Bosna i Hercegovina

Thermoelectric actuator


Efficient heating of buildings has become a challenge for investors. It is no longer just about keeping people warm. There is much more than that: Adjustment of the temperature to the function of the room, low consumption of heating fuel, long service life of the system and convenient operation. All of this results in money savings, environmental protection and a better quality of life. Our everyday comfort, the costs of operating the house and the ecological future of the planet depend on the heating system installed in the building. There are a lot of tasks to be performed … Therefore, modern heating installations must work efficiently. To make it possible, they should be equipped with durable and safe elements controlling the flow of the heating medium. One of such elements is a thermoelectric actuator.

What is a thermoelectric actuator?

Thermoelectric actuator is designed to control heating installation – both underfloor and radiator. It makes it possible to open and close the flow of the heating medium (e.g. hot water) in a loop, ensuring control over the temperature in the building. It can be used both on valve inserts at the radiators and in radiator and floor manifolds. However, it should be remembered that some actuator models are suitable only for specific valve inserts (such information should be found in the instructions or product card). Thermoelectric actuators are also used to control heat in boilers and DHW controllers. In this case, external controllers should be used. Modern actuators cooperate with room thermostats (temperature thermostats) and wiring centers. To sum up, thermoelectric actuators are installed mainly to control the operation of individual heating systems.

How does a thermoelectric actuator work?

The principle of operation is not complicated. The basic function of the thermoelectric actuator is to press and release the valve stem of the heating system. Basically, it looks like this (example for NC actuators): when no control voltage is applied (so-called de-energized state), the actuator presses the valve stem – the valve is closed (the heating medium does not flow through the system, it does not heat). When the control voltage appears, the actuator releases the stem – the valve opens (the heating medium flows through the system and heats the room). This control mechanism, although simple, is crucial for efficient heating operation.

Which thermoelectric actuator to choose?

It is easy to see that the reliable operation of actuators is the key to the correct and efficient operation of the entire heating control system. When choosing thermoelectric actuators for your home (or for a client’s home), you need to pay attention to several issues.

Firstly, the actuators must be compatible with the rest of the heating system. The first thing to do is to check whether they fit the valves. An important parameter here is the so-called actuator stroke (given in mm). It decides which thermostatic inserts (with which manifolds) the actuator is compatible. The larger the stroke, the greater the certainty that the device will work with a given insert. It will be able to open the insert (valve) enough to ensure the flow, and close it so that there is no flow at 100%.

Secondly, the type of actuator in terms of voltage-free state. On the market we can buy NO actuators – normally opened (when there is no voltage, the valve is open, the voltage closes the valve) or (and there are more of them) NC actuators – normally closed. Here, in the voltage-free state, the valve is closed, and the voltage opens the valve and starts heating.

Thirdlysupported voltage. Most actuators are adapted for voltage of 230V, but before buying you should check it. Some manufacturers, including SALUS Controls, also offer models powered by 24V.

Fourth, the operating power consumption: it should not exceed 5 W. It is better if it is lower.

Fifth, opening time: remember that actuators have a delayed action. The best quality devices start in less than 3 minutes.

Sixth, the status indicator. It seems to be nothing essential, but it makes a difference. Thanks to it we know whether the valve is open or closed at the moment.

And finally, seventh, additional assembly facilities. It is worth noting whether the product you are interested in has a first open function. If so, during the first assembly the device is in the open position, which enables the flow of fluid and performing a pressure test without removing the actuator. This makes installation easier.

The perfect thermoelectric actuator for your underfloor heating system

Our actuators are one of the most valued devices on the market, controlling the heating flow in the circuits of surface (floor) installation. They are durable, safe, easy to operate. They have small dimensions, consume little power (only 2W) and the first installation is facilitated by the mentioned first open function. Their other advantages are fast opening time (about 2 minutes) and 4-mm stroke. With a stroke of 4 mm, the actuator will work well with practically every thermostatic insert available in stores. SALUS Controls underfloor heating manifold actuators also have a clearly visible element indicating the status of the device; open or close.

Discover: T30NC_230V_M30x1_5, T30NC_24V_M30x1_5, T28NC_230V_M28x1_5, T30NO_230V_M30x1_5, T30NO_24V_M30x1_5.

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