THERMOSTAT COOLANT FOR RENAULT TRAFIC/Bus/Platform/Chassis/Rodeo/Van MASTER/II VALEO 819903

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. ALFETTA (116_)
2. ALFETTA Saloon (116_)
3. ALFETTA GT (116_)
4. TRAFIC Bus (TXW)
5. TRAFIC Platform/Chassis (P6)
6. TRAFIC Rodeo (P6)
7. TRAFIC Van (TXX)
8. MASTER II Van (FD)
9. MASTER II Platform/Chassis (ED/HD/UD)
10. MASTER II Bus (JD)
11. MASTER I Van (T__)
12. MASTER I Bus (T__)
13. TRAFIC Platform/Chassis (PXX)
14. TRAFIC Rodeo (PXX)
15. MASTER I Platform/Chassis (P__)
16. DAILY II Platform/Chassis
17. DAILY II Van
18. DAILY I Platform/Chassis
19. DAILY I Van
20. DAILY II Dump Truck
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.