Valvex mixing valves

CONTROLMIX 4-way mixing valves

A solid fuel boiler is a popular heat carrier in our home. It can also be an additional heat source in the so-called integrated heating system. When deciding on such an installation, we very often use mixing valves. Their task is to regulate the supply temperature of the heating system, as well as the return temperature to the boiler. Too low a temperature of the heating medium returning to the solid fuel boiler causes water to precipitate on its walls in the combustion chamber. Over the years, this can lead to corrosion of the water jacket walls, and thus rapid wear of the device.

Schematic diagram of the Controlmix 4-way valve in an installation with a solid fuel boiler

See Controlmix valves at the Onninen wholesaler

The appropriate temperature of the water medium at the boiler return eliminates this problem, therefore the solution to it is the Valvex 4-way mixing control valve . The CONTROLMIX valve , by increasing the return temperature, protects the boiler against condensation and, as a result, against corrosion of the boiler sheet metal, thus extending its service life and increasing the efficiency of combustion of the supplied fuel.

Valvex 4-way rotary mixing valves are available in 5 basic dimensions
– from DN20 to DN50.

Particularly noteworthy are the sliding inserts (PTFE) placed between the valve body and the valve disc. This unique idea from VALVEX guarantees low valve opening/closing torque (<1 Nm) and protection against scaling.

See Controlmix valves at the Onninen wholesaler

CONTROLMIX 3-way mixing valves

3-way mixing valves are mainly used in low-temperature installations. Their purpose is to prepare the appropriate temperature of the heating medium, given to the underfloor heating. They are installed before
circulating pump. The properly mixed agent is sucked in by the pump and fed to the receiver. Temperature control is much more precise if we mount a mixing actuator to such a valve. The Valvex brand distinguishes two actuators in its offer:

• V-MIX STM 10/230 actuator – has a built-in constant temperature controller,
  sensor and plug installed. The sensor, mounted as far as possible from the mixing valve, monitors the set mixing temperature. The set mixing temperature is set directly on the actuator.
• V-MIX ST 10/230 actuator – requires the use of an external controller. Valvex's offer includes the V-THERM controller, equipped with weather control, room thermostat control and control functions.
  constant temperature. The selection of the function depends on the design of the installation. You can also use other regulators available on the market or use
  regulators installed in solid fuel or gas boilers.

Schematic diagram of the Controlmix 3-way valve in an installation with a solid fuel boiler

The rotational power of the actuators is as much as 10 Nm. This guarantees reliable and smooth opening and closing of the valve, even after a long period of non-use of the installation.
(summer period). Valvex 3-way valves are dimensions from DN20 to DN50. They are characterized by an appropriate flow coefficient for a given size. They are made of high quality materials, which guarantees long service life.

The size of the mixing valve plays an important role, because oversizing or selecting too small a size can lead to incorrect operation of the heating circuit or its complete failure (no heat, inability to maintain the desired flow temperature, incorrect operation of the actuator)
In order for the valve to fulfill its function in the installation, it is necessary to determine the flow rate, valve authority, and then the Kvs value, according to which the valve size is selected.