Thermostat is a device for maintaining a static (constant) temperature, as its name implies. There are thermostats of different designs in many devices and mechanisms, from water heaters to refrigerators. There is also a thermostat in a car's internal combustion engine (liquid-cooled, of course). In a car, the thermostat regulates the temperature of the coolant (antifreeze): it accelerates the warm-up of a cold engine and provides heat removal from the hot one. Therefore, the engine works more efficiently and more comfortably for the driver, especially in winter - without a thermostat, the stove would usually blew cold air.

1. GALLOPER (JK-01)
2. H-1 Van (A1)
3. H200 Van (A1)
4. STAREX Van (A1)
5. STAREX I Van (A1)
6. LIBERO Van (A1)
7. GALLOPER II (JK-01)
8. H-1 / STAREX Bus (A1)
9. H200 Bus (A1)
10. SATELLITE Bus (A1)
11. STAREX I Bus (A1)
12. STAREX Bus (A1)
13. TERRACAN (HP)
14. GALLOPER I
15. PREGIO Van (TB)
16. BESTA Van (TB)
17. K2500 (SD)
18. K2500 Platform/Chassis (SD)
19. FRONTIER (SD)
20. BONGO III (SD)
21. See more in applications

The principle of the thermostat work

The classic VALEO brand Thermostat, coolant is a movable valve that moves due to a change in the external environment - heating or cooling of antifreeze. The thermostat is made of a thermoelement filled with a substance resembling wax in structure - ceresin, with the addition of copper powder, graphite or aluminum for better thermal conductivity. At a certain temperature of the antifreeze, ceresin expands, opening the thermostat valve. When the motor cools down, ceresin contracts and the thermostat closes again.