Thermostat, coolant - V25-99-1751 VEMO

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. FOCUS III
2. FOCUS III Turnier
3. FOCUS III Saloon
4. ECOSPORT
5. ECOSPORT SUV
6. TOURNEO CONNECT / GRAND TOURNEO CONNECT V408 MPV
7. TRANSIT CONNECT V408 Box Body/MPV
8. B-MAX (JK)
9. C-MAX II (DXA/CB7, DXA/CEU)
10. GRAND C-MAX (DXA/CB7, DXA/CEU)
11. FIESTA VI (CB1, CCN)
12. TRANSIT COURIER B460 MPV
13. TRANSIT COURIER B460 Box Body/MPV
14. TOURNEO COURIER B460 MPV
15. GRAND C-MAX Van
16. C-MAX II Van
17. B-MAX Van (JK)
18. FIESTA VI Van
19. MONDEO V Hatchback (CE)
20. FUSION V Hatchback (CE)
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The principle of the thermostat work

The classic VEMO 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.