Buy Maincor Electro-Thermic Head
230V and 24V Electro Electro-Thermic Heads which open and close to control the flow of water around the underfloor circuits.
In the core of the electrothermic head is an electrothermic element. The element uses a wax compound which develops when it takes on heat. This expansion drives a small piston in a linear direction. The heat is generated when current is passed via a PTC resistor attached to the component body.