Brochure

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The materials used in constructing the mixing valve eliminate potential
sticking due to scale. All functional parts are constructed using a low friction
coefficient material, which ensures performance over time.
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The temperature-sensitive element, the “engine” of the thermostatic three-
way valve has low thermal inertia. Therefore, it can quickly react to changes
in the conditions of inlet pressure and temperature, shortening the valve
response time as the thermal load changes.
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The control knob is used to adjust temperature in a full turn (360°) between
min. and max. It also has tamper protection for locking the temperature at
the set value.
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Turn the knob to the required number. Unscrew the upper screw and remove
the knob. Place the knob back on so that the internal slot mates with the key
on the valve body. Reinstall the upper screw.
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The hydraulic separator permits hydraulic separation between the primary
and secondary circuits, preventing flow in one circuit from interfering with
flow in the other. It can be removed if connecting directly to a HydroLink™ or
hydraulic separator without a primary pump.
M
I
N
M
A
X
7
1
2
3
1
2
3
4
L/MIN
1
2
3
4
L/MIN
1
2
3
4
L/MIN
WC
SOGGIORNO
CAMERA
CALEFFI
WC
SOGGIORNO
CAMERA
CALEFFI
Supply manifold
equipped with
flow meters and
balancing valves.
Return manifold
equipped with
shut-off valves.
CALEFFI
CALEFFI
End fittings with automatic
air vent with hygroscopic
cap and drain cock.
SYSTEM
FLOW
SYSTEM
RETURN
BOILER
FLOW
BOILER
RETURN
4
1
8
5
7
3
2
6
Characteristic components / hydraulic diagram
Item Description Symbol
1 Circulation pump
2 Top elbow with supply temper-
ature and pressure gage
3 Purge valve
4 Supply temperature and
pressure gage
5 Return temperature gage
6 Primary circuit shut-off valves
7 Primary circuit hydraulic
separator with check valve
8 Thermostatic three-way mixing
valve with built-in sensor
T
8
SYSTEM
FLOW
SYSTEM
RETURN
BOILER
FLOW
BOILER
RETURN
7
6
5
1
6
T
3
2, 4
SECONDARY
FLOW
SECONDARY RETURN
PRIMARY
FLOW
PRIMARY
RETURN
2
5 1
3
4
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The three-way mixing valve unit, containing the piston, is constructed of
a single casting with connections to the primary and secondary circuits.
Internal channels carry the system return fluid from the primary return port to
the mixing chamber, allowing for the unit to be small and easy to connect.
Reduced head losses
The three-way mixing valve is equipped with a specially designed shutter
with calibrated water orifices. This ensures a high flow rate and a reduced
size, while maintaining accurate temperature control with no swings due to
sudden changes in thermal load.
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The three-way mixing valve is designed so that all fluid regulating
components are contained in a removable internal cartridge. This allows
for easy inspection, cleaning or replacement if required, without he need to
disconnect any piping to the valve body.
The fluid temperature is controlled by a thermostatic three-way mixing valve
regulated by a thermostatic sensor (4) located in the mixed water outlet
chamber (3) of the valve. By expanding and contracting, it continuously
ensures a correct proportioning of hot water coming from the boiler, and
water returning from the manifold circuit. The water intake is regulated by
an internal cartidge, consisting of a piston (5) that slides inside a cylinder,
located between the hot water flow (1) and the water returning from the
circuit (2). Even if the secondary circuit thermal load or the inlet temperature
from the boiler changes, the mixing valve automatically adjusts the flow rate
until it obtains the set secondary flow temperature.
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