BRV Bonetti Rubinetterie Valduggia S.r.l.


Regolare e distribuire energia pulita

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.

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

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°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.

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Mixing kit for ModvFresh Basic

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

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ModvFresh Basic

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

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

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726 - Basic Series

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

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Solar Kit 1

Solar-boiler thermostatic connection kit
The kit, fully assembled and tested, consists of:

  • Thermostatic diverting valve 1” Male with fixed setting temperature at 48°C. Body made in DZR brass.
  • Solar check valve and filter built in the connection pipe to the solar storage tank.
  • T-shaped swivel connection to the boiler with storage tank.
  • Anti-scald thermostatic mixing valve 1” Male. Body made in DZR brass. Control of the user temperature adjustable by means of a knob from 30°C up to 65°C.
  • Solar check valve and filter built in the connection pipe to the cold water.
Centre Distance 136 mm. EPP insulation box (Measurements: 234x128x100 mm).
T-shaped central connection with adjustable angular position of the connections.
In some positions I’ll be necessary to remove the insulation box.

Maximum static pressure 10 bar (PN 10); dynamic 5 bar.
Maximum ratio between the pressures 2:1.
Inlet maximum temperature: constant temperature 100°C;
(short time temperature: 120°C for 20 s).
Temperature adjustment field: 30÷65°C. Accuracy ± 2°C.

External connections:  3/4” Male (swivel connection).

Conforme al
D.M. 174/2004

PED 2014/68/EU 4.3
Avalilable Kvs:
1.2 = Small water consumption; max. 35 l/min (3 bar)
1.7 = Middle water consumption; max. 49 l/min (3 bar)
Scheme of a thermal solar system, gravity or forced circulation

NB: This schema is just as an indication
Forced circulation solar collector
ModvSol solar station
Solar water tank
Gravity solar collector with storage tank

Wall boiler, or standing boiler with built-in storage tank
Solar Kit 1
Control thermometer


The solar kit for boiler allows to manage automatically and to exploit at its best the thermal energy delivered by a thermal solar system during any time of the year and to supply hot domestic water for end user, at a controlled temperature.

The kit, supplied in a suitable and smart EPP insulating box, works in two ways:
  • In case temperature of water coming from solar storage tank, either a gravity or a forced loop with glycol, is high enough, for example in summer, the first device of the kit, a diverting valve, diverts fluids towards the mixing valve (see scheme 1). Then the mixing valve mixes the fluid with cold water from mains, up to presetted temperature.
  • Whereas, as it happens in winter, temperature of water in solar water tank is low (less than 48°C; note: diverting valve is pre-setted on shop to divert from 48°C), diverting valve proportionally diverts pre-heated fluid towards the boiler storage tank. In this case the solar energy is full exploited and time-work for boiler to increase temperature is reduced to minimal, (see scheme 2). The anti-scald mixing valve checks and regulates the temperature of the water to the end user.
The anti-scald function automatically stops the hot water flow in case of failure in the cold water line.

Scheme 1: working conditions with water
temperature in solar storage tank higher than 48°C
Scheme 2: working conditions with water
temperature in solar storage tank lower than 48°C
Diverting valve with fixed pre-setting; exit towards outlet 1 with temperature < 48°C; towards outlet 2 with temperature > 48°C.

  Solar check valve
it is built-in in the 3/4” male fitting
Anti scald thermostatic mixing valve, adjustable from 30°C to 65°C;
H inlet hot water from the brass fitting;
C inlet cold water from mains;
MIX exit mixed hot water towards end user.
it is built-in in the 3/4” male fitting

DANGER OF SCALDS: djustment temperatures of the thermostatic mixing valve more than 55°C can cause
scalds in short time, particularly to the kids. In this case we recommend to install the security anti-scald
device Art. 790 before the outlets considered dangerous (showers etc.).

Most popular solar hydraulic schemes
Natural circulation (gravity)
Forced circulation (glycol / closed circuit)
Forced circulation (glycol / closed circuit) and boiler integration
Code 3/4” Kvs 1,2: 103685-1.2
3/4” Kvs 1,7: 103685-1.7