What Is Meant By Thermal Actuator How It Works?

how thermal actuator works? actuator types, actuator price

Thermal Actuator How it works? Okey, the workings of this thermal actuator are by combining sensing actuation and temperature into a device. Thermal actuators are used in many ways, such as mixing liquids, to control temperature, and to prevent freezing. Thermal actuators are the most important operating component in a device. Almost everything is important, from the thermostat to the thermal bypass valve, tempering valve, and thermostatic mixing valve.

Thermal Actuator How It Works Based On The Working Principle Of This Tool?

The thermal actuator of how it works based on the working principle of this tool is through several stages. Temperature or thermal energy will be converted into motion or kinetic energy by a thermal actuator. Typical thermostatic actuators are specifically composed of temperature sensing materials that are locked by a diaphragm and able to push the blockage which eventually the piston in the guide can move. Movement or scratches are also produced by thermal actuators because in them there is a heat-sensitive material that can contract and expand because of the temperature changes.

Thermal actuator how it works based on temperature sensing materials? temperature sensing material that causes the piston to move with the process of expanding and contracting when there is a temperature difference. This material can be in the form of gas, liquid, or a substance such as wax which is based on temperature can make changes in volume.

If you use a wax material, the substance will be arranged in such a way at a certain temperature to be able to undergo phase changes. This means that the wax will change phase from solid to liquid when the temperature rises until the melting point is exceeded, and significantly the volume can also be increased. This expansion causes the diaphragm to be driven by wax and forces the movement of the piston inside the guide. Then the wax will change in phase from solid to liquid when the temperature drops below the melting point. Given this, the diaphragm pressure will relax due to the contraction of the material volume. But the piston will return to its original position due to a spring.

The Advantages Of Thermal Actuators

The advantages of this thermal actuator are numerous compared to previous solutions which are too complicated. One example is the thermal actuator inside the thermostatic valve making it a single device capable of operating by integrating the functions of drive, temperature sensing, and fluid control. When compared with electronic sensing systems and solenoid valves in conventional settings, thermal valves are superior because they reduce some external components.

Thermal actuators do not require solenoids, thermocouples as temperature sensors, control circuits, electronic instrumentation, and batteries. Because the components are few, making the thermal valve installation cheaper and easier. The overall cost and design complexity are reduced. Dangerous events such as short-circuiting or power interruptions will not affect this device, because thermal valves do not require an electricity supply. Thus, the security is also proven to be better than the previous device which is still traditional.

Drawbacks Of Thermal Actuators

The most prominent disadvantage of thermal actuators is the pause or hysteresis between the piston traveling with the rising temperature compared to the piston traveling with the falling temperature. When the temperature starts to rise, the piston actuator along its path will be driven by a temperature sensor material whose movement is expanded. Certain temperatures and positions result in a power stroke like this. But when the temperature decreases, the contraction in the temperature sensing material will occur according to the temperature function which is slightly different from the position left behind the original function. This results in a slightly lower temperature of piston retraction at the backstroke.

Due to temperature conditions that have increased and decreased, the position of the actuator will not be the same. Or in other words, even if the temperature is almost similar, there will be a slight difference between the position of the actuator during the return stroke and the power stroke depending on whether the device is cooling or heating.

Such is the explanation of the thermal actuator how it works. What do you think about it, is it true that the performance of the thermal actuator is more efficient than the previous device? Or need further development?