BRV Bonetti Rubinetterie Valduggia S.r.l.

MODVLVS

Regolare e distribuire energia pulita

Logico

Multifunctional compact hydraulic module for the management of a direct circuit, a mixed circuit and the production of domestic hot water (DHW)

Product file

°Caleon Thermostat - Wi-Fi

Elegant chrono-thermostat with TFT capacitive touch panel. Wi-Fi N 2.4 Ghz connection for remote control by °Caleon app.

Product file

ModvFresh Basic

Compact heat exchange unit to deliver fresh domestic hot water (DHW).

Product file

DomvS Clima

Control unit for manifolds of heating and cooling radiant panels up to 200 m2. Fixed point thermostatic mixer or motorized rotary mixing valve. LCD room control unit.

Product file

1610

Full bore 2-way zone ball valve, with bidirectional actuator with quick connection. Dimensions from 1/2" DN15 to 1"1/4 DN32.

Product file

Mixing kit for ModvFresh Basic

35÷60°C thermostatic mixing kit designed for ModvFresh Basic, with anti-scald thermostatic mixing valve for small applications.

Product file

726 - Basic Series

Anti-scald thermostatic mixing valve for medium and small applications. Compact size. Available Kvs: 1.5, 1.8 and 3.4.

Product file

740 - DN25

Anti-condensing valve with thermostatic control. Connections female.
Working:

The anti-condensing thermic valve optimizes the connection of the solid fuel heating source to the heating system or to the buffer tank, by adjusting automatically the return water temperature to the heating source at the thermostat setting value.

The device keeps the heating source at high temperature (always higher than the condensing temperature) in any working condition, preventing deposits both into the boiler and into the chimney flue, so improving the efficiency and the life. Therefore also corrosion problems of the heating source or dangerous fires of the chimney flues are avoided.


Technical features:

Anti condensing thermic valve with thermostatic control of the return temperature to solid fuel heating sources.
Hot forged brass body. Yellow brass finish.
  • Maximum working pressure: 10 bar.
  • Maximum temperature: 100°C.
  • Calibration temperatures: 45°C, 55°C, 60°C (70°C and 80°C on demand).
  • Seal: watertight between the A-AB gates; 3% leak rate of Kvs between B-AB gates.
  • Easy service or replacement of the sensor to change the calibration without removing the valve from the installation.
PN 10. A-AB kvs value: 3,5. B-AB kvs value: 2,3.
Nominal opening temperature: setting temperature + 10 K.
Available external connections: 3/4" Female.

PED 2014/68/EU 4.3
FIELD OF UTILIZATION:
For a a maximum power that can be managed up to 32 kW (with ∆t 20 K) and maximum flow 1400 l/h.
Available calibration temperatures:
45 = 45 °C
55 = 55 °C
60 = 60 °C
Calibration temperatures available on demand:
70 = 70 °C
80 = 80 °C

Mounting:

The valve con be mounted on both sides of the heating source, in vertical or horizontal position:
  • On the return pipe to the boiler (setting at 45°C, 55°C or 60°C), in mixing mode;
  • On the supply pipe to the buffer tank (setting at 70°C or 80°C), in diverting mode with installation control function.
To optimize the anti-condensing control, we advise to mount the device on the return to the boiler (scheme 1).
 
  Scheme 1:
Mounting in mixing mode
with anti condensing function.
Max. Δp: 100 kPa
 
Scheme 2:
Mounting in diverting mode with installation control function.
Max. Δp: 30 kPa
 


W
ay of working:

The hydraulic schemes shown here after are related to the use of the thermic valve in mixing mode that, as previously said, allows the optimization of anti condensing control.
Attention: the following representations show, as exemple, the art. 749. They are to be considered just as an indication and they have no completeness pretension.



(1) Start of the system (heating of the boiler)

After the starting of the boiler, the thermic valve is fully closed towards the user (gate A) and this condition remains until the fluid, warmed up by the heating source, gets the opening temperature of the thermic valve (corresponding to the calibration value, f.i. 55°C). During this step the fluid sent by the boiler fully recycles through the by-pass (gate B) and the boiler temperature rises very quickly.


(2) Loading of the system (heating of the tank)

At the achievement of the opening temperature (f.i. 55°C), the way to users (gate A) proportionally starts to open meanwhile, the by-pass (gate B) is going to be closed. The boiler temperature slowly rises, giving energy to the user but, in any case, it will not decrease any more below the calibration temperature (f.i.55°C).


(3) Working system

Starting from the condition of point 2, the supply temperature progressively rises up to the full opening of the thermic valve (gate A) and up to the corresponding shutting of by-pass (gate B). This happens at about 10 K more than the calibration or opening temperature (therefore, in the example in hand at about 65°C). Now the installation is on working and the supply fluid temperature can rise up to the set value.



Dimensional specifications:



Specifications Dimensions
3/4"
A
B
C
D
CH
Weight [g]
70
79
42
10
17
437

Code 3/4”: 03740-xx

Code composition:the suffix “xx” shows the
setting temperature of the thermic valve; f.i.: 03740-55 (calibration at 55°C)