Thermostat, coolant - 856-83K MOTORAD

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. MEGANE III Grandtour (KZ0/1)
2. GRAN TOUR III Grandtour (KZ0/1)
3. MEGANE III Hatchback (BZ0/1_, B3_)
4. MODUS / GRAND MODUS (F/JP0_)
5. TWINGO II (CN0_)
6. DUSTER (HS_)
7. CUBE (Z12)
8. SCENIC III (JZ0/1_)
9. GRAND SCENIC III (JZ0/1_)
10. CLIO III Hatchback Van (SB_, SR_)
11. KANGOO BE BOP (KW0/1_)
12. THALIA II (LU_)
13. SYMBOL II (LU_)
14. NV200 / EVALIA Bus
15. EVALIA Bus
16. NV200 Bus
17. NV200 Van
18. KANGOO Express (FW0/1_)
19. KANGOO Rapid (FW0/1_)
20. QASHQAI / QASHQAI +2 I (J10, NJ10, JJ10E)
21. See more in applications

The principle of the thermostat work

The classic MOTORAD 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.