THERMOSTAT COOLANT FOR RENAULT 5/1/Hatchback/Van LE/CAR 18/Variable/Break 16 5 VALEO 819921

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. 5 (122_)
2. LE CAR (122_)
3. 18 (134_)
4. 18 Saloon (134_)
5. 18 Variable (135_)
6. 18 Break (135_)
7. FUEGO (136_)
8. TRAFIC Bus (T5, T6, T7)
9. 16 (115_)
10. TRAFIC Van (T1, T3, T4, T2)
11. 15 (130_)
12. 5 Hatchback Van (238_)
13. TRAFIC Platform/Chassis (P6)
14. TRAFIC Rodeo (P6)
15. TRAFIC Van (TXX)
16. 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.