THERMOSTAT COOLANT FOR RENAULT 18 ESPACE/I TRAFIC/Bus/Van/Platform/Chassis 2.1L VALEO 819898

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. 18 (134_)
2. 18 Saloon (134_)
3. ESPACE I (J11_)
4. ESPACE � (J11_)
5. TRAFIC Bus (T5, T6, T7)
6. TRAFIC Van (T1, T3, T4, T2)
7. TRAFIC Bus (TXW)
8. SAFRANE I (B54_)
9. SAFRANE � (B54_)
10. CHEROKEE (XJ)
11. WAGONEER (XJ)
12. CHEROKEE SUV (XJ)
13. TRAFIC Van (TXX)
14. FUEGO (136_)
15. TRAFIC Platform/Chassis (PXX)
16. TRAFIC Rodeo (PXX)
17. TRAFIC Platform/Chassis (P6)
18. TRAFIC Rodeo (P6)
19. 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.