Wax thermostats
2021 / 06 / 09
Summing up what we've discovered already, you can see that all mechanical thermostats (all non-electronic ones) use substances that change size or shape with increasing temperature. So bitmetallic thermostats rely on the expansion of metals as they get hotter, while gas bellows work using the expansion of gases. Some thermostats go further and use the change in state of a substance from liquid to gas. Wax thermostats are probably the most common example—and you'll find them in home radiator valves, car engines and mixer showers. They use a little plug of wax inside a sealed chamber. As the temperature changes, the wax melts (changes state from solid to liquid), expands greatly, and pushes a rod out of the chamber that switches something on or off (operating the engine cooling system in a car or regulating the mixture of hot and cold water in a shower to ensure your body doesn't get boiled like a lobster). Wax thermostats tend to be more reliable and longer lasting in the extreme conditions inside a vehicle engine.
online service
8675528906113
info@saswell.com
info@saswell.com
English 
français
Deutsch
русский
español
العربية
简体中文