation of a thermostatic mixing valve to reduce and maintain constant the water’s temperature that
is distributed.
ECOSAN operating characteristics and safety
The constant temperature of water is obtained by the movement of a “distribution box” that regulates the permanence of the quantity of hot and cold water,
each change of temperature is corrected almost instantaneously, by a thermostatic element of wax and copper powder. To avoid the danger of burns, a
device blocks the supply of hot water if suddenly is missing the supply of cold water.
Diameter to be used
The sizing is important to get a good result of sensitivity of the thermostatic mixer and precision of the temperature. For a quick calculation we have prepared
an indicative table that considers the type of plant.
Quick calculation
n. fittings
HOUSES
BAR
2
3
4
5
1/2”
1/2”
1/2”
10
3/4”
1/2”
1/2”
15
1”
3/4”
1/2”
20
1”
3/4”
3/4”
30
1” 1/4
1”
1”
50
1” 1/4
1” 1/4
1” 1/4
100
1” 1/2
1” 1/2
1” 1/2
2
1/2”
1”
1” 1/4
1” 1/4
1” 1/2
1” 1/2
2”
TIMED TAPS MAGIC
3
1/2”
3/4”
1” 1/4
1” 1/4
1” 1/4
1” 1/2
1” 1/2
GYM - SPORTS FIELD
4
1/2”
3/4”
1”
1” 1/4
1” 1/4
1” 1/4
1” 1/2
2
3/4”
1” 1/4
1” 1/2
2”
2”
2”
—
STANDARD TAPS
BAR
BAR
3
3/4”
1” 1/4
1” 1/2
1” 1/2
1” 1/2
2”
—
4
1/2”
1”
1” 1/4
1” 1/2
1” 1/2
1” 1/2
—
These indications are approximate and consider a pressure loss of 20% and the coefficient of contemporaneity.
For a more precise calculation is necessary:
– consider the maximum quantity of water mixed to use in 1 minute, multiply the number of units for single water flow and multiply the total for the coefficient
of the contemporary.
Average flow rate in l/min
of the devices
Coefficients of
contemporaneity
– choose the diameter of the mixer to be used on the table of
flow rates
Flow rate in l/min of ECOSAN net flow rates considering a
pressure loss of 20%
– example of calculation:
gym with 20 showers, 10 washbasins – timed taps MAGIC – bar 3
30 x 7 – tot. liters 210
210 x 0.86 = 180 l/min – will be chosen ECOSAN Ø 1” 1/4
gym with 20 showers, 10 washbasins – traditional taps – bar 3
20 x 12 = 240 l/min – 10 x 10 = 100 l/min. – tot. liters 340
340 x 0.86 = 292 l/min – will be chosen ECOSAN Ø 1” 1/2
small house with 4 apartments, with two bathrooms, 4 kitchens – bar 2
8 x 25 = 200 l/min – 4 x 10 = 40 l/min. – tot. liters 240
240 x 0.33 = 79 – will be chosen ECOSAN Ø 1”
washbasin
bidet
tub
shower
sink
lavatory
MAGIC
10
6
15
12
10
25
7
no. of sanitary fixtures
1-2
3
4
5
10
15
20
25
30
35
40
50
60
80
100
dwellings
1
0.70
0.60
0.50
0.33
0.27
0.23
0.21
0.19
0.18
0.17
0.16
0.15
0.14
0.13
hotels and
institutions
1
1
1
1
0.82
0.67
0.57
0.52
0.47
0.42
0.40
0.35
0.33
0.32
0.31
gymnasia and
sports facilities
1
1
1
1
1
1
1
1
0.86
0.76
0.68
0.57
0.49
0.46
0.44
BAR
DIAMETER
1/2”
3/4”
1”
1” 1/4
1” 1/2
2”
1
28
43
53
82
155
212
2
40
63
75
118
225
300
3
50
76
92
145
270
370
4
58
90
108
167
320
430
21
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