18
T
T
H
HE
ER
RM
MO
OS
ST
TA
AT
TIIC
C
M
M
I
IX
XIIN
NG
G
V
V
A
AL
LV
VE
ES
S
FLANGED MIXING VALVE
CHECK
VALVE
FILTER
STOP VALVE
The precision, sensitivity, flow rate and durability of the
mixing valve can be ensured only insofar as it is looked after,
and before all else, correctly chosen.
To define the size of the most suitable mixing valve for a
determined use, the following elements must be known: The
total instant flow rate and dynamic pressure available at the
outflow for the hot water, and for the cold water, the mixing
valve's supply pipes.
It can be measured or calculated, if necessary by using the
DARIES abacus or the WATTS calculation programme
(available on the site WWW.WATTSINDUSTRIES.COM)
designed to check the manually done calculation to choose
the right mixing valve (depending on the pressures and pipe
diameters, the desired flow rate and number of drawing
points).
This tool can also be used to make sure the water speed is
not excessive. Never admit a static pressure of more than 10
bars.
The right sized mixing valve, according to the choice of
flow rate (depending on the criteria mentioned in our
technical documents).
The hot water temperature must be no higher than 85°C to
avoid premature aging of the appliance and the installation,
but should be higher than the setpoint with a difference of
5°C min. between the two liquids.
The water meter, whose given maximum flow conditions
the possible flow rate of the installation.
The length and diameter of the pipes which, through the
losses of load and water speed will facilitate or complicate
the operation of the installation.
For this purpose, the diameter of the supply tubes and that
of the mixed water supply must be of the same nominal
diameter as the mixing valve. An offset of one diameter (in
more or less) is only tolerated.
Scald protection : To prevent scalding, the hot water is
instantly cut if the cold water supply is interrupted
(
T hot water/mixed water > 10°C).
Points requiring special attention for all Thermostatic Mixing Valves :
RIGHT OR LEFT CONNECTIONS?
All our mixing valves for public installations (T9107, T9715, ULTRAMIX and flange models) are designed for being supplied with
HOT water at the LEFT and the COLD water supply at the RIGHT.
On special request, when this arrangement is impossible, some mixing valves can be fitted the other way round with a special
cartridge of "IN" (inverse) type.
Group installation high flow, or industrial application, flow up to 1200 l/min :
- High flow flanged mixing valves T70
DN65, DN80, DN100
type
DN
flow rate (L/min)
n° of points*
standard graduation 10°/50°
code ref.
weight
G
2"1/2, 65 mm
10 to 360
1 to 36
flanged mixing valve
T70065
36 kg
H
3", 80 mm
12 to 700
1 to 70
flanged mixing valve
T70080
49 kg
J
4", 100 mm
14 to 1200
2 to 120
flanged mixing valve
T70100
69 kg
* For information only. Take the coefficient of combined flow into consideration.
A range of thermostatic mixing valves specifically designed for high flow installations
where hot temperature control is provided to multiple outlets (up to 1200 l/min).
Suited for Sanitary or Industrial applications.
Standard graduation 10 to 50°C.
By request : temperature range 30 to 70°C.